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I've read that GM has installed the cam sensor shim on a few vehicles and the problem reappeared again. Hopefully after they make the repairs it resolves the problem. Will be interesting to find out if it fixed the long crank no start issue!

The camshaft trigger wheel appears to be bent on several 3.0 diesel motors that have been inspected. During the inspection from what I've read GM is adding a thin shim between the camshaft wheel and chain. GM isn't saying why the camshaft trigger wheels are bent. Just wondering if the...

Bought my GMC Sierra 1500 Denali late April this year and concerned that it will develop this no start issue also. I'd think GM would issue a recall to check all 3.0 diesel engines manufactured in 2021 for this no-start issue in the future.

I suspect they are looking into all the known issues they've had before they resume production and wouldn't surprise me if they halt production of this engine permanently. I've got about 3,000 miles on my 2021 GMC Denali and haven't experienced any issues as of yet and throughly enjoy it.

It would be Interesting to find out what part of parts are not available due to supplier shortage. Hopefully GM gives us an update when they look to resume production.

I hope GM doesn't decide to go the same route as Ford and drop their diesel.

What does Sport mode do compared to Normal mode? Will give it a try and see if it makes any difference in mileage on my vehicle.

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...

Purchased 2021 GMC Denali 3.0 diesel and only have 600 miles on it and love it!