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Thanks for the reply, however mine has never done it and started about a week ago. Wondering if the diesel fuel has something to do it so will buy another tank at another station. Have also read that the injectors might be a problem. If I'd had the noise since new I wouldn't be as concerned...

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 agree on being the smoothest powertrain on the market and can't believe Ram and Ford both discontinued the diesel option in their light duty trucks. I hope GM keeps offering the diesel in their light duty trucks and SUVs. Diesel prices have dropped in Missouri and it is now only about 20...

Several weeks ago I noticed diesel fuel below my fuel tank on the garage floor and looked underneath and could see where it appears to have ran down from around or above the fuel tank. Took it to the dealership and was told there is a valve in the fuel filler hose that has to be replaced and...

Yes and understand they also changed to a different injectors than what is on our LM2 engines.

The LZ0 has many upgrades and concerned my 2021 LM2 will have problems in the areas they addressed and improved upon with the LZ0.

The 2022 Detroit Auto Show.

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...

LZ0 Duramax specs announced today, 305 horsepower and 495 pounds of torque!

We will have to wait to see if GM changes or updates the part number for the oil pump wet drive belt for the LZ0 and if not it should apply to all LM2 engines. Apparently the extending mileage and time frame are for the 2023 LM2 engines at this time.

The 2023 LZ)0 duramax is now officially extending their oil pump belt to 200,000 or 15 years and the cooling system is changing.

With the 5-year 100,000 powertrain warranty with the LM2 diesel, I'd say it's a smart move to let the dealer do it while under warranty.

From Pickup Truck + Suv talk, the chief engineer for the design of the LM2 diesel talks about that they are looking into extending the life of the belt.. It's about 5.00 minutes into the video he starts talking about the belt issue and at seven minutes he talks about that their program team is...

If these warnings are ignored and driving continues, maximum speed will be limited further when each of the following counters reaches zero. • 500 Miles to 65 mph Max Speed • 75 Miles to 55 mph Max Speed • 75 Miles to 5 mph Max Speed

This nice to know because I plan on running out the old DEF fluid before adding any more. If the DEF low warnings are ignored and the DEF tank becomes empty, the DIC will display messages that describe the action needed and distance until vehicle speed is limited. For the DEF warning light...

This nice to know because I plan on running out the old DEF fluid before adding any more.

Not sure, my truck has had two updates over the air and don't have a clue what they were. So I guess when I do my next oil change I'll ask about the over the air updates and what they include and let your know.

Not sure if I've had the CNS update done, however over the internet my truck has down loaded some updates that I'm unaware of what they were. I've never had the long crank no start with my truck as of today also.

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...