I've owned my '08 LMM since December and have read through a number of different threads regarding the removal of the DPF. I had the LB7 in my last truck and drove it to 120,000 miles without a single issue and it was never modified so I've been reluctant to change the LMM. But, over the last 8 months, the fuel mileage on the new truck has been this constant thorn in my side. I have tried to find a larger fuel tank to help hide the mileage problem but can only find tanks that hang below the frame rail and that doesn't work for how I use the truck. I have now decided to take off my DPF and was curious if there have been any new updates with programmers or what the recommended programmer is. This is a farm truck and it has plenty of power in it's stock form to comfortably haul anything I have so I don't plan to increase the power of the truck. It also survived this years wheat harvest without setting a field on fire, which was a concern of mine also and still is.

This month's Diesel Power magazine features an article in the Diesel Tech section about deleting the DPF with pro's and con's. Reading this has given me more confidence but also makes it pretty clear that the warranty will be voided. They recommend the following programmers in the article, EFILive, PPE, or Quadzilla. They don't mention anything about clearing codes though. They did mention, that out of the 'Big Three' that the LMM was the easiest to convert. I have a close friend that is the Service Manager at our local Chevy Dealership. I called him this morning to get his feedback but he was quick to say that he hasn't had to service many LMM's but wasn't aware of any strict restrictions from GM on the service work. I know I can take the truck there to have it worked on and he will not report the programmer and/or the missing DPF filter if he can. If GM requires a certain report then he just might not be up to speed yet with that and in that case his hands would be tied.

I apologize for the long thread. I'm by no means an expert at any of this and, by this group's standard, pretty boring because I don't do any of the modifications...yet. I was hoping to hear some feed back on which programmers have worked the best and if anyone has had trouble with their trucks after deleting the DPF and keeping a stock tune. Also, just an FYI, on average I get around 14MPG...seems to be about 2MPG worse than my LB7. The difference between the LMM and the LB7 is probably closer to 4MPG when towing. My LMM has about 12,000 miles on it.

Thanks in advance for any advice/opinions!!

Greg

gresmi, i am in the same situatuion as you are. i have 2007.5 lmm and want to take the dpf off. but there is a part of me that says something will go wrong as soon as i take it off. i have 20,500 miles on my truck and the only thang that ever went wrong was the plastic kick panels inside came off. any info would be greatly appreciated. thank you

GeneralC, I just got off the phone again with my local service manager. He said that GM does require him to take a 'snap-shot' of the trucks ECM for any warranty work. His experience is that GM will warranty the truck if they feel the program/tune change did the warranty damage. He wasn't aware of GM becoming any more stringent then they were in the past though.

I am slowly convincing myself that I'm going to make the change. I drove my LB7 without a single warranty issue and I'm hoping to have the same luck with the LMM. It's my opinion, running with a stock tune and without the DPF, I'm adding life to my LMM.

Thanks for the reply and I'll try to keep you posted on what I find. A friend of mine just purchased a leftover '08 on Tuesday. He is a custom harvester and has been through a number of trucks. He has found a group up in Illinios (I think) that guts the DPF filter and then reinstalls it onto the truck. He makes it sound pretty easy and he is taking is truck and converting is in the next few weeks. I don't plan to do that to my truck but will follow how he gets along and try to find out more information on how many people are running trucks with that setup.

Greg

thanks gresmi. thats all i wanna do to is run a stock tune. maybe like a 40 horse tune at most. i have also heard that the dpf needs to be replaced at like 115,000 miles because they eventually fail. i have also heard, like you said, that the dpf actually chokes the motor and does more harm that good. please keep me updated

When I bought mine a year ago the dealer told me to complain at say 80,000 of power and performance and then they would more than likely replace the DPF under warranty.

Brian

Just do it. I have had mine off since almost mile 1. You will love the power, the sound, and the mpg . Better then factory. I am using PPE and MBRP 5" turbo back.

I have pretty much decided now to wait until the 5 yrs are up before I delete the DPF.
There is just to much at stake in my opinion.
I am looking at deleting the muffler only, that is all at this time.
More than likely because of my age I`m thinking this.

Keep in mind that when GM takes a snapshot of the ECM they are only going to know that you loaded A tune, and have no idea of what you changed. In there eyes you could have loaded a 200hp tune, and it would look just the same as changing a tune that only had the DPF codes removed.

