The HVAC unit uses vacuum to open and close doors that control the heat. The heater core is always hot if coolant is flowing. The temperature control closes a door that lets cold air bypass the heater core. Check to see if you have vacuum to the control panel. [IMG]http://i17.photobucket.com/albums/b72/tenspeed/wiring/service%20manu al/HVAC010.jpg[/IMG]
2003 Pontiac Grand Am GT Coupe
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Maintenance & Repair
water pump change on a 99 grand am takes how long to change? How many hours?
1999 Pontiac Grand Am 4 Dr SE Sedan
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Maintenance & Repair
it sounds like it is making a grinding noise but not the whole time the car is running.
2003 Pontiac Grand Am SE
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Maintenance & Repair
I took it to a family friend who ran diagnostics on it and was told to get a Bank 1, Sensor 1 position Oxygen sensor. From what I understand the Grand Am has two oxygen sensors.. one upstream and o...
2001 Pontiac Grand Am GT
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Maintenance & Repair
I can hear the pump clickin when i turn the switch.mabey its already primed
2003 Pontiac Grand Am GT
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Maintenance & Repair
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