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I just spoke with a GM Diesel Tech I worked with. He said GM now says a 36-39 Cetane rating is okay. I now teach at an Automotive Technical High School, and our Book states 45 Cetane. Now our book is copyrighted from 2023, it could be outdated. The reason would maybe be the higher fuel pressures...

15 years ago, 43 was the standard for # 2 passenger vehicle diesel, now I cant find anything over 40? weird

Try a different brand of fuel.

Has anyone measured the cetane number on the fuel they been getting, GM recamends cetane number of 44, I cant seem to find anything over 40, then I played with the sample fuels I have and added Archoil, Amsoil, Hotshot, and added 1oz of the Archoil, 1oz of the hot shot 3 oz of the amsoil to 2...

5100 s are height adjustable for the front? I levelled my truck back in 2021 when I first got it, 2" front and 1" rear, so if I get the 5100 front struts they are adjustable height and I can get rid of the top spacers completely?

Had an oil leak on mine was the front engine oil gallery plug I re-sealed it, re-sealed it all good

I have a 2021,56k miles , used and tried different kinds DEF , same results on all, I now use Walmarts brand, $8 for 2.5gals, I do have a stuck DEF gauge always full? Had the reflash for it no change? Stuck on full is the good part, I just add every 2000 miles or so keep it full to top, not...

Changed mine at 40k, and 43k now, all good easy job, except for checking the level pain in but, but they all have it this way now, I did switch to Amsoil Signature series Syn trans oil, all good no changes and love the way this 10-speed shifts, best trans I have had in my lifetime. hope all...

On the capless filler neck there is a vent from inside to outside just below the flapper valve, If you try to top off your tank too much fuel will be forced out of the vent and on the ground. As for the warranty claim ? I have had mine on since the first month of my 2021, 36K no troubles at all.

I have a 2021 RST 3.0 4 door, my tires are 275/60/R20, did you go for the 285/65/R20? just wondering how they fit? i have 36 k and Duratracs about done now

But you do get controled burn/high octane.

Rodents have been chewing insulation on cars/trucks for 45 years, so much for soybean oil insulation.

Not if you changed the factory height and the cv boot ripped, lack of lube, its 100% on you now,

Looking for sugestions and of mounting ideas and or fast access safes or box for a ccw/handgun in the truck

Thanks I currently have power mirrors, manual fold, I miss power folding like I had on my previous truck

Looking to buy power folding standard mirrors and harnesses for someone who wants to recover some cost of the tow upgrade mirrors.

You have not had your reflash done yet? ??

Hello, Is there a way to open the tailgate with a dead battery? Not mine but as jumping someone else's with a jumper pack I keep in a swing box with a BAK hard top bed cover, was wondering if I had a dead battery could I gain access to the jumper pack? Maybe find a place inside the truck for it...

If I remember its approx 2.0 hours flat rate Customer Pay time. for Filter and fluid change, $approx $110 and filter and gasket if needed plus fluid (8Quarts) Hard to think it would be anything over $500 with a high est?

Thanks Again, hopefully the camera helped you if it was not your fault. And thanks for the tip for the power feeds fuse.