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the remote key entry, rear wiper and hatch, lift window won't unlock on 2004 Chevrolet Trailblazer

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2004 traiblazer, 6cyl, the remote key entry, rear wiper and lift window won't unlock. THere seems to be a dead electrical link to these items. Where should I look for the problem.
(1) Answer
The functions that have failed in your 2004 Chevrolet Trailblazer are all controlled by the liftgate control module which is located in the liftgate. The module could have lost power, ground, communication signal, or failed internally. There are two fuses for the lifgate module, #2 LGM and #19 LGM/DSM. Both fuses are located in the fuse box under the passenger seat behind the driver. If the fuses are OK chances are the liftgate trim panel will need to be removed to check connections and inputs at the liftgate control module.