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  1. General Discussion
    Hi all, I just picked up a new webasto coolant heater and 7 day timer for my 2020 GMC AT4HD. Has anyone done this install on their 2020+ L5P’s? Looking for any insight on whether I should get it professionally installed or do it myself as a DIYer. The cost of labour is practically the same...
  2. General Discussion
    Does anyone know if a air intake is worth it for better gas mileage and power? I have a 2020 Silverado 2500 diesel.
  3. 911 Problems Forum
    2020 duramax l5p ring when accelerating on and off. 2020 l5p ring/squeak
  4. Parts For Sale
    I have a 2020 Chevy 2500 long box original diesel tank for sale 14.156 miles on the tank. Nothing wrong with it, too out the original and installed a Titan tank. Have ran Hot Shot's EDT in every fuel tank since 6000 miles. $200 or best offer. Will work with buyers for shipping. Located in...
  5. Drivetrain
    There is a clicking noise in the steering wheel that is easily reproducible. Dealership replaced some shaft in steering column, drove away with the click. Have reported problem problem to dealership multiple times. See my video: Does anyone else have this problem? --Mark
  6. 2020+ LM2 Duramax Powertrain
    My son-in-law bought a brand new Chevy 3500 CC Long box two weeks ago. exactly one week after he got it (1000 miles on vehicle) it started making horrific knocking noises then shut off and would not start. Towed to dealer and they could figure it out (no codes) they drained all fuel and...
1-6 of 6 Results