When driving down the road my rpm's will start going high and then dropping causing my speedometer do do the same thing so I have no clue what speed I'm going. then it will start working fine for a few minutes and start all over again.
SOURCE: My speedometer on a 1997 Buick LeSabre works on
It maybe the speed sensor that sends the signal to the speedometer or the speedometer itself that's has a short in it.
SOURCE: 2004 Buick Rendezvous 6 cyl Front Wheel Drive speed and rpm issue
you have a connection problem going to your intrument cluster unless your real handy working on auto`s better take it to a mechnic
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What you need to do is have the code checked for the service engine soon light.This will help in diagnosing what could be causing the vehicle to stop dead.By this I am assuming you mean it will stall.Auto Zone and some other parts stores will check the code for you for free.But the diagnosing will still need to be done to see what is causing the light to come on and make the car stall.Sometimes you may need a scan tool and a multi meter to help find the problem.Which means you may have to go to a repair shop.Hope this has helped you.Good luck.
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