quote:

Originally posted by Woody B:
I'm not a fan of the emission junk on modern diesels, but I suspect you, or whoever is doing the work is just throwing parts at it instead of properly diagnosing and repairing the problem.

P2BAD doesn't indicate a failed injector. It indicates the exhaust fluid or selective reductant catalyst isn't controlled NOx correctly. It "could" be a bad DEF injector, a leaking indirect injector or any number of other problems. Were all the post repair procedures followed with NOx 2 was replaced? Why was the NOx sensor replace, AND the the DEF tank cleaned and drained? I suspect whatever is causing your current DTC was also causing the problem a couple weeks ago.

I'm a former GM World Class Technician. (GM Master Technician in multiple areas) I left the Chevy dealership in 2016, but had several local dealers sending me their problem Duramax vehicles because I'd actually repair them instead of just throwing parts at them.


My somewhat educated guess. Nothing was wrong with NOx2. The def injector is leaking, and has soaked the brick in the SCR catalyst with DEF. The necessary regeneration necessary after replacing NOx2 got the SCR hot enough to dry it out for a few days. It takes time and patience to properly diagnose this stuff. It also takes time and patience to verify repairs.


My suggestion, do the delete. Don't cut anything off remove everything in one piece and keep if for future reinstallation. Re install it when you go to sale the truck.

quote:

Originally posted by Holytown:

Thanks for all the info Woody. Do you have an opinion on which delete kit to get, and where to get it from?

quote:

Originally posted by Floyd Staggs:
I bought a 2011 2500 HD when the DEF first came out. In the first 4 years I had 17 service calls at the dealership for warranty work. Each glow plug was replaced, one at a time, a couple of injectors, both nox sensors, a stabilatrak sensor, fuel filter housing cracked and a TCM had to be replaced. I have had no more issues accept having to replace the oil pressure sending unit on my dime. Once all that crap was done it's a great truck.

quote:

I bought a 2011 2500 HD when the DEF first came out. In the first 4 years I had 17 service calls at the dealership for warranty work. Each glow plug was replaced, one at a time, a couple of injectors, both nox sensors, a stabilatrak sensor, fuel filter housing cracked and a TCM had to be replaced. I

quote:

Originally posted by Canted Valve:

quote:

I bought a 2011 2500 HD when the DEF first came out. In the first 4 years I had 17 service calls at the dealership for warranty work. Each glow plug was replaced, one at a time, a couple of injectors, both nox sensors, a stabilatrak sensor, fuel filter housing cracked and a TCM had to be replaced. I

That's testament to today's GM QC. They'll get no more money from me.

quote:

How can that even happen?

quote:

2011 was a new model year and I knew better than buy one but I blew up my '03 on the way to a race and got towed into a dealership and an hour later drove out with the new one. Most expensive drag race I ever attended.

quote:

Originally posted by Canted Valve:

quote:

2011 was a new model year and I knew better than buy one but I blew up my '03 on the way to a race and got towed into a dealership and an hour later drove out with the new one. Most expensive drag race I ever attended.

Went through a similar scenario as you going back and forth to the dealer for warranty work. Back when the new Dodge Intrepid came out the wife wanted one. Since she worked for her money she got one. To Chrysler's credit, they willingly fixed it many times and it, like yours, finally held together.