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 …

May 7, 2025 · Well, my 2025 GMC with only 900 miles has a failed transmission. I had to have it towed to the dealer. The tow truck driver commented that he had never picked up a truck with …

Jun 21, 2023 · Hello everyone, I have been trying to decide diesel vs gas pick up and since you guys have experience, id like to gather more real life opinions on this topic. Here is my profile: …

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 …

Jan 31, 2022 · Truck has been in dealer multiple times. I’ve stopped at multiple dealers across the country and it’s bound to go to the dealer tomorrow night as the reduced power light came on …

Jan 17, 2024 · Service emissions with check engine light along with speed limited to 65mph in 175 miles popped up the other day. Truck seems to be running fine. Took to local GMC dealer …

Mar 26, 2013 · A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. Come join the discussion about modifications, towing, classifieds, …

Jan 22, 2021 · Hi, just purchased a 2021 At4 3.0 diesel. Less than 300 miles check engine light comes on and dashboard says “ reducing engine power”. Went to dealership...

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 …

Feb 2, 2024 · Coolant Flow Control Valve Actuator Harness Connector Corrosion November 24, 2020 The 3.0L Duramax diesel engine (RPO LM2) on some 2020-2021 Silverado and Sierra …