In a nutshell, you'll loose your powertrain warrantee.

true dat

Just another angle on the stupid DPF. Not only do you get worse mpg, loss of power, and sound ect. But and this is a biggie in my books that you don't here many talk about is FUEL DELUTION in the oil. 4-5.5% is outragous! That WILL induse engine wear. So I would not run long oil change intervals. If you want to know exactly whats going on get a hold of Terry Dyson!

Pee Wee

I've owned my '08 LMM since December and have read through a number of different threads regarding the removal of the DPF. I had the LB7 in my last truck and drove it to 120,000 miles without a single issue and it was never modified so I've been reluctant to change the LMM. But, over the last 8 months, the fuel mileage on the new truck has been this constant thorn in my side. I have tried to find a larger fuel tank to help hide the mileage problem but can only find tanks that hang below the frame rail and that doesn't work for how I use the truck. I have now decided to take off my DPF and was curious if there have been any new updates with programmers or what the recommended programmer is. This is a farm truck and it has plenty of power in it's stock form to comfortably haul anything I have so I don't plan to increase the power of the truck. It also survived this years wheat harvest without setting a field on fire, which was a concern of mine also and still is.

This month's Diesel Power magazine features an article in the Diesel Tech section about deleting the DPF with pro's and con's. Reading this has given me more confidence but also makes it pretty clear that the warranty will be voided. They recommend the following programmers in the article, EFILive, PPE, or Quadzilla. They don't mention anything about clearing codes though. They did mention, that out of the 'Big Three' that the LMM was the easiest to convert. I have a close friend that is the Service Manager at our local Chevy Dealership. I called him this morning to get his feedback but he was quick to say that he hasn't had to service many LMM's but wasn't aware of any strict restrictions from GM on the service work. I know I can take the truck there to have it worked on and he will not report the programmer and/or the missing DPF filter if he can. If GM requires a certain report then he just might not be up to speed yet with that and in that case his hands would be tied.

I apologize for the long thread. I'm by no means an expert at any of this and, by this group's standard, pretty boring because I don't do any of the modifications...yet. I was hoping to hear some feed back on which programmers have worked the best and if anyone has had trouble with their trucks after deleting the DPF and keeping a stock tune. Also, just an FYI, on average I get around 14MPG...seems to be about 2MPG worse than my LB7. The difference between the LMM and the LB7 is probably closer to 4MPG when towing. My LMM has about 12,000 miles on it.

Thanks in advance for any advice/opinions!!

Greg

We've had customers complain about getting that kind of mileage and have put one of our systems on and got an increase of 2-3 mpgs right off the bat. You will pose the risk of voiding your powertrain warranty with this or any other programmer you use on the truck but with several dealerships using this kit to appease customers, even the dealers are sucombing to the problems. If you don't need anymore power, you can just delete the cat and put a stock power tune in with the Quadzilla tuner so you won't be stressing the transmission or the engine.

let me know if I can help.

Chad

Just another angle on the stupid DPF. Not only do you get worse mpg, loss of power, and sound ect. But and this is a biggie in my books that you don't here many talk about is FUEL DELUTION in the oil. 4-5.5% is outragous! That WILL induse engine wear. So I would not run long oil change intervals. If you want to know exactly whats going on get a hold of Terry Dyson!

Pee Wee

this has been an issue with the Dodge/Cummin boys, but haven't heard of anyone complaining about rising oil levels or traces of fuel in their oil here on this sight. The guys running the oil analysis would have spoken up by now.

Runaway,
Not be smart ash, but there IS a fuel delution problem.There is simpley to much fuel being dumped in these engines to "steam clean" the DPF. If you don't belive me, that's fine but hire Terry Dyson and do an oil analisis. That takes all the guess work out of it,it's that simple.
I know some will say that thats "alot of money" just to find that information out. But the way I look at it, it's not even the price of one tank full of fuel.

Just trying to help some out
P.W.

Keep in mind that when GM takes a snapshot of the ECM they are only going to know that you loaded A tune, and have no idea of what you changed. In there eyes you could have loaded a 200hp tune, and it would look just the same as changing a tune that only had the DPF codes removed.

In a nutshell, you'll loose your powertrain warrantee.

with gm in the financial straights that they are, if you think they are going to cut anyone any slack on a powertrain-related warranty (==expensive) while there is evidence of a tuner, you're naive. LMM_Guy is right on IMO.

i'm conflicted about the DPF. i love that there is no smoke and no smell. the mileage is worse than i'd like though, and there is no arguing that if you don't burn an extra gallon (or two - whatever it is) to complete a regen, you'll get better mpg. assuming, of course, no power is being added.

i'll wait until the 5yr/100k is up before i do it. the chance of needing to replace a motor or trans during the warranty period for an extra 1-2mpg and the smoke/smell isn't worth it to me.

ahm

Chad, thanks for the feedback. Can you tell me what's included in your September LMM Delete package for $565?

Having seen the article in Diesel Power about deleting the DPF tells me there are a lot of owners doing this and not just the performance guys. It also said, in the article, they are able to do this legally by claiming that the vehicle is for 'Off-road Use Only'. If that is the case, is GM claiming they will not cover any warranty cost if a vehicle is used for 'Off-road Use Only'?? I'm sure it won't be too long and they'll prohibit any tampering with the emission systems on these vehicles.

Thanks for the response,

Greg

Chad, thanks for the feedback. Can you tell me what's included in your September LMM Delete package for $565?

Having seen the article in Diesel Power about deleting the DPF tells me there are a lot of owners doing this and not just the performance guys. It also said, in the article, they are able to do this legally by claiming that the vehicle is for 'Off-road Use Only'. If that is the case, is GM claiming they will not cover any warranty cost if a vehicle is used for 'Off-road Use Only'?? I'm sure it won't be too long and they'll prohibit any tampering with the emission systems on these vehicles.

Thanks for the response,

Greg

Greg,

Any modification done to the emissions systems is tampering, weather for Off Road Use Only or not, don't let anyone fool you. That being said, I have many dealers calling me for this kit because of pist off new truck buyers expecting their new LMM to get teh same mileage as their old LLY did. Seems like the average is 14.5 and they used to get 18-19 with their LLY's.

PM sent on the kit details.

I would like to see some proof of the oil delution problems you speak of in a duramax. It's not like this fuel is getting sprayed at a time when it won't be burned, it's getting injected at a time when it will burn......just not in the cylinder. The whole objective of the regen is to drive the exhaust temps through the roof burn up the soot. In order to get oil delution you would have to have fuel injected at a time when it couldn't be burned, and that won't happen the way GM has these trucks setup.

I've been wrong before.....but I would like to see some proof of this.

FYI on fuel mileage

These are true hand calculated figures with half city and half highway:

When truck was new and stock: 17 mpg

After 6" lift with 35" tires and PPE tuner lvl 2 with MBRP filter back exhaust: 14.5

Same as above with DPF delete and EGR blocker plate: 18.5 mpg

I could not be happier with this truck after the mods. To be honest when the truck was stock with the whole regen thing it was really starting to piss me off. For me it is well worth the risk not to mention the truck is much more responsive and fun to drive.

Runaway,
Not be smart ash, but there IS a fuel delution problem.There is simpley to much fuel being dumped in these engines to "steam clean" the DPF. If you don't belive me, that's fine but hire Terry Dyson and do an oil analisis. That takes all the guess work out of it,it's that simple.
I know some will say that thats "alot of money" just to find that information out. But the way I look at it, it's not even the price of one tank full of fuel.

Just trying to help some out
P.W.

You do realize this isn't a Ford forum, right? :D

with gm in the financial straights that they are, if you think they are going to cut anyone any slack on a powertrain-related warranty (==expensive) while there is evidence of a tuner, you're naive. LMM_Guy is right on IMO.

i'm conflicted about the DPF. i love that there is no smoke and no smell. the mileage is worse than i'd like though, and there is no arguing that if you don't burn an extra gallon (or two - whatever it is) to complete a regen, you'll get better mpg. assuming, of course, no power is being added.

i'll wait until the 5yr/100k is up before i do it. the chance of needing to replace a motor or trans during the warranty period for an extra 1-2mpg and the smoke/smell isn't worth it to me.

ahm


I got a 4mpg increase in the combined highway/city, and a 5mpg increase on the highway @72mph. I've posted my calcs a while back. For the first 5 years, I will save about $8K in fuel costs, cost me only $700 to make the change. I'll take my chances on a motor/tranny combo that is almost unchanged (except for improvements) over the last 8 years. Best mod ever done to any one of my vehicles, without a doubt. Chris

thanks for all the input guys. im pretty sure im gonna do the delete. im gonna go talk to my dealership and see what they say about all this dpf bulls**t. what is included in your september delete package chad ? once again thanks guys

thanks for all the input guys. im pretty sure im gonna do the delete. im gonna go talk to my dealership and see what they say about all this dpf bulls**t. what is included in your september delete package chad ? once again thanks guys

