2000 Suburb door lock actuator

I'm looking for a replacement for a door lock actuator on the drivers side. No parts place seems to carry it and also I looked online with no success. Only thing I found is the actuator with 2 plug-ins but not three. Is the third white plug-in for the keyless entry? Is it a dealer part only?

Thanks

NAPA's got just about every Chinese made replacement part there is. Otherwise it's the dealer. Also go to http://www.gmpartsdirect.com/ and check there.