GM quietly added a new Special Coverage, N262552620, for 2021 3.0 Duramax SUVs with a known issue on glow plug #2. It is not a recall, but it does extend coverage to 15 years or 150,000 miles on affected VINs when the #2 glow plug fails and sets specific fault codes. In this article, we break down which Escalade, Tahoe, Suburban, Yukon, and Yukon XL models are included, how this policy compares to the earlier 2020 truck bulletin, and what owners should do if their check engine light comes on wit

The 3.0 Duramax maintenance schedule calls for oil changes up to 7,500 miles, fuel filter replacement at 30,000 miles, and transfer case service every 50,000 miles based on GM HD guidance.

GM has updated its official oil consumption bulletin for the 3.0L Duramax diesel engine, now adding the newer LZ0 platform alongside the LM2. The bulletin explains what oil consumption is considered normal, how towing affects oil usage, and why proper oil level checking procedures matter for diesel truck owners.