Just bought a LMM with dpf delete and no programmer. It is getting horrible mileage...like 8-10mpg, is this due to not having the regen turned off. I see that everyone says that you need to turn it off, but i havent heard what happens if you dont. New to the Duramax since i just sold my 06 cummins on friday.

thanks for any info:)

There is no way to do that, you have to run a programmer to Delete the DPF. If you don't, you will end up in limp home mode.

And congrats on the new purchase, Welcome Aboard!

I have been running my truck with without a dpf and no tune for about 27,000 miles with no problem. When the sensors are unplugged it does not regen.

I have been running my truck with without a dpf and no tune for about 27,000 miles with no problem. When the sensors are unplugged it does not regen.

WOW! and no CEL?

No, I do have a check engine light. Other than that no problems.

Mine seems to run fine too, the last owner didnt have any issues with it either. Im just worried now, chad (alligator performance) said that the truck may go into limp mode. I think im gonna order the PPE on monday.

Thanks for you help Chad, look forward to doing business with you.

seems like no one really knows exactly how these trucks work....this is the first i have heard of running a delete with no tune, everyone on here has been sayin it cant be done but obvouisly it can be done, Im guessing with no tune their will be no improvement in economy, but it should have more power with less restriction even so, cowboy56 is it worth doing for those who dont want to have a tune which is now traceable? is there any hp improvement, mpg?????

I guess you could use a piece of black electrical tape over the CEL :shake:
It drive me crazy looking at that light on! You can be our ginie pig and let us know if it goes into limp or not.

seems like no one really knows exactly how these trucks work....this is the first i have heard of running a delete with no tune, everyone on here has been sayin it cant be done but obvouisly it can be done, Im guessing with no tune their will be no improvement in economy, but it should have more power with less restriction even so, cowboy56 is it worth doing for those who dont want to have a tune which is now traceable? is there any hp improvement, mpg?????

That is the first time I have ever heard that. I have several (i.e. dozens) customers that have tried that and got stuck in limp home mode. They did nothing fancy, just removed the DPF and drove. Limp mode has happened as early as 30-40 minutes after installing the pipe, to 2,000 miles, but I have never heard of anyone getting away with it for that long.

Mine seems to run fine too, the last owner didnt have any issues with it either. Im just worried now, chad (alligator performance) said that the truck may go into limp mode. I think im gonna order the PPE on monday.

Thanks for you help Chad, look forward to doing business with you.

Nice talking to you too!

I drove my truck for 3 weeks after getting the ECM update/recall done on my truck with the CEL on, but never a limp mode. Probably about 1000 miles or so, then I reinstalled my Quad after I felt comfortable nothing was messed up after the recall was done. Made me feel comfortable knowing if a limp mode did occur, my Quad was in the console. Chris

I have also been running the banks six gun on my truck for around 20,000 miles. The mileage came up a little after I removed the dpf but it didn't go up like I thought it would. Making sure the sensors are sealed is very important. I have went into limp mode once because i didn't have them taped up. That was a few thousand miles after I took the dpf off. I am buying a quad tuner so that I can shut my check engine light off and have my remote start again but I'm not planning on downloading a tune.

well id like to do it but i wouldnt want to be messing around with limp mode, and when ur talking sensors is it just the ones that tap into the dpf itself or is their more somewhere else? No power imrovement?? These things are suppose to have more than a lbz, just wondering if they both had same exhaust if it would the diff, and urs is a 08 and mine is 09, would that change anything far as being able to do this, diff ecm?

well id like to do it but i wouldnt want to be messing around with limp mode, and when ur talking sensors is it just the ones that tap into the dpf itself or is their more somewhere else? No power imrovement?? These things are suppose to have more than a lbz, just wondering if they both had same exhaust if it would the diff, and urs is a 08 and mine is 09, would that change anything far as being able to do this, diff ecm?



Yeah, there are three sensors that plug into the dpf. If they get water in them they will start to read funny and could put you into limp mode. The fix is simple though because all you have to do is dry them off or clean the corrosion off and tape them up.. The next time you start the truck the limp mode will be gone. The power improvement is hard to tell but I know it didn't hurt it by taking off the exhaust. This truck definitely had way more power than my LLY before I added the six gun. It's hard to feel an extra 20 or 30 horse when you already have 365. I don't see any reason why this wouldn't work the same way on an '09.

Just bought a LMM with dpf delete and no programmer. It is getting horrible mileage...like 8-10mpg
Welcome to the low mileage world of the LMM. I used to bitch about it but I forced myself to learn to accept it.

Welcome to the low mileage world of the LMM. I used to bitch about it but I forced myself to learn to accept it.

Yeah it deffinetly sucks, i keep hoping that someone gives me the cure. I was thinking it would be equivelant to my 06 cummins...guess not. im gonna try a PPE.

dmaxin22....that lift and 35''s is the main reason i would bet for poor mileage....mine came new with 245's and it was actually pretty decent on fuel until i put on true 33's, Im not so conerned about mileage but i would like more sounds from my truck and more get up and go

After i deleted the dpf i only made it about 1000 miles until mine went into limp mode i had an edge juice with attitude so i just cleared the code while driving and it temporarily would drive normal

I drove a few thousand miles before I got my tuner with now problems whats so ever... I just un plugged and capped all the sensors off...

what is the reason of removing the dpf? Mpg,power and how much if so?

If you remove your DPF, you will see much better mpg. It also opens up some power.

If you have any questions let me know. We have kits starting as low as $600.

