Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum banner

auto four wheel drive

  1. A4W does not work!

    4x4 Drivetrain
    When switching from 2W drive to A4W the light does not change or blink, the 4W drive works fine and engages perfectly, even the 2W drive works. Any ideas as to what the problem is, or could be?