GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hello my name is***** am an ASE master tech, glad to help on this.
Sounds like you have a bad lock actuatosr in the gate, and in the drivers door. You would need to replace them to get the buzz sound to go away, this should also correct the gate not being able to open. You would need to pull the door and gate panels to replace the actuators.
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Hello again Dan here,
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