Mechanics

- GMC 1500 IGNITION SWICTH WON'T TURN , ROCKING STEERING WHEEL WILL NOT RELEASE THE SWITCH TO START.BY TAPPING KEY WHILE IN LOCK WITH RUBBER HAMMER IT WILL SOMETIMES ALLOW IT TO TURN AND START

1997 Chevrolet Truck • 198,000 miles

Only by striking key with rubber hammer while trying to turn the key will you somtimes get lucky and star the truck which runs great when it starts
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Paul Kary
December 14, 2011.



It sounds like one or some of the tumblers or springs in the lock cylinder have broken or otherwise failed. The cylinder will need to be replaced.

Rivermikerat
Dec 15, 2011.