2005 Buick La Crosse Speedometer

2005 BUICK LA CROSSE
46,000 MILES • 6 CYL • FWD • AUTOMATIC
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CPOOLE0412
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Last weekend while driving my car, my speed on the speedometer jumped from 45 to 65 with out my having excelerated. Now when I drive down our local street, speed limit 40, my speedometer shows I am driving 60. If I go 40 everyone passes me....Can you give me a clue to what might have happened and what part I might need to get replaced?
Sep 12, 2008 at 8:43 PM
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BMRFIXIT
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do u have a check engine light on ?

I would suggest the use of scanner to check and determine the speed and if its the cluster and or speed sensor


have it hooked on to a scanner
better then throwing parts at it
Sep 13, 2008 at 6:46 AM