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  1. #1

    Default Warning light on Dash.."SERVICE 4WD"

    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. #2
    Jr. Apprentice
    Join Date
    Jul 2005
    Spokane & Seattle, WA


    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.
    2002 Chevy TrailBlazer LT 4WD Summit White/Lt. Oak
    Epic Performance (me) custom tuned w/EFILive FlashScan V2, K&N FIPK2 CAI, Magnaflow Dual Catback
    Eibach 1.5/2, Bilstein HDs, Hotchkiss rear swaybar + poly bushings all around, Dueler A/T Revos
    6000K Low/fog HID + Quad Beams mod, The NorthFace Edition clearance lights, mirror turns+running light mod
    Infinity Kappa 104.7w + JBL CS300.1 + Q-Logic form-fitted box
    Redline Tuning hood lift struts, debaged/demolded
    Lots more...:lol:

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