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Speedometer works when cold and quits when truck warms up

Discussion in 'Chevy C/K Truck Forum' started by brickhead11, Jan 27, 2012.

  1. brickhead11

    brickhead11 New Member

    I have a '89 K2500 Silverado, 5.7L, AT, when its cold (30 degrees-ish) the speedometer works, but when the truck warms up a few minutes it quits. What's the deal? How do I fix?
  2. murdog94

    murdog94 Epic Member 5+ Years 5000 Posts

    Sounds like the speed sensor is going bad, or else the harness..

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