I am also having problems with my 99 suburban. The passenger rear door locks fail as do the drivers. They either stay locked or unlocked for an undesignated period and then randomly work once or twice and then are stuck all over again. It does not matter which key fob is used or if you use the door lock button inside. In fact, if you hit the button a couple of times to try to get it to "unstick", it almost seems like it begins to lose power (at least the truck still starts). I have filed a complaint, but it would be nice to fix this issue! Does anyone know what the dealer actually replaces on the door to fix the problem?