2002 chevy trailblazer_ls
Hello everyone, I am having a AC issue not completely diffrent than what I have found on here but a little. My air is getting cold, (compressor is engaging) but only blows out of rear vents. The air blows great out the rear vents but none at all from any of the front vents (defrost, upper, lower). I have had the system charged recently, I checked the psi on the low side and seems to be appropriate. At hyw speeds you can feel a little air flow out of the vents but not much. When I turn off the air all together at hyw speed I can feel a burst of air on my feet. I am not sure what else to check. I have read a lot of post about the underdash copontiants but would like to know if this could be something diffrent before I go pulling my dash apart. Thanks so much for looking.