Hey guys, This may be normal, but in my 05 2500, I can put the ac or heat on all the way and it blows out air, but not as strong as other vehicles I have had in the past. Is this normal? It cools the truck off or heats it up, but it is a lot slower than normal. My wife has a 05 tahoe, and if you turn the air up all the way, it will blow you into the back seat !!!

 

Probably has a door issue going on inside the duct work somewhere.

 

Remove the glovebox and look for what appears to be a grated opening behind it to the right. If the small door that is in there is rattling around then you have been blessed with the infamous blend door issue.

It broke on my '06 just out of warranty. Quick fix is to remove the blower motor, reach up and yank it out.