I have a 2005 Silverado v6 and no matter what the passenger side hardly blows and only blows out hot air. Is this a common issue? And if so what should I be looking at to replace?? The drivers side works fine.. No matter how you adjust the passenger side it does not change in temp or blower speed. Thanks!

 

Any luck with this? I just bought a 2005 Silverado with a similar problem. I can change the temp on my defrost but all other settings blow hot. I just bought a Chilton manual to see how the heat\ac system is setup. I did notice on my truck that there is an unplugged wire but, couldn't see where it may plug into or if it's for an optional accessory