2001 Oldsmobile Silhouette Does Speedometer Haywire Vehicle Downshifts On Own

2001 OLDSMOBILE SILHOUETTE
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Why does my speedometer go haywire and the vehicle downshifts on its own and constantly jerks
Feb 25, 2013 at 12:18 PM
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JDL
  • ✓Experienced Mechanic
  • 16,098 POSTS
Might be a problem with vehicle speed sensor? Have the trouble codes checked. Some of the national brand autostores will check codes for free. You can check codes youyrself, if you have an olbd2 code reader.
Feb 25, 2013 at 12:52 PM
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