Well, I figured it out, it allows the exhaust gas to cool before exiting the tailpipe due to the DPF clean cycles, which could produce exit temperatures in excess of 1000*F, which could cause burns, start fires, ect., the tip uses a vacuum effect to suck in cool air with exiting exhaust to cool the mixture, thought I would share. ;)

Yes you are right. the instructer at the terrytown gm school said that if when the exhaust initiates a burn cycle,although usually on the highway, but sometimes it could be siiting at idle in your driveway that it could start to melt asphalt. the condition must be an "emergency" for it to burn at idle though.

DPF clean cycles, which could produce exit temperatures in excess of 1000*F, which could cause burns, start fires, ect.,

usually on the highway, but sometimes it could be siiting at idle in your driveway that it could start to melt asphalt
:eek: :eek:
So you could be sitting in traffic, the DPF initiates a burn off, and you roast the paint off of the vehicle next to you :o: .

pics? maybe?


lol just picturing cathing the bicylists leg on fire as he goes by.

This new DPF setup is going to make for some interesting post and reading :D

What a way to TOAST a FORD or DODGE(especially when your PASSING them)-:t -:t -:t

Where did you see this picture of the tailpipe?

Where did you see this picture of the tailpipe?

You can see it at the GMC website - click on the 3500HD tab and then on the 360 degree view, & then turn it around sideways.

on our trucks at work we had the grass burner tail pipes the firs few regens we did with series 60 and MBE 4000 we burned holes into the black top.

wait until and injector goes south and you load up the DPF and see mustard yellow smoke because the DPF melted down!!!!!!

on our trucks at work we had the grass burner tail pipes the firs few regens we did with series 60 and MBE 4000 we burned holes into the black top.

wait until and injector goes south and you load up the DPF and see mustard yellow smoke because the DPF melted down!!!!!!

I have seen that. Not a pretty sight. Wonder how healthy those fumes are to breathe:eek:

Thus my decision to get an LBZ while the gettin' was good...I never liked getting in on the first year of a total retool. I hope you all luck that chose to wait, maybe they got it all figured out so all you have to do is drive it????

If I read correctly when I was at the school this past week (on a different subject, not on diesels), you have to be driving 30mph plus and the clean cylce will take about 20 min. If you drop below 30mph it will shut off, once you go over 30 mph it will continue the cleaning from where it left off. Will not activate below that.

I have seen that. Not a pretty sight. Wonder how healthy those fumes are to breathe:eek:Tree huggers couldn't care less about the fumes!! They always ride in their airconditioned, air-sanitized limos or private jets. But by golly, your exhaust will have no particulates to block them from reading your license plate and reporting you for melting the asphalt.:mad:

Tree huggers couldn't care less about the fumes!! They always ride in their airconditioned, air-sanitized limos or private jets. But by golly, your exhaust will have no particulates to block them from reading your license plate and reporting you for melting the asphalt.:mad:

We have 3 classes of tree huggers around here, none of them ride in expensive jets.

1. College Class Hippie - Drives a 64 volkswagen bus that pollutes more than any vehicle made since 1973, threat level - zero
2. Ultra Left wing hippe - Usually seen in volvos, saabs, and or your occasional subuaru, threat level - minimal
3. Smug all aware hippe - only drives hybrid cars, threat level - dangerous, keep your kids away from these ones, 5 minutes and they will start quoting tedd kennedy and al gore.
4. Drive Big Suburbans to tree hug party but tell everyone else to DO AS WE SAY not as we do !

4. Drive Big Suburbans to tree hug party but tell everyone else to DO AS WE SAY not as we do !

above post corrected! ):h

A Job well done.:D

this is a portion of the latest gm tech link on the new exhaust.

"For the process to complete satisfactorily, the vehicle must be operated continuously for approximately 18 minutes at speeds greater than 30 mph (50 km/h) to efficiently clean the filter. If the engine is allowed to return to idle during this time, the idle speed may be elevated slightly and the operating sound may be different. This is normal, and the driver doesn’t need to do anything different.