PM sent

I keep seeing references to a DIY on the DPF Delete that includes pix. Where is it? I have been looking for over an hour! Please point me to it I want to see if it is something I can do...
Thanks - Dave

These trucks are big investments and its wise to consider how mods could void warranties!
I read for hours on this site and spoke to many vendors before starting my modifications. I did a turbo back MBRP,EGR blocker plate,PCV reroute and PPE tuner at 500 miles so I don't have much before and after to compare, but my truck runs very smooth. Other friends have stock LMM's and they dont see the mileage I am getting ( 19-20 HWY / 15 -17 rural ) nor do they run as un-restricted. It's amazing how much of a difference there is if you drive mine right after driving a stock LMM. I firmly believe the DPF is slowly killing these trucks and made my mods with getting more longevity out of the Duramax. Mileage is a big consideration but I am driving a 7,000 lb. truck not a Honda Civic.
All that having been said ( morning coffee ) I would do it again in a second !! Pick a vendor or PM me if you want a recommendation on a few.

Good post. There is no comparison between a stock truck and a DPF deleted one. EGTs, mileage, and sound are all greatly improved.

Good post. There is no comparison between a stock truck and a DPF deleted one. EGTs, mileage, and sound are all greatly improved.

How is it that the sound is improved? I'm not sure I understand. Is is quieter? If so, that would indeed be an improvement.

How is it that the sound is improved? I'm not sure I understand. Is is quieter? If so, that would indeed be an improvement.

How can it get quieter than going thru the DOC, DPF, and then the muffler. If it is too loud, your too old :D

How is it that the sound is improved? I'm not sure I understand. Is is quieter? If so, that would indeed be an improvement.

The sound is not quieter at all, it will get noisier with a DPF Delete. If you have heard any Dmax with and aftermarket exhaust, they sound cool to most folks, but there are some that think the added noise and resonance form doing a turbo back exhaust is is annoying. So if you prefer the quiet of you stock truck, then keep the DPF.

My self personally run a Magnaflow turbo back exhaust and have found it a happy medium for a throatier exhaust and quiet enough to keep momma happy whilst we have the camper in tow.

Okay thanks guys. Guess I'm too old, because, yes, quieter is better to me. Not to mention I also like no smell, and no soot or smoke. Basically, I just love my DPF!!

Now that I know it makes my truck quieter makes me love it even more!! :D

Okay thanks guys. Guess I'm too old, because, yes, quieter is better to me. Not to mention I also like no smell, and no soot or smoke. Basically, I just love my DPF!!

Now that I know it makes my truck quieter makes me love it even more!! :D

Delete Hater:D

I dont see how the stock LMM could get any quieter. Most everybody wants there truck to sound somewhat like a diesel, not a gasser. With a full aftermarket system, they start to sound like a diesel should.

I dont see how the stock LMM could get any quieter. Most everybody wants there truck to sound somewhat like a diesel, not a gasser. With a full aftermarket system, they start to sound like a diesel should.

I disagree. I think most folks don't want a diesel, because of three things: the sound, the smoke, and the smell. Fortunately, all three of these issues have been addressed. Hopefully, folks will catch on, and we will have more diesels on the roads. I'm not talking just trucks, I'm talking all kinds of vehicles. We all could benefit from something like this.

I disagree. I think most folks don't want a diesel, because of three things: the sound, the smoke, and the smell. Fortunately, all three of these issues have been addressed. Hopefully, folks will catch on, and we will have more diesels on the roads. I'm not talking just trucks, I'm talking all kinds of vehicles. We all could benefit from something like this.

I gotta agree. While there's certainly a group of diesel owners who want their truck loud, and for the record I don't have a problem with that, I believe there's a silent majority (pun intended:)) that like their truck silent. This site no doubt has a disproportionate number of the former due to the nature of the discussions, but the people I've driven in my truck are impressed by how quiet it is and that it doesn't sound like a stereotypical diesel. Maybe it's just the age group I'm in... ;)

I disagree. I think most folks don't want a diesel, because of three things: the sound, the smoke, and the smell. Fortunately, all three of these issues have been addressed. Hopefully, folks will catch on, and we will have more diesels on the roads. I'm not talking just trucks, I'm talking all kinds of vehicles. We all could benefit from something like this.


