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Q:

rear door locks on 2003 Chevrolet Avalanche 1500

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
is there a separate rear door lock relay that controlls the rear door lock actuators, and where is it located?
(1) Answer
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The rear door locks are controlled by separate relays (located in the lower left side of dash fuse box) and the body computer. The body computer sends a ground signal to the lock or unlock relay after the appropriate switch is pressed.