During regeneration, the exhaust temperature increases (greater than 500° C), which converts the particulates into harmless gases and ash. The DPF is then clean and ready to filter particulates again."

Ive got a buddy who drives 4 miles to work and tows a toy hauler all summer. What will his truck do not regenerate all winter??????? I was talkign ot the local stealer, supposedly the new dpf's will be double insulated and the skins wont be any hotter then the current exhaust. I sure hope not and would hope they put in an over ride (though pry wont) casue if im hauling hay racks in and out of wheat stubble or corn in and out of corn fields, i dont want my truck on fire.

But Really, how long do you think this thing is going to stay on a truck......same with the exhaust filter devise.

Metal recyclers will make a fortune on these things. Like they did when catalytic converters came out in the 70's.:eek:

I have it from a source with-in the DOT that all federal emmisions regulations are going to be getting more enforcement after 2007. The testing equipment, mobil stations and state to state enforcement regulations are being assembled. Highway funds to the states are great leverage. In his words "many people are going to be unhappy when they have to buy converters to replace them".

I have it from a source with-in the DOT that all federal emmisions regulations are going to be getting more enforcement after 2007. The testing equipment, mobil stations and state to state enforcement regulations are being assembled. Highway funds to the states are great leverage. In his words "many people are going to be unhappy when they have to buy converters to replace them".
chicken little said the sky was falling too.................let them lick my sooty tailpipe

guess what, my truck has a cat but still pollutes and blows black smoke like crazy. what are they gonna do about it, thats how I bought it.

For anyone doing cross country driving associated with a business, especially certain industries and weights, it's no chicken little story. The DOT is most definetly looking at increasing revenue and is very aware of current trends. Carry on...

We have 3 classes of tree huggers around here, none of them ride in expensive jets.

1. College Class Hippie - Drives a 64 volkswagen bus that pollutes more than any vehicle made since 1973, threat level - zero
2. Ultra Left wing hippe - Usually seen in volvos, saabs, and or your occasional subuaru, threat level - minimal
3. Smug all aware hippe - only drives hybrid cars, threat level - dangerous, keep your kids away from these ones, 5 minutes and they will start quoting tedd kennedy and al gore.
4. Drive Big Suburbans to tree hug party but tell everyone else to DO AS WE SAY not as we do !

Where I live we have tree sitters. My buddy wanted to log a few trees on his property had a logging crew and everything. Well the crew showed up one morning and some idiot climbed up the tree and wouldn't come down until the logging stopped. My buddy was sooo pissed, he would go out there at night and put the red dot on him and then fire a different gun into the ground just to mess with him. I think he was up there for like 3 or 4 days. The thing is it caused so much local attention that some earth first group actually had the logging stopped saying that there was an endagered species of bird living amongst the trees. I think it was the Marbled Murelet(sp), they sent some hippie gal out to watch every few days for a couple months and she never saw the damn bird. Anyway, just thought I'd share.

:blahblah: For anyone doing cross country driving associated with a business, especially certain industries and weights, it's no chicken little story. The DOT is most definetly looking at increasing revenue and is very aware of current trends. Carry on...

yes the DPF has a skin on it after a regen the filter is warm but you and handle it.

yes the DPF has a skin on it after a regen the filter is warm but you and handle it.
Anyone actually know the skin temps on these dpf's vs the cats/tail pipes now. It really does scare me in a regular truck in wheat stubble or maybe crossing a windrow of hay now let alone w/a oven under there:badidea: :wtf: :damnit1: I wish they would leave these trucks alone they already really do such a good job. And the only real soot reduction device whether they ahve a dpf or not is the driver and his driving habbits.

