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  1. 2020+ (Non Powertrain)
    With no prior warning, 1. Started truck and “service brake” screen comes on. Thought this was odd as I wasn’t on an incline or pulling trailer where sometimes brake auto sets itself. 2. Pressed brake pedal and hit brake button, up pops “engine power reduced” screen and truck is in limp mode...
  2. 01-04.5 LB7 Duramax Powertrain
    I have a 2004 lb7 duramax and all of a sudden I started getting a service brakes and 4x4 when i’m turning my truck off. It never happens when I’m starting or driving. It’s only when I turn it into accessory mode that these pop up. It also doesn’t turn off for a couple seconds when I go to turn...
1-2 of 2 Results