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Drivers door does not unlock via switch or remote. All other…

Customer Question
Drivers door does not...

Drivers door does not unlock via switch or remote. All other doors function normal. '08 GMC Sierra 2500hd sle

Mechanic's Assistant: Is this your first time dealing with this issue?

Yeah, I have replaced the door lock/actuator assy., and no change.

Mechanic's Assistant: Are you fixing your Sierra 2500HD yourself? What have you tried so far?

By myself. Like I said, I tried a driver door lock actuator assembly. Does the bcm work with the switch and lock assy?

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Have checked all fuses and they are good

Submitted: 1 year ago.Category: GMC
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Answered in 20 hours by:
7/30/2017
GMC Mechanic: sprinkles08, ASE Certified Technician replied 1 year ago
sprinkles08
sprinkles08, ASE Certified Technician
Category: GMC
Satisfied Customers: 24,200
Experience: ASE Master and Advanced level certified. Factory trained with 17 years dealership experience
Verified

Hello and welcome to JustAnswer!

The lock actuator in the driver's door is controlled by the driver's door module.

If the latch has been replaced with a known good part and it still does not work then it will require some electrical testing to determine what is going on. The problem could be wiring or the door module itself. The body controller does communicate with the door module but doesn't control the locks directly.

If all other functions from the driver's switch are ok then the next step I would recommend is testing the wiring between the door module and the latch, and if ok then inspect the wiring in the boot between the door and body. This wiring flexes each time the door is opened and closed and can eventually break.

I hope that helps! My goal is your satisfaction today. If you feel I've been professional and helpful, your 5-star rating at this time is most appreciated. However, if you still need my help you can reply back here and I'll respond as soon as possible! Thank you!

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