[LNP]

I'm not sure how the stock ones came in the trucks my truck is 69 so no door jam switch. But after many many years wrenchin on garages through out my life I know some switches came from the factory with a nylon washer that went behind the hex. I think it was to keep the socket from scratchin the paint but not sure on that. Anyway you can look at a switch with the nylon washer by Googling AC Delco GM 15693389. Another good repair I didnt see mention is a rivet nut. They install like a pop rivet. If you dont have the rivet nut instalation tool just use a bolt. You can get rivet nuts in steel and aluminum. I have used them for lots of different jobs they work great.