Close
QUESTIONS

RepairPal is your advocate for car care advice and guidance

Q: a/c or heater on 2003 GMC Safari

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
a/c or heater not blowing air from front vents. you can hear the blower motor, but can barely feel the air. high setting also not working. only med. and low work. please help.
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
Get a Repair Estimate
Guaranteed by certified locations nationwide. Learn more
RepairPal estimates are guaranteed at over 1,700 quality certified locations nationwide. Learn more
Is it possible the air is coming out of the windshield vents all the time? That would indicate a problem with the vacuum supply from the engine to the A/C control assembly. As far as the blower motor goes there is a the high speed works through a relay which is part of the blower motor resistor assembly. Two possible causes would be the switch or the resistor assembly. Please have the blower motor system diagnosed to find the cause of your problems before replacing any parts.
The vacuum lines feeding the diverter switch get brittle and break. If you don't hear a slight vacuum sound when you switch from defroster to vents, check the vacuum lines for cracks or leaks.
Didn't find what you were looking for?