2007 GMC Yukon wiring / lights problem - FOUND chewed wires near left rear end - update 1st post

[Fless]

owners manual is not going to be helpful in this case at all, you will have to just start checking the harness's

... and clean and inspect the ground for that RR light assy.

 

[kbuskill]

I think the owners manual may be referring to the Chevrolet tail light assembly as the Chevrolet has the reverse light in the center.



It definitely sounds like a ground issue on the passenger tail light. To test this you can back probe the tail light harness and hook the other end to a known good ground and see if your issues go away.

 

[Doubeleive]

you might want to check the harness under the rear bumper, the tail light harness is a sub-harness the connector to the main harness is under the bumper, get under the truck and look up can't miss it.

 

[kbuskill]

you might want to check the harness under the rear bumper, the tail light harness is a sub-harness the connector to the main harness is under the bumper, get under the truck and look up can't miss it.

This^^^

I often take for granted that people just know this automatically.

 

[StrkAliteN]

Thank you to all for info .... I will update as I tear into things

Will post fix also as to help others with similar tail light demons

 

[Joseph Garcia]

The two dual-filament bulbs (turn signals and brakes) are 7443 (ACDelco 15194045 and GMC 13591401)

The single bulb (backup) is 7441 (ACDelco 15524109 and GMC 15524109)

 

[wsteele]

The owners manual is WRONG.

The stoplamp / tail lamp 3057 will NEVER fit into the socket that is C position in the owners manual as the lamp plug assembly DO NOT match.

Why the incorrect info in a owners manual ?? I have no ******* clue what is normal now or not normal.

All I know is my right rear lite assembly is possessed by demons and I have no clue how to troubleshoot / fix it

My owners manual is incorrect as well.

Top is lights on running and brake light. Middle is lights on running and turn signal. Bottom is back up.

You likely have a bad ground and/or a short in one of the right rear circuits.

 

[StrkAliteN]

Got it all buttoned up and everything is working fine.

The check eng lite is what prevented remote start and cruise control from working

The rat also chewed through the fuel vent valve tubing thing that runs up to the gas filler cap and monitors for fumes / overflow.

$55 worth of parts for that and dropping the spare tire to access and then the code will clear and all 100% at that point

Took a few pics of the wire job ( before and after ) ******* rats

 

[Bill 1960]

Thanks for posting the end of the story. Always nice to know.

 

[89Suburban]

Got it all buttoned up and everything is working fine.

The check eng lite is what prevented remote start and cruise control from working

The rat also chewed through the fuel vent valve tubing thing that runs up to the gas filler cap and monitors for fumes / overflow.

$55 worth of parts for that and dropping the spare tire to access and then the code will clear and all 100% at that point

Took a few pics of the wire job ( before and after ) ******* rats

******* rat bastards. Good job.