Got an issue with my '92 K1500

Discussion in 'Chevy Suburban Forum (GMC Yukon XL)' started by silverlion, Oct 19, 2010.

  1. silverlion

    silverlion New Member

    My speedometer reads 20-30 MPH fast. I was thinking speed sensor, but don't they just go out causing the speedo to not read at all?
  2. ejohnson03

    ejohnson03 Epic Member 5+ Years 1000 Posts

    Have you had any transmission work done recently?
    Are the tires stock size?
    Is the speedo cable properly seated in the tranny tail section?
    Do you have a modified PCM chip?
  3. Crawdaddy

    Crawdaddy All hail the Mad King!! Staff Member 5+ Years 1000 Posts Platinum Contributor

    For a 92 Suburban, you might still have a DRAC unit. Unless someone messed with the jumpers in it, that shouldn't be the issue. I would also lean towards a tire size change or regearing. There is a possibility that there's some metal filings or other junk by the VSS sensor, but the odds of that are probably pretty low.
  4. silverlion

    silverlion New Member

    The tranny was rebuilt. Tires are stock, gears are stock. I'll check the cable. It's 4WD if that helps.
  5. silverlion

    silverlion New Member

    Guess it's time to throw parts at it. I refuse to go to the stealership. At least I'll have a bunch on new parts on it. LOL
  6. silverlion

    silverlion New Member

    Just decided to not worry about it. I did notice that on occasion the speedo jumps when I turn on the blinker.

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