I need a little help from the mechanics out there. I have a 2001 GMC 2500HD 6.0 extended cab. The passenger side automatic door lock does not work properly. when you hit the button on the door or remote all you hear is what I assume is the lock actuator buzzing. in order to actually lock the door, I have to manually flip the lock slide. I recently took the truck to a mechanic to have the transmission serviced and had him look at it. He quoted me a price of $800 for repair of the lock. That seems high to me since a lock actuator can be had online for around $30. Am I missing something? Is there a another hugely expensive part in there that I am unaware of? Is there that much labor involved? Any help would be greatly appreciated.
John