GMC Troubleshooting Questions? Ask a Mechanic for Answers
sorry for the delay.......Problem with these Locks is the BCM (body control module) activates the Lock / UnlockUse of GM Dealer Scan Tool or equal is needed to Test & ProgramYou are limits to Testing / Swapping the LOCK & UNLOCK Relays to see if the Relay is the issue & to Test Fuse "20" on both sides of the fuse for Voltage +The Lock / Unlock Relays & Fuse 20 is located in the Inside Fuse PanelClick Attachment Below
Let me know what you find
The BCM is located under the Steering Column, behind the Lower Dash PanelRemove the Lower Dash Panel to access
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