X3...... The only reason I considered a diesel was the quieter less stinky tech - And now I will stay for the sheer power and longevity......:cool:

Ford PS noise SCARES me.........

:eek:

I firmly believe the DPF is slowly killing these trucks and made my mods with getting more longevity out of the Duramax. Mileage is a big consideration but I am driving a 7,000 lb. truck not a Honda Civic.
All that having been said ( morning coffee ) I would do it again in a second !! Pick a vendor or PM me if you want a recommendation on a few

X2. I have no smell, just the right amount of sound, very little smoke, no watching mpg's going from 17 to 10 while doing a regen, a much much better running truck, 20 t0 21 mpg at 70 mph instead of 16 to 17, since installing a magnaflow turbo back stainless exhaust. I'm with you Nate. Thanks for the excellent customer service.;):):grd:

I was talking to a representative of dodge and ford and he said that if one of their customers was to buy from them and load a tune and say they blew it up of some other serious waranty issue they would just (One time Only) short out the computer so nothing would be able to be traced and manufacture would cover the issue. My Gm man was told about what I could get accross town and he said they could do the same thing if they had to. Take that for what it is worth.

I was talking to a representative of dodge and ford and he said that if one of their customers was to buy from them and load a tune and say they blew it up of some other serious waranty issue they would just (One time Only) short out the computer so nothing would be able to be traced and manufacture would cover the issue. My Gm man was told about what I could get accross town and he said they could do the same thing if they had to. Take that for what it is worth.
So did you find out how to short it out properly?:D

no I did not find out the proper way to short out the computer but I do know a power surge like from boster cables or crossing a wire going to the compter will do the job. At least on older vehicles. My buddy has a repair shop and has a couple vecicles come in with bad computers and the customer was either trying to work on it or tryed to jump start it and fryed the computer. I am sure any good tech could tell you how to short it if need be. This of course would have to be a last resort and a sure bet on warranty coverage otherwise you might be buying a computer also.

Well, I'll post my DPF delete experience and how I arrived at the decision to delete my DPF. I had Three Chevrolet trucks prior to my current '08 LMM and all of them went beyond 100K before having any significant drivetrain issues. Before I bought my '08, I thought people were making too big of a deal out of the DPF, but after having the truck for only a month, I couldn't stand the DPF. I hated watching the mileage drop like a rock during regen and to me, the truck didn't even sound like a diesel. I made the decision to go with an MBRP 4" turbo back system and EFI Live. The MBRP system does have a muffler and I like the sound, it's not loud at all, it just sounds right, to me. I have relatives with straight piped trucks and that is too loud to me. As far as smell, yes it does smell like a diesel now. I get a little soot residue on the exhaust tip and the right rear corner of the bumper. No big deal to clean off. It only smokes if I put foot to floor from just about a dead stop. The tune I run with EFI live is pretty mild and I will more than likely set the injector pulse and timing tables back to stock for an upcoming 3000 mile trip I have planned towing 7,000 pounds.

As far as the legality of tampering with emission equipment, yes removing the DPF is the very definition of tampering with emmisions control equipment. BUT, in my way of thinking (and I could be mistaken so feel free to correct if I am wrong) but the DPF is there to collect soot and then burn it off. The soot produced appears to be mostly elemental carbon. The DPF collects and burns, or oxidezes the carbon thus turning it into CO or CO2 gas. So, in order to get rid of what some consider to be unsightly soot, we are forced to burn more diesel (use more crude) and produce MORE greenhouse gasses. Seems to be a flawed concept to me.

One other thing I did to my truck was to delete the EGR. I removed the whole EGR cooler and blocked all exhaust flow back to the intake. I didn't do this until 20K miles or so and I should have done it sooner. The EGR manifold was really nasty. The purpose of the EGR is to lower combustion chamber temps and lower NOx emissions (I think) But shoving dirty exhaust gas back into the intake does not make sense to me. By removing my EGR cooler, I have also eliminated the possibility of EGR cooler failure from dumping coolant down the itake and physically ruining the engine. It also takes some of the stress off of the cooling system.

Take it off. The truck is MUCH more fun to drive. Then you can take your musket gun and hunt wascily wabbits!
http://i55.photobucket.com/albums/g129/chad_s_johnson/Musket_2.jpg

Take it off. The truck is MUCH more fun to drive. Then you can take your musket gun and hunt wascily wabbits!
http://i55.photobucket.com/albums/g129/chad_s_johnson/Musket_2.jpg
I really needed to laugh this morning and this pic is very good stuff.
I can't wait to pull mine off and hunt the big eared criters myself.

juneau92 and DanW- When the DPF is deleted, the truck is not LOUD. Most people dont want loud, they just want to be able to hear a little something when they get on the throttle. If you like it as quiet as possible though, definately leave it stock.

