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Transmission and speedometer quick working on 1996 Chevrolet Lumina

After I changed the serpentine belt, the transmission doesn't shift and the speedometer doesn't work. What could I have touched or undone?

Asked by for the 1996 Chevrolet Lumina
vehicle speed sensor is below the engine on the same side. did the belt break and fly around??

Roy
No, I needed a new serpentine belt for inspection and my husband changed it for me and then the transmission won't shift and the speedometer doesn't work.
there is a sensor below the area where the belt is located on the passenger side. if that is disconnected, then it will cause problems. have him use a flashlight and look around. it is a 2 wire sensor.

Roy
1 more answer
vehicle speed sensor is below the engine on the same side. did the belt break and fly around??

Roy
No, I needed a new serpentine belt for inspection and my husband changed it for me and then the transmission won't shift and the speedometer doesn't work.
there is a sensor below the area where the belt is located on the passenger side. if that is disconnected, then it will cause problems. have him use a flashlight and look around. it is a 2 wire sensor.

Roy