Rob Clayhill
+1y
I took out the dash trim in an 03 Alero to hook up a line level converter to the stock stereo so i can run a system and after plugging everything back in, including all of the heater and cooling controls the system only blows out hot air, even when turned to the cool dial. i checked all of the harnesses and made sure the vaccuum lines are plugged in right but still cant figure this out... any ideas??!