Posted by SWR on December 11, 02 at 20:52:26:
I'm having a strange problem with the power door locks on my 99 Suburban. When I press the power lock switch on the driver or passenger side doors, the front passenger lock always operates, but the rear door locks operate intermittently. Usually, they will lock, but will not unlock. I can see the manual locks trying to unlock (moving a bit), but they just won't pop up. As for the driver manual lock, it almost never functions when the power lock is cycled. Any ideas?