A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more!

I bought a 2025 GMC Sierra 1500 Denali Ultimate Duramax and overall, I love the truck. It's an absolute joy to drive, and the engine is fantastic. Unfortunately, with barely 3k miles on the truck, I've had …

Mar 17, 2025 · Hello, new to this forum. Thinking about purchasing a 23 or 24 GMC Sierra with the 3.0 Duramax. I drive about 10 miles each way to work, mixed freeway and city. Reading about several …

Dec 21, 2024 · 2025 3500, Duramax 6.6 After stopping to refuel the check engine light came on again, took the truck to the dealership, where they updated the software and the light is off, hopefully it is …

Dec 11, 2021 · I’ve been looking to get a new truck and was looking at the GMC AT4 1500 with the 3.0 Duramax and was wondering if there are any problems with this motor and what else would I need to …

Mar 18, 2024 · Hello folks, I successfully repaired my coolant control valve at home, no dealer fees, or WAITING for spare parts required…My 21 Sierra started throwing the P1098 code at 63k miles and …

Nov 16, 2023 · This applies to ALL 3.0 duramax's and newer 6.6 duramax's too. NO. It does apply to all LM2's. It does not apply to LZO's Full size SUV's are still using the LM2. 2023 and 2024 1500 …

Dec 6, 2020 · I’m working on this 2015 Chevy Silverado duramax (I’m new too DEF systems) and has on the dash “exhaust fluid quality poor” and “speed limited to 4 MPH”. I have replaced def injector, …

Jan 21, 2025 · We are new to the Duramax. We’ve always had Chevy with gas engines, but now have horses to haul. We bought a new 2025 3500 Duramax at the beginning of December. We were …

Nov 25, 2024 · I have a 2022 3500 dually Duramax now and haven't had any problems so far and was wondering if there is any advantage to buying a new truck? Thanks in advance for any pointers! Roy