So my truck has been making the "Buzzing" noise from behind the glove box and now the HVAC system only work the defrost position. I have been researching and it sounds as if the blend door actuator needs to be replaced. I removed the glove box and saw there are two actuator motors, but can't figure out how to replace them. Everything is jam packed in there. Has anyone replaced either of the motors and can offer up some advice? Do they have to be accessed from behind the Radio/Head Unit? I also found a thread on the forum, that someone used a syringe/needle combo to pump a lubricant in the black plastic housing to help free up the circ/vent flap cable. The cable is in the middle of the firewall, but I couldn't locate that cable either. My truck is 2006 Sports V8 if that matters. Need some help otherwise will have to take it to the mechanic.