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I have a '23 Sierra 1500 CC SLT 4wd and X31 off-road packages. I'm looking at a travel trailer that is 24' (29' overall) dry weight of 5,300 lbs and tongue wt of 577 lbs. Per the door tag, GVWR IS 7,200 LBS. max. trailer is 8,800 lbs, TW 880 lbs, and GCWR of 15,000 lbs. The truck loaded will be 6,700 lbs, trailer loaded will be around 6,500 lbs. for 13,200 lbs. I'll be using a WDH. So is this enough truck and what experiences, rigs etc. do you tow? Thanks!

It looks like we have a resolution, The dealer found a DPF pressure sensor wire with the insulation (and harness) chaffed. This was in the back of the engine down low, per the dealer "not in the usual place(s)". Supposedly there's a specific procedure to repair the wire and harness. The dealer will also reposition the main engine harness. Obviously, I have concerns moving forward as this will be our tow vehicle... The dealer was great to deal with even giving me a new Sierra Elevation as a loaner for three weeks.

Update looks like the issue is between one of the DPF sensors and the Coolant-Flow control valve sensor wiring. Evidently, the sensors share a common wire in the circuit and GM is "thinking" there's an issue there. The dealer has completed the diagnostic ladder and is taking direction from GM Tech. Two weeks and counting...

3.0l Duramax with 1,400 miles on it and during normal driving the transmission shuddered going from 2nd to 3rd and went into limp mode with "Service Transmission" and CEL displayed. I was able to pull away normally (it went out of limp mode) after a stoplight. After 3 power cycles, CEL reset, and all was good. Two days and 100 miles later, the same thing happened, and now I have these messages... Messages on the DIC: "Service Transmission" "Service Emissions System" "175 mi Until 65 MPH Max Speed" The dealer pulled the codes and they were for different systems, Trans., emissions, etc. I've read about the wiring harness issue but the dealer has been unable to find any issue with rubbing on the outside of the harness. They've been working with GM Tech and they want to get into the wiring harness looking for a bad connection/broken wire. The truck was built 12/22 and I purchased 7/23. Are there any TSB's for the wiring harness issue(s)? Has anybody else gone through this? TIA.