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    Jonathan T. Moore's Avatar
    Jonathan T. Moore Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Mar 8, 2010, 08:40 AM
    Speedometer not working
    My speedometer reads wrong. I can be traveling about 60 mph and it reads 90 mph. When it first happened, I was doing about 75 mph then my speedometer just started climbing higher. My actual speed did not increase. When I come to a complete stop, it reads between 30 and 40 mph. I drive a 2005 GMC Sierra, 1/2 ton, extended cab. What are the possible causes for my problem.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
    Uber Member
    		  
    #2

    Mar 8, 2010, 09:55 AM

    . Check the connection to the Variable Speed Sensor (VSS).

    . Replace the VSS.

    . Check all under dash and under hood fuses with a test light or multimeter.

    . Replace the speedometer.
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