Hello everyone. My 1993 GMC G3500 van's backup/reverse lights won't come on. I've checked the fuse, the wiring (as best I could), and replaced the bulbs. I'm at a loss. The only thing I can think of is a backup sensor or switch. Where is the backup sensor or backup light switch on this vehicle? I'm guessing it's on the tranny but I'm not sure. Thanks.
-- Splat