Thread: Troubleshooting Help

I have a 2000 Pontiac Grand Prix GTP . Ever so often the speedometer and heads up display jumps around but the tach iworks fine. It works normal for a while then the speedometer doesn't work for a bout 3-4 days at a time, then all of a sudden it will be normal again.

Also have an occasional stall problem when slowing down at a light..Not sure if both are related to each other or not. Heard people talk about the crankshaft sensor with stall problems. Any help is aprreciated>