I wouldn't be surprised if these new trucks won't run if something is tampered with in the emissions system...pull the cat or dpf & it won't start...it'll call onstar & report you the EPA!!
:muahaha: :joke:

I wouldn't be surprised if these new trucks won't run if something is tampered with in the emissions system...pull the cat or dpf & it won't start...it'll call onstar & report you the EPA!!
:muahaha: :joke:
Im sure anythign can be over ruled, and another reason not to get onstar.

I wouldnt be suprise d though if the computer wont store a code and store it in the computer if its ever unplugged. Maybe have to wire a switch into it to make it think its always ok?

DOT has been ALL OVER THE PLACE in southern CT and NY. Mainly for DOT numbers, and spot safety checks. First time in my life I've heard about DOT road blocks for spot inspection. Though none of this was for emissions, I imagine it could be added to their list very easily.

i think the exhaust looks like a 2.5" caliber musket from 1850. Either that or its a banana in the tail pipe prevention tool. We will see.....

I wouldnt be suprise d though if the computer wont store a code and store it in the computer if its ever unplugged. Maybe have to wire a switch into it to make it think its always ok?

Hi jdman,
your are wrong.;) . The ECM will recognize the unplugging via plausabilty checks of pressure [will be changing] over the trap and the driven milage !!

Im sure anythign can be over ruled, and another reason not to get onstar.You will get OnStar whether you want it or not. GM had made it standard on all new 2007 GMT900 trucks and added the cost to the base price. So even if you don't use it you'll still be paying for it. :(

Unless you are buying a fleet of trucks and you specify OnStar DELETE, you will get OnStar.:mad: The key word here is FLEET Sales are the only ones allowed to delete OnStar.

You will get OnStar whether you want it or not. GM had made it standard on all new 2007 GMT900 trucks and added the cost to the base price. So even if you don't use it you'll still be paying for it. :(

Unless you are buying a fleet of trucks and you specify OnStar DELETE, you will get OnStar.:mad: The key word here is FLEET Sales are the only ones allowed to delete OnStar.

Hey,

I have a serious problem with that. If I ever buy a brand new truck, I do not want onstar, and if I buy a used one, I would love to disable it. Is their a way? Tech II maybe?

You will get OnStar whether you want it or not. GM had made it standard on all new 2007 GMT900 trucks and added the cost to the base price. So even if you don't use it you'll still be paying for it. :(

Unless you are buying a fleet of trucks and you specify OnStar DELETE, you will get OnStar.:mad: The key word here is FLEET Sales are the only ones allowed to delete OnStar.
Didnt know that, something to keep in mind

Hi jdman,
your are wrong.;) . The ECM will recognize the unplugging via plausabilty checks of pressure [will be changing] over the trap and the driven milage !!

We will all find out, I don tknow a whole lot about these, little guys, Im a mechanic for a rental company ie construction and equipment, dont get to work on these trucks a whole lot. Dont get training on these little trucks either. Dont get much training at all but what I do get, is mostly on semi trucks (as construction wont see these dpf's tll 2011 msot likely, tiem will tell

Hey,

I have a serious problem with that. If I ever buy a brand new truck, I do not want onstar, and if I buy a used one, I would love to disable it. Is their a way? Tech II maybe?
This is one more reason why I'm glad that I got a 2006 LBZ. One of the reasons I had the dealer order this truck for me was because I did NOT want OnStar and I didn't want to have to pay for it. Everything that OnStar could offer me, I can do cheaper and better with my own equipment and I don't have to pay their on-going monthly charges.

I hope that GM eventually allows regular customers to DELETE OnStar, because I will stay away from any vehicle equipped with OnStar if I can at all help it.:( This could force me to buy a different brand when I'm ready to buy again. Maybe by the time I decide to replace this truck Toyota will have a decent 3/4-Ton truck with a diesel engine. I hope it doesn't get to this.

I will stay away from any vehicle equipped with OnStar if I can at all help it.

Not pointed towards you but who cares if it has onstar or not? you dont have to payfor it if you dont use it and its not hurting anything.

