Rear lift gate lock not working

2004 GMC ENVOY

123,000 MILES • 6 CYL • 2WD • AUTOMATIC

LARRY KOPSER

MEMBER
2 POSTS

No functions on remotes working as well as the manual interior lock switch will not operate the rear hatch.
Replaced the control module in rear hatch but no change to problem.

Jul 20, 2019 at 5:12 PM

STRAILER

✓ASE Certified Mechanic
54,832 POSTS

These are controlled by the BCM which sounds like it is out but to be sure lets check the fuses. here is a guide to help and the fuse location with BCM replacement instructions below:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.

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Professional Diagram for 2CarPros Members
Click here to log in and view diagram.

Jul 22, 2019 at 11:46 AM

LARRY KOPSER

MEMBER
2 POSTS

Ken:
Thanks for the reply. I didn’t see any blown fuses so I guess it must be in the BCM. That is out of my DIY capability. Looks like I will be crawling in and out of the back if I need to use the lock.

Jul 22, 2019 at 1:10 PM

STRAILER

✓ASE Certified Mechanic
54,832 POSTS

Good job checking the fuses at least you have an idea of what is wrong :) Use 2CarPros anytime, we are here to help. Please tell a friend.

Jul 23, 2019 at 12:40 PM