bobc997615
5/6/2008 3:26:08 PM
Just guessing, I think that it is the switch that mounts on the cowl sheet metal, just above the distributor. Maybe for the vapor control system to the canister?
vadatara2
5/6/2008 5:55:36 PM
It's a front axle vac switch. Engages 4 wheel
Peru Motors
5/6/2008 6:35:50 PM
you can buy it thru GM and I believe that GM is the only place you can purchase it at this time. JP
NVANZEE
5/7/2008 10:10:49 AM
go to the dealer ship. I replaced mine about 2 months ago. I think i paid around $20 for it but thats with my employee dicount.