Not pointed towards you but who cares if it has onstar or not? you dont have to payfor it if you dont use it and its not hurting anything.The MSRP for OnStar on these trucks is around $650 --If GM makes it standard equipment, they add that amount to the Base Price of the truck, so even if you decide not to pay the monthly fee and not use it, you will still have paid for the equipment up front and not get any benefit and you now have another electronic module that can go bad and give you headaches. I simply don't want it in my truck and don't want to pay for it at all.

This would be the same as if you bought the truck with an optional dealer installed Warn winch but never had any intention of using it. It would be money wasted for nothing. You would be better off getting the truck without a winch and not pay the extra cost. At least you could remove the winch and sell it to someone else, but you can't do that with OnStar. It would be a nightmare to try to remove all the OnStar equipment and then try to install it in another truck that did not have it originally.

RayMich,

You stated earlier "Everything that OnStar could offer me, I can do cheaper and better with my own equipment and I don't have to pay their on-going monthly charges."
I would be interested in this as I am unaware of any automotive safety device systems that will contact a montoring center with data as to the seriousness of my collision & track me via gps & satallite & attmpt to contact me & dispatch ems to my exact location all the while I am unconcious upside down far from the road in a very heavy snowstorm on a rarely travelled road in central Ontario, Canada, because I too would like not "to have to pay their on-going monthly charges. Also the 21 year old kid who crashed his honda with his girlfriend & sister in the car last summer in to a rock face about 30 meters off the road at 90 kph, with their facial lacerations & broken limbs really appreciated the on-star cellular phone signal strength I lent them, as no personal cell phones had enough strength for the range required.
Please pass along the info, I do dislike the monthly $28.XX/monthly charges.

Thanks, Todd.:)

I would be interested in this as I am unaware of any automotive safety device systems that will contact a montoring center with data as to the seriousness of my collision & track me via gps & satallite & attmpt to contact me & dispatch ems to my exact location all the while I am unconcious upside down far from the road in a very heavy snowstorm on a rarely travelled road in central Ontario, Canada,

lmao

good point

RayMich,

You stated earlier "Everything that OnStar could offer me, I can do cheaper and better with my own equipment and I don't have to pay their on-going monthly charges."
I would be interested in this as I am unaware of any automotive safety device systems that will contact a montoring center with data as to the seriousness of my collision & track me via gps & satallite & attmpt to contact me & dispatch ems to my exact location all the while I am unconcious upside down far from the road in a very heavy snowstorm on a rarely travelled road in central Ontario, Canada, because I too would like not "to have to pay their on-going monthly charges. Also the 21 year old kid who crashed his honda with his girlfriend & sister in the car last summer in to a rock face about 30 meters off the road at 90 kph, with their facial lacerations & broken limbs really appreciated the on-star cellular phone signal strength I lent them, as no personal cell phones had enough strength for the range required.
Please pass along the info, I do dislike the monthly $28.XX/monthly charges.

Thanks, Todd.:)First of all OnStar works mainly via Verizon's analog cellar network. It just so happens that there are more analog cellular towers in service compared to the two main digital cellular technologies. And therefore, there is better area coverage available for OnStar users. But if you are "unconscious upside down far from the road in a very heavy snowstorm on a rarely traveled road in central Ontario, Canada", the OnStar antenna will very likely be CRUSHED and Onstar will not work. Also, there ARE places where OnStar is useless and it doesn't matter how many times you push that blue button, you will NOT get through, particularly in remote areas out west where NO cellular service is available at all. There also are remote areas in Canada and Mexico where OnStar does not work. (Been There, Done That!)

Additionally, OnStar will be moving all of their services to digital and will no longer support analog service some time around the end of 2008. So if your vehicle is equipped with the older "analog only" OnStar system you will lose OnStar service when they stop supporting the analog network. All of the current OnStar systems being sold today ARE digital ready, so they will have no problem switching to digital, and some of the late model vehicles have upgradable systems that you can pay to get them digital ready, but the older analog systems cannot be upgraded and will lose the service. OnStar has already stated that digital area coverage will not be as extensive as their current analog system.