With aftermarket exhaust
http://www.youtube.com/watch?v=Og9gkrrxt-k

Without
http://www.youtube.com/watch?v=xNdS5wrdr_k&feature=related

I think we need to clarify what people are calling "loud" in regards to diesel engines. Are they talking engine noise or exhaust noise. The duramax engine is a very quiet "engine" in regards to diesels, compared to lets say powerstroke. I think by removing the DPF and going with an aftermarket exhaust you can increase the "exhaust" noise, but this is usually only really noticed when you put your foot into it. Smell and smoke, thats a totally different issue. All I know is, with a d-max you can go through a drive thru with without turning of the truck and my 05 p-stroke there's no way, and it has noting to do with exhaust.

Well said, great post.

Point taken guys. I do understand the difference between diesel engine noise and exhaust noise. But personally, I prefer neither. Hence my choice of a Duramax with stock exhaust.

Point taken guys. I do understand the difference between diesel engine noise and exhaust noise. But personally, I prefer neither. Hence my choice of a Duramax with stock exhaust.

x2

Not losing a 100,000 mile drivetrain warrantee doesn't hurt, either. :)

I got a 4mpg increase in the combined highway/city, and a 5mpg increase on the highway @72mph. I've posted my calcs a while back. For the first 5 years, I will save about $8K in fuel costs, cost me only $700 to make the change. I'll take my chances on a motor/tranny combo that is almost unchanged (except for improvements) over the last 8 years. Best mod ever done to any one of my vehicles, without a doubt. Chris


Yep...I got the EXACT SAME mileage increase results. I also added a 100hp tune, and the truck really responds now. When driven normally, it still has that lazy deezel acceleration and driving attitude...UNTIL you put your foot into it....THEN this fooker hauls ass.

Surprises anyone who is next to me....and especially those expecting to cut me off while in the fast lane. Had a MB try to get around me and I totally closed the door on him (he was cutting everyone off behind me...until he got up to me).

Went with an S/S ATS Diesel Performance Exhaust for the long bed '07 that fit my short bed '08 perfectly (after cutting out about 18" of the straight section). It's their single exhaust system #66400. Very cool install, let me tell you!

BTW, the MBRP did not fit my truck well at all. IT has NO rise to properly clear the trans crossmember...where the ATS does and clears the crossmember perfectly.

The MBRP system caused a lot of frame/crossmember interference and "banging" when accelerating and decelerating. It was a PITA, and I was glad to trash that system to go with the ATS. Also the ATS kit is built here in the USA and out of a 400 series Stainless Steel, instead of China (or Canada) and out of 303 Stainless (much softer). The muffler is a verrrry cool polished stainless unit too.

One other thing I did to my truck was to delete the EGR. I removed the whole EGR cooler and blocked all exhaust flow back to the intake. I didn't do this until 20K miles or so and I should have done it sooner. The EGR manifold was really nasty. The purpose of the EGR is to lower combustion chamber temps and lower NOx emissions (I think) But shoving dirty exhaust gas back into the intake does not make sense to me. By removing my EGR cooler, I have also eliminated the possibility of EGR cooler failure from dumping coolant down the itake and physically ruining the engine. It also takes some of the stress off of the cooling system.


Got 5k on mine and would like to do the exact same thing. Do you have some pics where the EGR block-off should be installed....as well as removing the EGR manifold & cooler? Or, how about a link somewhere?

Thanks for this heads up!!!

Take it off. The truck is MUCH more fun to drive. Then you can take your musket gun and hunt wascily wabbits!
http://i55.photobucket.com/albums/g129/chad_s_johnson/Musket_2.jpg


Thats just "flippin" hillarious !!!!!!!!

x2

Not losing a 100,000 mile drivetrain warrantee doesn't hurt, either. :)

While not losing your warranty is commendable, I think you place undo faith in GMs systems engineers. I personally would rather have a well tuned diesel that didn't gobble extra crude to burn off particulate and push fuel into my oiling system.

I would be willing to bet that a DPF deleted truck will live more happily over the duration than a DPF equip truck.

