FUSE AND RELAYS FOR POWER DOOR LOCKS SHOULD BE UNDER THE HOOD.LOOK IN OWNER MANUAL FOR RELAYS LOCATION OR LOOK ON FUSE RELAY COVER FOR RELAYS LOCATION..
On this website (link below) you finde information where you find fuse box locations, diagram and description for Chevrolet Avalanche (2nd generation) - 2008
Chevrolet Avalanche 2nd Generation fuse box diagram Auto Genius
Most likely under the hood in engine compartment fuse box
hope it helps if so please give good review
SOURCE: 08 avalanche pass side power door lock not working
if you have any knowledge of automotivce electrical, (and that you need to use a "circuit tester" and not a test light) test for power when someone presses the button. it wouldnt be uncommon for most vehicles for the lock actuator/solenoid/duty actuator to wear out, get weak and fail. this is most probable. given that this is an 08, have you checked withe dealer to see if its still under warranty. if we are only talking a few miles and they wont do anything, look in your owners handbook and get the 1 800 number and get GM's customer service involved. cheers.
SOURCE: 2008 avalanche 3 door locks not working started
each door has there own door lock solenoid, the only thing they have in common is one fuse, either they all work or none of them will work. So I would say the door lock actuator inside the door has failed.
SOURCE: good afternoon....what would cause my 2008 Chevy
It could be the power lock motor. You could have a short or bad wiring harness. Might just be a fuse that connects to both. But since you said it's only the driver side. When the power lock motor is bad it can trigger your alarm because they're wired together.
Hope that helps. Good luck.
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