I have around 35000 miles on my truck with no DPF and an older edge evolution with out a delete file. Check engine light is on, but trouble free since i removed all of it. Ran a quad for several months but looking to change to something alittle different. My main complaint with the removal with out a programmer that cuts the function off is....i have a check engine light, a tire light due to aftermarket tires i refuse to put 70psi in and a tow/haul light.....looks like a airplane cockpit.....

all does lights on don't bother you? Damn I go crazy, I guess I wory too much or just getting to stinkin old.shake:

hahaha....yeah all the lights do bother me....just havent saved up enough money for a new tuner to cut off the dpf function....and i miss my remote start also, to warm my truck up on these cold mornings.

Does the banksiQ have the capability of DPF deletion? I know it can clear code once problem is resolved. And who makes a COMPLETE tubo back kit WITH a muffler.

I have around 35000 miles on my truck with no DPF and an older edge evolution with out a delete file. Check engine light is on, but trouble free since i removed all of it. Ran a quad for several months but looking to change to something alittle different. My main complaint with the removal with out a programmer that cuts the function off is....i have a check engine light, a tire light due to aftermarket tires i refuse to put 70psi in and a tow/haul light.....looks like a airplane cockpit.....

Just have your dealership reprogram the tire pressure sensor system to the pressures you want to run in your new tires. Mine did it for about $25 and now I can run 40 to 50 psi without lights coming on.

seems like no one really knows exactly how these trucks work....this is the first i have heard of running a delete with no tune, everyone on here has been sayin it cant be done but obvouisly it can be done, Im guessing with no tune their will be no improvement in economy, but it should have more power with less restriction even so, cowboy56 is it worth doing for those who dont want to have a tune which is now traceable? is there any hp improvement, mpg?????

Has anyone tried to hollow out the Dpf and leave everything connected? Would this eliminate the need for Delete Tune? I'm running a Banks iQ which at this time does not have the ability to turn of DPF. I would love to run a Turbo back Ex, however I would not be able to look at a CEL all the time.

Mine seems to run fine too, the last owner didnt have any issues with it either. Im just worried now, chad (alligator performance) said that the truck may go into limp mode. I think im gonna order the PPE on monday.

Thanks for you help Chad, look forward to doing business with you.you're gonna love it and chad's a great guy to deal with

Has anyone tried to hollow out the Dpf and leave everything connected? Would this eliminate the need for Delete Tune? I'm running a Banks iQ which at this time does not have the ability to turn of DPF. I would love to run a Turbo back Ex, however I would not be able to look at a CEL all the time.


Would not be a wise thing to do, the DPF is very expensive to replace, even if hollowed out and left connected you will be getting CEL's due to the pressure differentials before and after DPF being out of wack. Much cheaper to just replace entire exhaust system and get a tuner that turns off the lights. Chris

Does anyone know if there is a trade up for Edge. I have an Edge EVO and I would like to delete DPF and I guess I need to update to Edge Race.

dmaxin22....that lift and 35''s is the main reason i would bet for poor mileage....mine came new with 245's and it was actually pretty decent on fuel until i put on true 33's, Im not so conerned about mileage but i would like more sounds from my truck and more get up and go

After 4" Cat back stainless Magnaflow exhaust (thanks Alligator), EGR block off plate. A used PPE hot +2 e.t. race, and being able to get 315's (35" tires) under my truck with no lift, I'm able to get 22MPG on hiway. Best in stock form was 16-17MPG. At 70MPH the truck is running @ 1600RPM, which is coincidentally the max torque range of the LMM. In town is a different story due to more rolling mass when starting from traffic lights, but when out on longer trips, your gonna see better millage with larger tires (assuming pretty much empty loads).

sledog how does it sound with the DOC (cat) on and no DPF? Did a muffler come with that kit? I considered leaving the cat and deleting the DPF with no muffler. I don't want it resonate inside.

sledog how does it sound with the DOC (cat) on and no DPF? Did a muffler come with that kit? I considered leaving the cat and deleting the DPF with no muffler. I don't want it resonate inside.

mine has no cat, just a muffler included in the kit. The magnaflow turbo back kit is the same model for previous years as the mounts and hangers are all in the same location. Its definitely louder than factory at idle and acceleration but not annoying. On hiway there is a very small amount of resonance inside. Very easy to talk over at normal talking levels...I don't even notice it anymore. I was told that the larger exhaust you go with, the louder the resonance will be.

22mpg with 35's is very good, running 33's on 09 with dpf still in, best hwy mileage yet is 15, thats cruise set at 65-68 no load.

new to site... was trying to find photo of your 08'LMM w/ 295/17. Not sure if im overlookihg it or perhaps you don't have one posted

Robert welcome to the site. Click on his active garage if you are referring to the guy above you.

Nice truck! Mine has factory 16's.. Your 17'' definately seem more proportoinate to the truck... Thanks!!!

Nice truck! Mine has factory 16's.. Your 17'' definately seem more proportoinate to the truck... Thanks!!!

If you have a few min, take the time to fill out your signature in your "user CP" area so we all know what year/make/etc you have Robert.

After 4" Cat back stainless Magnaflow exhaust (thanks Alligator), EGR block off plate. A used PPE hot +2 e.t. race, and being able to get 315's (35" tires) under my truck with no lift, I'm able to get 22MPG on hiway. Best in stock form was 16-17MPG. At 70MPH the truck is running @ 1600RPM, which is coincidentally the max torque range of the LMM. In town is a different story due to more rolling mass when starting from traffic lights, but when out on longer trips, your gonna see better millage with larger tires (assuming pretty much empty loads).

Sweet, glad it worked out. Thanks again.:cool: