88 Gmc Ac Drain Leaking On Floor Inside How Do I Fix?
Although it is recommended that only professionals repair a/c systems there are some DYI the average car owner can perform
Check the surface of your gmc radiator and condenser for dirt, leaves or other material which might block air flow.
Check for cracks in hoses and lines. Check the system for leaks.
Make sure the drive belt is properly tensioned. During operation, make sure the belt is free of noise or slippage.
Make sure the blower motor operates at all appropriate positions, then check for distribution of the air from all outlets.