a/c not working trailblazer 07 4.2


Asked by Brownny250 Jul 21, 2015 at 06:34 PM about the 2007 Chevrolet Trailblazer LS RWD

Question type: Maintenance & Repair

pcm no sending ground signal to relay control, compressor come on when wiring that relay to chassis, coolling ok, continuity is ok between pcm and ground leg in the relay
all fuses involved in a/c are ok, calibrated a/c module and still not working

1 Answer


Actuators lost calibration due a dead battery, had to use scann tool 2 original from chevrolet to get the A/C working properly.

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