Jun 23, 2023 · Here to learn a little about my 2024 GMC 2500 with the 6.6 gas engine and the truck in general. I retired and this is only my fourth GM product in 52 years of driving.

Mar 28, 2025 · I bought a new 2025 Silverado 2500HD with the 6.6 gas engine. Everything I researched said the fuel economy was 14-16 city/ 17-18 hwy, but after driving it for 3 weeks …

Nov 9, 2019 · Anyone have a new 2020 HD with 6.6L gas engine? I'm curious what kind of gas mileage you have been getting, particularly when unloaded. Thanks!

Jan 26, 2023 · GM's new 6.6L L8T gasoline V8 engine is a cast-iron unit with aluminum heads that delivers a stout 401 horsepower and 464 ft-lb of torque in heavy-duty models of the …

Nov 6, 2023 · Thank you. That’s about what I do. Although I used to run a ‘01 2500HD with 6.0 until it told me to change. 213k before I sold it and never a problem. But that was a much …

Dec 20, 2024 · Beginning with the 2020 model, the 2500's stopped using the 6.0 and introduced a 6,.6L gas (rpo LT8), and still with the HD version of the GM 6 speed. The 2020 diesels …

Dec 1, 2023 · 2021 comes with only 1 gas engine, the 6.6L. It replaced the 6.0L engine The L8T (6.6L) does not use GM fuel saving technologies such as Active Fuel Management (AFM), …

Feb 12, 2024 · Hello all. Wanted to introduce myself and express my happiness with the 6.6 gas in my 2021 2500HD double cab long bed 4x4 auto WT. Truck has performed well for my …

May 30, 2023 · I am on the list for a Chevy 2500 Express Van with a L8T 6.6L gas engine & 6sp transmission. Doing research on this engine and it seems quite a few people complain that it …

Mar 3, 2020 · However, my question to y'all is what if any feedback do folks have on this new gas 6.6 L V8 that is replacing the tried and true 6.0 L V8 engine that Chevy/GMC had for years in …