[Bojax]

the only bad part about this truck and it sucks i would hope they can chip it out in the future . Just thought I would get some opinions on the subject

 

[Burgess159]

You're not the only one. I figure that tuning (and also deleting) is the only way to fix it. It's not just this truck, a lot of newer vehicles (I think) have it. The LML and possibly the L5P Duramax engines have the same problem. I think even my wifes old Jeep Liberty with the 3.7L V6 had it too and that was a gas engine.

 

[AndyZ71]

it's the programming of the drive by wire system. For fuel mileage, and traction control nanny bull ****.

 

[Bojax]

I'm thinking turbo lag

 

[AndyZ71]

Turbo lag adds to the problem, but is a very small part of the issue. All you have to do for an example is turn off the traction control. You can easily tell a difference.

Look up sprint booster. It is a module you put inline with your accelerator wiring, it defeats the the fact that factory programming gives you a certain percentage less throttle than what your foot is doing until you get to a certain RPM. I had one for my Jeep, it was night and day.

 

[Burgess159]

 

[Rockcrawlerdude]

Bojax is tuned already I thought. Tuning doesn't fix it. It just makes it more satisfying when the power does come in

What Andy said is right. Turning off trac and torque mgmt is a huge difference. Turn on exhaust brake/ tow haul, push trac for like five seconds until both trac lights come on. M seems a little more responsive than D as well to me

 

[Ottomaddick]

You're not the only one. I figure that tuning (and also deleting) is the only way to fix it. It's not just this truck, a lot of newer vehicles (I think) have it. The LML and possibly the L5P Duramax engines have the same problem. I think even my wifes old Jeep Liberty with the 3.7L V6 had it too and that was a gas engine.

Forgive the ignorance, what is "deleting"

 

[Burgess159]

Forgive the ignorance, what is "deleting"

Getting rid of the emissions equipment on your vehicle. The first and most common one to do is getting rid of the whole exhaust system; the Catalytic converter, DPF, DEF system and the muffler also. It lets the truck breath (actually this would probably be more like exhale) easier. Opens it up. They replace all of that with just a straight pipe usually, or straight pipe with muffler, like this one from Flo-Pro:
http://dalessuperstore.com/i-238945...e-2016-2017-2-8l-colorado-canyon-duramax.html

The other remaining thing that people delete, but don't always do it right away, is getting rid of the EGR Cooler. That also helps with the breathing. Some people just disable and leave it there, which can be ok. But I believe air still tries to go through it, plus it holds coolant. So, if it ever got a leak, it could leak coolant back into the engine I believe but I'm not positive where the leaked coolant could go. Here is a kit for that:
http://www.xtremediesel.com/oz-tuner-oz-col-egr-kit-egr-race-track-kit.aspx

To do all this though, you can't just rip all that stuff off there. If you do that and then fire the truck up, it's not going to like it. Mainly, the ECM (Engine Control Module) is not going to be happy. It will see those units as missing and put the truck into limp mode, or just shut it off all together probably. You have to get a tuner to tell the computer that those parts still exist, even though they don't. Also, tuning rewrites the ECM and adjusts how the truck runs. If you get the one listed, or their counterparts, you can switch power levels (4 of them) on the fly. And unfortunately, not all tuners do that, you have to get the right one. I know there are a few out there that do it, but I know this one for sure does, from MotorOps who is DuramaxTuner's Canadian counterpart:

http://motorops.ca/duramax/duramax-tuning/2-8l-duramax-canyon-colorado-auto-cal.html

However, many states frown, or scowl, at you if you delete your emissions. They put it on there for a reason, but unfortunately, it can cause issues. As some of our members have found out. And the easiest way to fix it is get rid of it. The DPF and EGR are undoubtedly going to plug up and get full of gunk eventually. Now, that will probably be around 150,000-200,000 miles or more, but it will happen. And that will cost you a couple thousand each probably to repair. The above-mentioned delete items will run you around $1,600 I think, but my math might be off. And that's a 1 time and done. If you do it, you need to get the tuner first and you can turn off the stuff and leave it there, until such time as you can afford to buy the delete items. You should see performance gains, MPG gains, cooler running engine timeps with doing this as well. Should sound better too, even with putting a performance muffler on it.

 

[Burgess159]

Here is a video showing the difference of stock vs. deleted. It is on a 2015 Silverado 2500HD 6.6 LML Duramax, but you get the idea: