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Message: <blockquote data-quote="YukonDenali03" data-source="post: 26494" data-attributes="member: 14296"><p>A year and a half ago the rear blend door actuator caused me a lot of aggravation, so I set out to figure out how these things work. I compiled my notes into a small document. Hopefully others will find it useful. It's probably more technical than most will be interested in. Let me know if you find errors in the doc.</p></blockquote><p></p>