I relaced blower resistor @ harness in truck (GM service bullitin E105082) due to melted wires. since installing, the vent selector switch does not work. I thought I was carefull to match up wires from old harness to new. Any ideas as to what would cause this? It fixed the fan speed problem I was having, but now I have no control over vent selection.
Why vent control not working on 2005 Chevrolet Express 1500
by bohhica in Spokane, WA on November 16, 2010
ANSWER by mastertech6371 on November 16, 2010
no connection to the vent door. take a look and see if there was anything around the area that you may have disturbed. Roy