2004 Chevrolet Impala

Electrical problem
2004 Chevy Impala 6 cyl Front Wheel Drive Automatic

does a speed sensor in the transaxle control the speedometer. Mine goes to 0 after about 40 minutes driving. Then works again after it is shut down for a while
January 18, 2010.

Yes, the VSS controls the speedo. However, if your VSS is faulty, it'll definitely set a trouble code in your computer and the " Check Engine" light will come on.

Is yours on? If so, have it scanned at AutoZone. They'll do this for free. Then go from there.

If not, then nothing's wrong with your VSS. The problem will lies with the speedo itself, or the gauge cluster's wiring. I'm not sure, but I believe the gauge clusters on your vehicle requires complete replacement.

Ernest Clark
Jan 18, 2010.