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2024 HD 6.6 diesel, SLT, X31. NHT max tow package, SLT premium Pkg., Safety pro camera package. the truck was ordered mid-November, order was accepted late November and built the 2nd week of Jan. I was able to find a dealer who accept using the GMS pricing. I had a 2021 6.6 gas but we purchased a bigger 5th wheel and needed more truck. This truck is a beast and have zero issues so far. I had to purchase a new GMC trailering Camera, so if anybody is looking for one that fits a 20-23 HD or 19-23 1/2 ton I have one .

My new AT4X - picked it up yesterday.

Thanks for the reply. It hadn't been done, but I found a YouTube video that showed the extra step and we tried that this morning and it has fixed the problem. This is the video that showed the fix ...

Yea a good oil is all that's really needed nowadays, and there are plenty to choose from. I ran Pennzoil Euro L 5w30 when I had my 2.8 Duramax but another great choice is the Amsoil 5w30 100% Synthetic Diesel oil. Amsoil - https://www.amsoil.com/p/amsoil-5w-30-100-synthetic-diesel-oil-dp5/?code=DP530QT-EA Pennzoil - Pennzoil Platinum® Euro Full Synthetic Motor Oil | Pennzoil

thanks for coming back and posting what fix the problem for you.

Confirmed: evap line on top of fuel tank had a loose connection after the pump replacement. Tightened connection, no faults.

Thanks much Karnut.

305/45 is the way to go for the factory 22's.

There will be a charge. Option 1 I described only applies to the packages they sell via the GM accessories catalog. You fall under option 2.

Thanks, Im pretty confident around vehicles. Just couldnt find much help on the youtube for this job