As for navigation, my portable GPS unit gives me spoken turn-by-turn directions along with area maps on the screen and I don't have to pay on-going monthly fees. It works worldwide even in remote wilderness areas as long as you have visible access to the open sky. (I can easily move it from vehicle to vehicle - OnStar cannot be moved)

If I suspect that I may need help in remote areas, I can always obtain a small PLBs (Personal Locator Beacon). PLBs work worldwide using the same satellite network used by EPIRBs on recreational and commercial ocean-going vessels and have been approved for use in the U.S. since July 1st, 2003. These PLBs have MSRP in the range of $450 to $650 depeding on the model and they can some times be purchased for less. Once you have purchased a PLB and you register it online, there are NO ongoing monthly fees for using it.
"PLBs are portable units that operate much the same as EPIRBs or ELTs. (ELT - Emergency Locator Transmitter - for aircrafts) These personal beacons are designed to be carried by an individual person instead of on a boat or aircraft. Unlike ELTs and some EPIRBs, they can only be activated manually and operate on 406 MHz. And like EPIRBs and ELTs all PLBs also have a built-in, low-power homing beacon that transmits on 121.5 MHz. This allows rescue forces to home in on a beacon once the 406 MHz satellite system has gotten them "in the ballpark" (about 2-3 miles) Once this homing beacon is engaged, it will direct rescue forces right to the victim. .Some newer PLBs also allow GPS units to be integrated into the distress signal. This GPS-encoded position dramatically improves the initial 406 MHz satellite system location accuracy down to the 100-meter level…that’s roughly the size of a football field! -- In the United States, PLBs are now authorized for nationwide use. This authorization was granted by the FCC beginning July 1st, 2003". (http://www.sarsat.noaa.gov/emerbcns.html)
Personal Locator Beacons (PLBs) Approved in U.S. (http://www.equipped.com/plb_legal.htm)

As the PLBs become more popular, I expect that automatic activation will eventually be incorporated into newer units.

Here is the story about the very first PLB assisted rescue in the United states. (http://www.equipped.com/plb_first_use.htm)

Here are a couple of examples of PLBs currently available to the general public.AquaFix™ 406 GPS I Personal Locator Beacon (http://www.westmarine.com/webapp/wcs/stores/servlet/product/10001/-1/10001/136071/10001/53/52/8) - Can be interfaced with your onboard GPS to send out a position fix within seconds from being activated.

AquaFix™ 406 GPS I/O Personal Locator Beacon (http://www.westmarine.com/webapp/wcs/stores/servlet/product/10001/-1/10001/136072/10001/53/52/8) - Has a built-in internal GPS.
OnStar claims that they can locate my truck if it is stolen, but I have read several instances where OnStar refused to help until they got an official police report number, which in one instance (for a member of this forum) even though a police officer got on the phone and identified himself, they still refused to help until they got the "official" police report number which took over an hour to process and by then it was too late because the thief had already wrecked the truck. Thieves now a days will pull out the OnStar fuse and easily kill this tracking device.

OnStar can unlock my car remotely if I lock myself out. But I have solved this problem by carrying a spare key in my wallet. At the remote chance that I lock my wallet in the car, I can call GMC or Chevrolet customer assitance and they can sned a locksmith to unlock the vehicle or direct me to a GM dealer who will make a new key for me for $10. (GM will reimburse the $10) Yes, there is some inconveniece with this method, but for me, the cost outweighs any benefit (I had to do this once in 2002 when my wife locked her purse in the truck. - No big deal other than spending $10 which GM would have reimbursed if I had sent them the receipt)

OnStar makes things very convenient by providing a cell phone and a GPS receiver in the vehicle. But it cannot be moved to another vehicle, you have pay monthly ongoing fees and many times its not very accurate. I have three vehicles in my family and I can easily move my equiment to any one of them in about 30 seconds. If I had OnStar on all three vehicles you can easily do the math as to what my initial cost plus on-going monthly fees would be, TIMES THREE. :(

I was traveling with my brother-in-law two years ago in his brand new Oldsmobile when we needed directions to a particular address and OnStar sent us out to the countryside damn near to the middle of a corn field. When we called back the OnStar operator and told her where she had sent us she proceeded to argue with us telling us that she could see right on her screen that we were in the city at the address she had sent us.

