Before directly, replacing switch.First remove the switch and inspect the switch.sometimes its just loose connection or short or cut in wire causing the switch non-operating.Also check voltage at switch, also try by passing the switch with hot wire and see.but if nothing works, then replace switch.------
GM# 25965499 door switch.- Inside the door pull pocket, there is a rectangular rubber pad. Remove it and you'll see two torx head bolts, remove them. You'll probably have to buy a torx socket set if you dont already have one. There is several different sizes of torx bolts on this car, and they have become a very common type of bolt. I'd get an entire set rather on just one for this project.
- Once the bolts are removed, tilt the entire switch panel up from the rear and pull rearward. There is a small clip that holds down the front part of the panel, that is why you need to pull it rearward.
- Once the panel is disengaged from the door, unplug the electrical connectors. There are three.
- Now that the panel is completly free from the door, disengage the lock switch from the panel. It snaps in place.
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For its diagram, see below:---
Part number 22:---
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To order this part, this is available at many places.Click this links below:---
Link number 1, click it:---
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Link number to order switch:---
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