[kingspec]

Anyone have an answer on where to look for a power door lock problem on a 1999 Suburban. The power lock switches do not work on either the driver or passenger side. However, the doors unlock/lock just fine from the key fob. I don't see any blown fuses, but don't know where else to look. Any help would be greatly appreciated!

 

[cjcullom]

Maybe pull panel apart enough to get to switch plug and remove switch. I use a battery jumper clipped to a smallish screwdriver and the same for the negative and try to energize the switch harness. If you can actuate the windows this way you need a switch. A little crude but learned this checking power window motors in the junkyard! May spark on occassion but wont hurt you other than a tingle.

 

[Meangreen30]

I have the same issue on my 98 z71. I assumed it was the switch and replaced it, but that didn’t fix the problem. Please let me know if you figure out where to look next.

 

[TFA303]

I feel your frustration - I have the opposite problem - fob won't work, but switch will, except the back doors which will unlock with the power switch, but will only lock manually.
I've had a lot of ground problems, so I think it's either that or demonic possession.