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Rear lift gate lock not working

Tiny
LARRY KOPSER
  • MEMBER
  • 2004 GMC ENVOY
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 123,000 MILES
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.
Saturday, July 20th, 2019 AT 5:12 PM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,490 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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Monday, July 22nd, 2019 AT 11:46 AM
Tiny
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.
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Monday, July 22nd, 2019 AT 1:10 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,490 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.
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Tuesday, July 23rd, 2019 AT 12:40 PM

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