First remove negative post from battery. Then remove the plastic cover on the steering column below the steering wheel. The switch is located just below the key tumbler assembly. Remove two small male torx type retaining bolts. There are two wires with a twist off plug design on the tumbler housing or cut them and solder wires from the new ones back on. Remove the dash panel below the steering column by removing the 7 mm screws and then pull out. Then remove two more screws holding a reinforcement. Under the dash remove one 7 mm screw holding the wire harness together. Reverse operation to install new switch.
With no key you will have to drill out the existing tumbler assembly from the switch in order to unscrew the ignition switch bezel.
Ignition wiring diagram
call a lock smith .
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n ignition switch on a 1991 Chevrolet astro vanAnswern ignition switch on a 1991 Chevrolet astro van
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It is easy . Go to auto parts store buy the ignition switch since directions are in the box. You will need one piece that you can make to hold the springs in place while removing it and replace it . Allow 4 hours for a beginner.
A bad ignition switch can shut down a vehicle's electrical system. Ignition switches have been the cause of a major recall by General Motors.
If this has the locking tilt wheel it is better to find a salvage yard and get the entire steering assembly . Can get for around $100. Parts and time for replacing the Ignition assembly if you can do it at all will not be worth the effort.
1995 & 1996 checy trycks used a two piece ignition switch. I had this same problem and replace a bunch of stuff to find out the ignition switch was intermitting shutting the truck down so check before you spend money on parts you don't need