what year is your truck? the onstar module sits under your radio( can see it from under if u stick your head under it) unplug the 2 connectors and 2 antenna wires and you have to jump the tan/black wires from each connector and then jump the tan wires from each connector. those are lan wires so you just need to close the loop and leave them unplugged.
if its an 07 to early 08 u can just pull the fuse marked "info" under the hood iirc..
A forum community dedicated to GMC and Chevy full size owners and enthusiasts. Come join the discussion about Silverados, Sierras, and other full size trucks performance, modifications, suspension, lift kits, tires, maintenance, and more!