If safety and lack of smell is what you want, you should leave it on and maybe start a DPF non-deleted thread.

I know I will probably catch hell for this and I am kinda contradicting myself since I own an LMM. But, people have always said you never buy a vehicle the first year they are out. Its usually said because that way you know what problems the vehicle has and gives the manufacturer a chance to iron them out.
Same goes for a new emmisions part or any other equipment. Its the first year the dpf has been out. There may or may not be any problems with it. Just to let you know, I took mine off just to be sure. HAHAHAHA

I know I will probably catch hell for this and I am kinda contradicting myself since I own an LMM. But, people have always said you never buy a vehicle the first year they are out. Its usually said because that way you know what problems the vehicle has and gives the manufacturer a chance to iron them out.
Same goes for a new emmisions part or any other equipment. Its the first year the dpf has been out. There may or may not be any problems with it. Just to let you know, I took mine off just to be sure. HAHAHAHA

http://members.cox.net/atoby2/misc/Wedgie.gif

Can the DPF be deleted and restored back to stock if you have any warranty issues without storing a tune in the computer?

You can remove the DPF with out a tuner. However it will throw serious codes. If you run the truck to long with the codes it will go into safe mode and take a crap. So no!
HAHAHA you do need a tuner like EFI live, PPE or QUAD to eliminate the dpf and eliminate codes.
DO IT...ITS FUN

Blackhatch- You can put your stock exhaust back on and return the programming to stock. We have had several customers do this and bring their truck into the dealer for warranty work without any issues at all. If its something unrelated, dont worry about it. If you melted your engine, they are probably going to dig a little deeper.

Thanks. I am a bit worried that stingy as GM will scam my ECU to see if there has been a tune or modification in there to invalidate my warranty.

Is the DPF delete mod inside the ECU recorded and therefore viewable by the dealership when it comes to crunchtime?

Good question. I think if they really want to find out, they can. If you have a dealer that is an @ss, find a different dealer. There are good ones and bad ones out there.

With aftermarket exhaust
http://www.youtube.com/watch?v=Og9gkrrxt-k

Without
http://www.youtube.com/watch?v=xNdS5wrdr_k&feature=related


That top video was with an aftermarket turbo correct?

That top video was with an aftermarket turbo correct?

Yes it is, GT4094 here is a video of the same truck with a stock turbo
http://www.youtube.com/watch?v=-uuLR8cwECM

Good question. I think if they really want to find out, they can. If you have a dealer that is an @ss, find a different dealer. There are good ones and bad ones out there.

But the problem, as I understand it, is that once you hit a bad dealer and they flag your warranty as voided, you're screwed. It will forever be identified in GM's system as having had a tuner installed. And, unless 10 valid GM ECM updates come out and are applied after you've installed a custom tune, the footprint of your non-authorized tune will be detectable.

im thinking of simply putting an electric exhaust cut out before the cat, and i am wondering if anyone knows if that would be an ok idea without getting a dpf delete or if anyone has heard of someone doing this.

It would trip the DPF code.

im thinking of simply putting an electric exhaust cut out before the cat, and i am wondering if anyone knows if that would be an ok idea without getting a dpf delete or if anyone has heard of someone doing this.

I have a customer that did this on his truck, it did throw him into limp mode as he was running it with stock tuning. We sold him a PPE and got rid of his problems right away.

ok cool, i do have a banks 6 gun tuner that is capable of deleting the codes, i dont plan on running open all the time, would it still be ok to just add that cut out?

Check that tuner with banks. It may not clear the DPF codes. If it does clear it, it will probably come right back on.

If there are serial numbers and so on attached to the ECU - why not buy an ECU from a donor LMM or GM directly and load all the tunes/ dpf delete onto that extra ECU? Then if you gotta hit the factory take the one that came with the truck re-install it and hook the dpf back up. If it's crazy expensive then it would only be worth it to some people... but that's gotta be a viable option. Design a dpf delete kit that can be reattached fairly easily. ECU's are just a bunch of plugs and some screws in a simple hiding spot... I would think it's worh it.

New ECU's that are programmed for your truck are about $200. Lots of Lmm owners are doing just that. The only problem with going this route is that if you end up having a warranty issue, your DPF regen cycles will not match your odometer/hour meter. But like lots have posted here, GM most likely will do the warranty work IF it was not related to aftermarket performance upgrade. If it is, then hitting the wreckers for donor motor/trans/drivetrain parts are the next best bet.