GMC Sierra

If the key will not turn in the ignition of your 1992 GMC Sierra 350cu how do you replace the switch?


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2015-07-15 18:56:51
2015-07-15 18:56:51

Hey SC==You need to replace the lock cylinder not the switch. If it has air bags, there is a chance you can deploy it while working on it so you may want to leave it to a mechanic. You need to remove the air bag fuse first then take off the air bag then the lock plate and the turn signal switch. Then the key reminder contacts at the end of the lock cyl. There is a screw holding the lock cylinder in so removing it lets you pull it out of the steering column. You will need some special tools that can be rented at the parts store.GoodluckJoe.

You can buy a switch for about 15 dollars to replace it but you must remove the steering wheel and lock ring to do this and that takes a couple special tools to remove this.

This may be oversimplifying things, but before you go to the effort and expense of ripping your steering column apart, check to be sure that the key is not so worn out from use that it no longer works. Good Luck!

Check your Key , It may be worn out ,and will not engage the tumblers in the lock properly. Get a New Key cut and give that a Try First

Make sure you are using the correct key, on my GM truck both the door key and the ignition key fit in the ignition, only one works. If you have lock steering try turning the steering wheel to the right or to the left while trying to turn the key.


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