what would cause the speedometer to quit
while driving my 2006 cobalt my speedometer will quit working and it sounds like its gonna stall.but if you mash the throttle to the 7000 redline it will seem to move .if you stop and restart everything is ok again the vss on my scan tool reads 0mph evn if im doing 30 mph im thinking it may be the output speed sensor on the transmission or even a faulty key switch even though i have no dtc . any suggestions or hints?
PROBABLY THE STEPPER MOTOR IN THE GUAGE CLUSTER ITSELF. GM HAS LOTS OF PROBLEMS WITH THESE ON YUKON/TAHOES PICK UPS AND IMPALAS THAT I KNOW OF. MAYBE CHECK THE GM TECH BULITTEN AND SEE IF THE COBALT IS LISTED.IT CAN BE FOUND ONLINE
thanks for the suggestion,but i figured out that the problem was the transmission output speed sensor was bad. i replaced it and it is now fixed .
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