Warning light on Dash.."SERVICE 4WD"

Discussion in 'Chevy Trailblazer Forum (GMC Envoy)' started by Shambion, Dec 21, 2005.

  1. Shambion

    Shambion New Member

    My warning light on my dash poped on today driving to work telling me to "service my 4wd".....I was driving in 2wd and havent been in 4WD for about a week..... Anyone have any ideas why this poped on or what could have caused it to pop on? I have an appt with the service guys (im dumb when it comes to vehicles) next week and want to know if I should be driving around that long without having it checked....anyone have any expierence with this?
  2. ScarabEpic22

    ScarabEpic22 New Member

    Yea, unfortunately my 02 TB LT has this problem too. Every few months, it will give the Service 4WD light and the 4WD switch will not work. I always intend to go to the dealer and get the computer reflashed, but never get around to it and the 4WD system always comes back in a day or two, no lights on and the 4WD works. I suggest getting the computer reflashed to the most current software, it will probably cure the problem.

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