2003 Chevrolet Tahoe Rear Door Locks

Suggested Repair

Check the rear door lock relay, related fuses, and the door lock wiring and control circuit. A rear-door-only lock relay may have failed; unlock power is present, so focus on the lock command path.

Conversation Summary

The owner of a 2003 Chevrolet Tahoe reports that both rear doors and the rear door will not lock from the remote or the driver's door electric controls, although they can be locked manually. Once locked, the remote unlocks all doors, including the rear ones. The expert suggests checking the rear door lock relay, fuses, and door lock wiring and control circuits using the provided relay, fuse, and wiring guidance.