Interior Door locks

[05goatls2]

Question about the interior door locks for my 93 kon. When I press lock or unlock on the drivers side door, the mechanical lock barely moves for the drivers side. The passenger side is slow to go up or down, but if I hold the button down it will eventually lock. Now when I press the passenger side buttons, the passenger side moves up and door faster and the drivers side is slow but actually locks or unlocks. Is it the drivers side button that is having a problem? Or the actual locking mechanism?

 

[SunlitComet]

dirty driver switch and driver motor wearing out. also could be resistance in the cross body wire harness.

 

[glenndiver]

Slow Door Locks

I have a similiar problem on a '99 Tahoe 2 dr Z71, electric locks are slow or do not move when it is hot. When the truck is cool they work fine. If one side is in the sun the cool side works but not the hot side. This is the same for using the key fob or the lock button on the door. Any suggestions? Thanks!