Yes, it is possible to be knocked unconscious and have OnStar summon help automatically, but this doesn't happen very often and I'm willing to take my chances with that one. Any emergency situation I have ever encountered, I was able to use my cell phone to call for help. For me the cost outweighs the benefit.

There are other personal privacy issues about OnStar that discourage me from getting it on any of my vehicles. It's a matter of personal choice for me. -- But if it works for you, that is GREAT!! - I hope you enjoy many years of happy service. :)

I would'nt mind OnStar to much if GM would center the antenna at the back of the Cab where it would look better. ;) Mike

First of all OnStar works mainly via Verizon's analog cellar network. It just so happens that there are more analog cellular towers in service compared to the two main digital cellular technologies. And therefore, there is better area coverage available for OnStar users. But if you are "unconscious upside down far from the road in a very heavy snowstorm on a rarely traveled road in central Ontario, Canada", the OnStar antenna will very likely be CRUSHED and Onstar will not work. Also, there ARE places where OnStar is useless and it doesn't matter how many times you push that blue button, you will NOT get through, particularly in remote areas out west where NO cellular service is available at all. There also are remote areas in Canada and Mexico where OnStar does not work. (Been There, Done That!)

Additionally, OnStar will be moving all of their services to digital and will no longer support analog service some time around the end of 2008. So if your vehicle is equipped with the older "analog only" OnStar system you will lose OnStar service when they stop supporting the analog network. All of the current OnStar systems being sold today ARE digital ready, so they will have no problem switching to digital, and some of the late model vehicles have upgradable systems that you can pay to get them digital ready, but the older analog systems cannot be upgraded and will lose the service. OnStar has already stated that digital area coverage will not be as extensive as their current analog system.

As for navigation, my portable GPS unit gives me spoken turn-by-turn directions along with area maps on the screen and I don't have to pay on-going monthly fees. It works worldwide even in remote wilderness areas as long as you have visible access to the open sky. (I can easily move it from vehicle to vehicle - OnStar cannot be moved)

If I suspect that I may need help in remote areas, I can always obtain a small PLBs (Personal Locator Beacon). PLBs work worldwide using the same satellite network used by EPIRBs on recreational and commercial ocean-going vessels and have been approved for use in the U.S. since July 1st, 2003. These PLBs have MSRP in the range of $450 to $650 depeding on the model and they can some times be purchased for less. Once you have purchased a PLB and you register it online, there are NO ongoing monthly fees for using it.

"PLBs are portable units that operate much the same as EPIRBs or ELTs. (ELT - Emergency Locator Transmitter - for aircrafts) These personal beacons are designed to be carried by an individual person instead of on a boat or aircraft. Unlike ELTs and some EPIRBs, they can only be activated manually and operate on 406 MHz. And like EPIRBs and ELTs all PLBs also have a built-in, low-power homing beacon that transmits on 121.5 MHz. This allows rescue forces to home in on a beacon once the 406 MHz satellite system has gotten them "in the ballpark" (about 2-3 miles) Once this homing beacon is engaged, it will direct rescue forces right to the victim. .Some newer PLBs also allow GPS units to be integrated into the distress signal. This GPS-encoded position dramatically improves the initial 406 MHz satellite system location accuracy down to the 100-meter level…that’s roughly the size of a football field! -- In the United States, PLBs are now authorized for nationwide use. This authorization was granted by the FCC beginning July 1st, 2003". (http://www.sarsat.noaa.gov/emerbcns.html)
Personal Locator Beacons (PLBs) Approved in U.S. (http://www.equipped.com/plb_legal.htm)

As the PLBs become more popular, I expect that automatic activation will eventually be incorporated into newer units.

