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Several times while driving my 2021 LM2 diesel truck I've experienced a loud bang inside the truck and feels like it's either the transmission shifting on the engine, not sure. The last time it happened my wife said did you hit or run over something. Anyone else experiencing this problem? Just...

https://www.autoevolution.com/news/the-beloved-duramax-engine-has-just-gotten-killed-what-will-gm-use-in-its-place-238275.html

My 2021 GMC Denali has approximately 18,000 miles on it and the engine is making a rattling sound under light acceleration. This just started has anyone else experienced this issue? This sounds like pre-ignition in a gasoline engine.

Has anyone had their fuel injector pump fail or replaced? Watched a youtube video stating it will most likely need to be replaced at 100,000 miles.

I was watching a TFL Talk youtube video doing a walk around at the Detroit auto show and noticed that a GMC truck with a Multi-Pro Tailgate has a black plastic overlay on the upper half of the tailgate. Has anyone seen this before? I'm curious where I could buy this overlay on the tailgate to...

I haven't seen this TSB before. If anyone can post the link to this bulletin it would be appreciated. General Motors is addressing an issue that may cause check engine lights on 2020/2021 Diesel Silverado and Sierra pickups. Both 3.0L and 6.6L Diesel Duramax engines could have an error...

I drove approximately 10 miles around 65mph after the message came on and the message went out after a few miles on the highway. Got home I now have a yellow engine symbol in the lower right corner of my instrument cluster staying on. When the message came on I couldn't change to the screen...

I just bought a new 2021 GMC Sierra 1500 Denali 4x4 crew cab and really happy with the power the 3.0 diesel has. I'm concerned about the def fluid since I rarely put over 7,500 miles on my vehicles per year. Is there someway to drain the def tank on the truck so that I can put fresh def fluid...