1999 Pontiac Montana

Electrical problem
1999 Pontiac Montana 6 cyl Front Wheel Drive Automatic 71000 miles

I have a pontiac montana 99 and when I try to unlock doors on driver and passerger side it will only lock it wont unlock but it will unlock wit my keyless entry I thought it was my switches so I changed them but its still doing the same thing. Can you help me pleae
January 27, 2010.

Dunno your electrical experiences but this can be a very complicated issue.I will give you a headstart don't work have the Body Control Module checked out at the dealer-below is to test a problem with the unlock circuit within the BCM

Jan 28, 2010.