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Thread: 1990 gmc 1500 speedometer cuts in and out

  1. #1
    Join Date
    Apr 2009

    Question 1990 gmc 1500 speedometer cuts in and out

    i have a 1990 gmc pickup and my speedometer works on and off if anyone can help please

  2. #2
    Join Date
    Apr 2009


    if the transmission is electronic controlled (possibly is ) the problem is in the tailshaft housing of your transmission(relatively easy to get to ) or if the transmission has a cable instead of wires leading to the tailshaft part of the transmission it is possibly the speedometer cable that is bad.good thing is a cable is a lot cheaper than an electronic transmission part. if your luck is like mine it will be an electronic tranny and cost more money that u don't have or can't afford.try a junkyard for parts!!

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