Thanks for the input guys, anymore suggestions are greatly appreciated as well, I think there must be something clogged, I bought the truck from my dad, he is the orig owner and has put almost 400k on it and he used to have a wire hair terrior (RIP Matice) and she used to lay on the passenger...
I just got my truck and the heating and AC doesn't seem to blow very hard on HI, I've been in other suburbans and tahoes/Blazers and from what I remember they blew really hard, the motor under the glove box sounds like it's blowing a ton of air and working hard but it's just not coming out like...