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I am not sure if the 91 is exactly like my 92, but there is 4 screws that hold the dash plate in place. Remove that. Then you will see two wire assemblies on the left side. One for the dome light and the other for the headlight switch. There is tabs that hold the switch in place via a mounting bracket that is screwed into the dash plate. It also has 4 screws. Unplug the wire assembly. Be careful not to use too much force because you can end up ripping the contacts out. There is a plastic tab that you will need to apply pressure to before the headlight switch will come out. The process is rather easy. The trick is to be patient and not use too much pressure because these are plastic parts and they break very easily. After you get it apart the new headlight switch will just clamp right into place. Reassemble and you are done!

Hope that helps and makes sense.

Lisa

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Q: How do you change the headlight switch on a 1991 1500 SLE GMC?
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