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  1. A

    Speedometer inaccurate

    Looking at the wiring schematic on Prodemand I don't see that my truck has a speed sensor calibrator module.
  2. A

    Speedometer inaccurate

    That’s correct is scanner and gps are within a mile of each other
  3. A

    Speedometer inaccurate

    They replaced the printed circuit board in the cluster just in case it was an intermittent problem and repaired my erratic oil pressure indication so I tend to believe them. I'm thinking about ordering an exchange vehicle control module.
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    Speedometer inaccurate

    Let me start by saying I did a search for similar issues and found several but not a fix. I have a 1996 GMC Sierra 1500 5.7 2WD and my speedometer reads 15 to 20 miles higher than actual speed with a scanner I read live data and the computer is seeing the correct speed from the VSS. I had the...
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