GM Repair Problems? Ask GM Repair Expert Now.
Hi there, I am Cam. Can I get your first name please? To help me get a better sense of your issue, can you tell me if your front marker lights work properly and if the license lights work properly?
Hi Al, how about the Tag lights in the back?
There may be a bad connection at the junction block On the underside of the rear body near the center of the rear bumper. It is possible for the bulb to work intermittently. If the filament is broken, it can swing back into place and work the odd time, usually tapping on the bulb either makes it worse or makes it work. Its not often but it does happen. It could also be a socket issue. My suggestion is to remove the bulb, check it out and see if there is corrosion in the socket, even look to change the bulb.
Very odd. Is this the side corner marker or is this the one that has the signal brake lights in it?
The removal does require the panel to be removed so I would cut and splice myself.
I have to run out. I am a FireMedic on shift today and I have a call. I Will open this up to other experts who can help you sooner.
So I see no one has helped you yet. I have time now if that's ok. Posted are steps to replace that light properly.
Remove the rear door sill trim plate. Picture attached. Once it's off you can remove the harness from the body and replace the light.
OK but its ONLY that light or did I miss some other light that is not working?
Let me look into the schematic. One moment.
So there is no direct connection to the back light with is odd. Does anything with the signal lights make it change?
So that is very strange. Its fed by the same power as the park lights and grounds with the signal lights. So unless there is a strange connection issue, I would say it’s a bad light. Can you test the wiring with a test light and confirm?
It is not a regular bulb. It's an LED so it's not supposed to need replacing. No special relays or anything. I would check the wiring inside the body to be sure that's no shorting out or chaffing. You have the directions to get inside the panel to disconnect the light.
I am on mobile but it's very simple, the sill plate on that side needs to be popped up then out and the connection is behind that.
OK, if it does not work, reverse the wiring. LEDs do have a specific polarity.