ChevMech

Just a quick update: I found the problem with my faulty reverse lights: the relay under the fuse panel is blown. I borrowed the fuse panel out of my parents' Tahoe and everything worked as it should. While I was looking for a replacement (let me know if you have one) I found that this is a really really really common problem on GM trucks of this generation. I read that the ground strap from the firewall to the engine cracks/breaks causing power surges of sorts. The most obvious of symptoms: the relay for the backup lights fails. The solution: replace the strap or add a ground wire. For what it's worth, I'm thinking adding the wire will fix the blinking the headlights do when I hit a bump too hard.

So let’s say it is the relay, what’s the next step?

This is going to be my project for this weekend, so I'm going to take a tester to everything that may or may not be related to the backup light circuit. My next question, where is the back-up light switch located on the transmission? I'm not seeing a switch designed for this function on any parts websites. A Google search shows two thing: either one that threads in, or the neutral safety switch.

Okay guys, It's been a long time since I've posted, but I'm having a little bit of a problem. My 2009 2500HD gas has no back-up light. None, nada, zip....nothing. I have run a hot wire to the fuse and they light up, so i know the wiring to the back and the bulbs and sockets are working. They don't, however, turn on when you put the truck into reverse, or when the rest of the perimeter lighting is engaged. I also have nothing on the trailer circuit. Besides running that jumper wire, I have done nothing but check the fuses, and despite what the google machine says, there is no relay on this one. Is there a common failure on these trucks that would cause this problem?