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2002 Trailblazer 4.2 B3770 - New Mode Door Actuator Won’t Move!
What did I miss? In this video I am retesting this mode door actuator. I replaced the actuator but it won’t move and I’m still getting this B3770 DTC for the feedback circuit. What will I find, is it an electrical or mechanical fault? Also, need to give credit to my buddy Joe! I was able to index the actuator with the 0-30v variable voltage ...
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