2003 Chevrolet Avalanche Repair Question
Asked on January 19, 2013
Chevrolet Avalanche Door Problem
On my 03 avalanche the rear doors won't lock with the lock switch, keyless remote or when shifting into gear, however they will unlock in all modes. do you know what could be causing this?
Asked by (pending member)Answer
Replied on January 20, 2013
There should be lock and unlock relays in the left ip fuse box, left side of dash. The relays should be the same, switch the relays, see if problem follows the relay, if so, faulty relay. I don't usually get that lucky.
Check for applicable trouble codes, because the bcm controls ground for the relays. Do you want a wiring diagram for the system?
