Electric lift gate not working properly

Tiny
RC51JIM
  • MEMBER
  • 2014 GMC YUKON
  • 6.2L
  • V8
  • 4WD
  • AUTOMATIC
  • 114,000 MILES
I have the vehicle listed above xl Denali. The lift gate outside opening switch stopped working, but the remote would still open and close it. Now the lift gate will not respond to the remote or switch(exterior handle).

I have electrically tested the following:

1. Lift gate locking actuator.(Functioning).
2. Lift gate close switch and exterior push switch (functioning).
3. Checked LGM/OBS/ inline 175amp (functioning) and I have power at the lift gate actuator. Pulled actuator and applied power to lift motor without the lift module and clutch spins.
4. Unplugged battery and let sit for 10 minutes, installed everything and still not working. When I use the remote to try and open the lift gate the running lights only blink once instead of the 3 times and no audible tone. Signs are pointing to the lift gate module?
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Saturday, October 10th, 2020 AT 12:29 PM

1 Reply

Tiny
DANNY L
  • MEMBER
Hello, I'm Danny.

I've attached a series of diagnostic steps below to help with your liftgate issue. You might want to try this before just replacing the module. Get back to us after you test and we'll go from there. Hope this helps and thanks for using 2CarPros.
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Saturday, October 10th, 2020 AT 11:29 PM

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