Here is the story about the very first PLB assisted rescue in the United states. (http://www.equipped.com/plb_first_use.htm)


Here are a couple of examples of PLBs currently available to the general public.AquaFix™ 406 GPS I Personal Locator Beacon (http://www.westmarine.com/webapp/wcs/stores/servlet/product/10001/-1/10001/136071/10001/53/52/8) - Can be interfaced with your onboard GPS to send out a position fix within seconds from being activated.


AquaFix™ 406 GPS I/O Personal Locator Beacon (http://www.westmarine.com/webapp/wcs/stores/servlet/product/10001/-1/10001/136072/10001/53/52/8) - Has a built-in internal GPS.
OnStar claims that they can locate my truck if it is stolen, but I have read several instances where OnStar refused to help until they got an official police report number, which in one instance (for a member of this forum) even though a police officer got on the phone and identified himself, they still refused to help until they got the "official" police report number which took over an hour to process and by then it was too late because the thief had already wrecked the truck. Thieves now a days will pull out the OnStar fuse and easily kill this tracking device.

OnStar can unlock my car remotely if I lock myself out. But I have solved this problem by carrying a spare key in my wallet. At the remote chance that I lock my wallet in the car, I can call GMC or Chevrolet customer assitance and they can sned a locksmith to unlock the vehicle or direct me to a GM dealer who will make a new key for me for $10. (GM will reimburse the $10) Yes, there is some inconveniece with this method, but for me, the cost outweighs any benefit (I had to do this once in 2002 when my wife locked her purse in the truck. - No big deal other than spending $10 which GM would have reimbursed if I had sent them the receipt)

OnStar makes things very convenient by providing a cell phone and a GPS receiver in the vehicle. But it cannot be moved to another vehicle, you have pay monthly ongoing fees and many times its not very accurate. I have three vehicles in my family and I can easily move my equiment to any one of them in about 30 seconds. If I had OnStar on all three vehicles you can easily do the math as to what my initial cost plus on-going monthly fees would be, TIMES THREE. :(

I was traveling with my brother-in-law two years ago in his brand new Oldsmobile when we needed directions to a particular address and OnStar sent us out to the countryside damn near to the middle of a corn field. When we called back the OnStar operator and told her where she had sent us she proceeded to argue with us telling us that she could see right on her screen that we were in the city at the address she had sent us.

Yes, it is possible to be knocked unconscious and have OnStar summon help automatically, but this doesn't happen very often and I'm willing to take my chances with that one. Any emergency situation I have ever encountered, I was able to use my cell phone to call for help. For me the cost outweighs the benefit.

There are other personal privacy issues about OnStar that discourage me from getting it on any of my vehicles. It's a matter of personal choice for me. -- But if it works for you, that is GREAT!! - I hope you enjoy many years of happy service. :)


:blahblah: :blahblah: :blahblah: :blahblah: :D ):h

If you're worried about onstar and don't want it activated... pull the fuse.

That simple.

Here we go...another Onstar debate. :rolleyes:

So, does it run off a satellite? COMPLETELY JOKING ):h

Um, guys.....this thread is about the DPF exhaust and the funny exhaust tip....enough with the Onstar debate already.

I think what WILL be interesting is how MBRP, Silverline and all the rest will deal with this new technology. Will they have to incorporate it or will they delete it with a pipe?
Will someone come out with a "Fingerstick"-like device that will block codes from being set if the DPF is removed?
Will garages refuse to work on the vehicle if the DPF is removed like the '70s when cats first came out?

It sucks that we are having to pay for the equipment that we will end up taking a sawzall to.

