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
no connection to the vent door. take a look and see if there was anything around the area that you may have disturbed.