[vt_hokie2008]

I've searched and searched, called two dealerships, and ended up with 3 different part numbers for the door lock actuator. The truck is a 2009 Sierra Extended Cab and the passenger door lock stopped working, presumably the actuator. The latest number I got from the dealer is #25876837 which brings up nothing on the web. I've also received these: #25876385 #25873485.

Which one is correct? I wouldn't have thought it to be this difficult to find it. Thanks!