It sucks that we are having to pay for the equipment that we will end up taking a sawzall to.
:funnypost

RayMich,

....I am unaware of any automotive safety device systems that will contact a montoring center with data as to the seriousness of my collision & track me via gps & satallite & attmpt to contact me & dispatch ems to my exact location all the while I am unconcious upside down far from the road in a very heavy snowstorm on a rarely travelled road.....
Thanks, Todd.:)


i thought that onstar was a great idea too (was a big selling point in buying our suburban) - until my wife was in a serious front end collision when she was 5 months pregnant, where the airbags went off etc. however, onstar didnt take any action until 4 days after the accident, at which time i think they had a great conversation with the guy at the body shop.

As Sam stated in his initial post, the LMM exhaust gasses will be very hot during DPF regeneration. The special stailpipe will cause a venturi effect that will suck in cool air from the outside. This cool air mixes with the hot exhaust gasses and cools the gasses down to a more acceptable temperature.

Enclosed is a sketch of the LMM tailpipe.

Will garages refuse to work on the vehicle if the DPF is removed like the '70s when cats first came out?I suspect that we will be seeing EPA regulations for the DPF similar to those for catalytic converters. :(

Why take a sawzall to the DPF and exhaust. Just route the plumbing up through the bed and put on some fat stacks. I can only imagine it now, an LMM running 13's and flames coming out from the stacks all the way down the strip/hwy/ whenever its moving above 30 mph. Think of the reactions of people behind you. Talk about a shock and awe campaign:D :weld:

:funnypost :muahaha:

What this is telling me is the aftermarket exhaust may be pretty limited. You may not be able to remove the DPF and with the special tailpipe, what can you change? Seems very limited...

MaxRock

This may be common knowledge, but Dodge's DPF can be taken off and not be against the law according to published reports and articles stating the DPF is separate from the emission control system on the Dodge. Wonder about he the LMM's DPF? Chris

This may be common knowledge, but Dodge's DPF can be taken off and not be against the law according to published reports and articles stating the DPF is separate from the emission control system on the Dodge. Wonder about he the LMM's DPF? Chris

Seems like if it's legal to do that with one manufacturer's trucks, it should be legal for the rest?

This may be common knowledge, but Dodge's DPF can be taken off and not be against the law according to published reports and articles stating the DPF is separate from the emission control system on the Dodge. Wonder about he the LMM's DPF? Chris
you may want to check into that emission device removal is tampering no matter what manufacturer it is from. its federal law not laws of the big 3

Well here's one article about the DPF on the Dodge:

"Within the 6.7-liter Dodge Ram Heavy Duty exhaust system, reducing particulate matter is achieved through a self-cleaning Diesel Particulate Filter (DPF). The muffler is isolated from the emissions control system, therefore customers may remove the muffler without violating emissions compliance. The emissions system is designed for a government-certified 120,000 miles."

So by this, does it mean a separate muffler can be removed with no problems, or is the muffler the DPF itself. I was under the assumption the DPF is the muffler?

Here's the link: http://www.theautochannel.com/news/2006/09/28/023411.html

no. the dpf will be before the muffler. cat,dpf,muffler. the article is saying that you can add an aftermarket muffler if you want.i can just see the aftermarket ads now(turbo back,cat back,dpf back.........)what a pain pretty soon they will have to make a double crew cab just to accomidate the exhaust:p:

Here we go...another Onstar debate. :rolleyes:

So, does it run off a satellite? COMPLETELY JOKING ):h

I've got a friend who's brother's dad has a neighbor who heard from a guy on a subway that he knows someone who's married to a GM engineer who said that OnStar runs off the USSR satellite Sputnik, which gives you total 100% coverage over the entire globe even when your truck has no battery power or is on fire.

Hi jdman,
your are wrong.;) . The ECM will recognize the unplugging via plausabilty checks of pressure [will be changing] over the trap and the driven milage !!

"Your are wrong"? How about "You're are wrong"? Or even better, You are wrong.

The DPF will have sensors in it just like the O2 sensors that've been in exhaust systems for years. Your ECM will know if you unplugged it because it'll stop getting signal, not because it'll notice a backpressure drop.