Question about 1994 Pontiac Grand Am
They are electric not vacuum and it has a thing called a door Actuator that opens and closes the doors.
Posted on Dec 10, 2016
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Posted on Jan 02, 2017
Take some WD40 and with engine running spray some around all vacume lines if a line is leaking the engine will rev up, than you will know where its at, just watch where you spray it, stay away from exhaust and electrical as much as possible, you don't need to spray a whole lot,A intake gasget might be leaking too try around there consentrating around #1 cyl., just be carefull don't need a fire.
Posted on Mar 03, 2009
the fan motor could just be bad, you can test this by removing the fan and connecting a wire to each terminal and to a battery. the wires hooked up one way will spin the fan and the other way will spin the fan backwards so you cant hook it up wrong. I hope that helps you out!
Posted on Jul 17, 2009
first check to make sure that the hose,s back there didn't crack / of there fine then the heater core has blowen open and is know leaking / if you are in an aera that diesn't get real cold take the hoses off and route one to the other till you can get it fixed
Posted on Feb 25, 2010
Yes, and you can have this information confirmed by any local salvage yard that can provide a cross reference of listings.
Posted on Apr 28, 2010
There should be a basic diagram under the hood. Many shop manuals don't have much better. Your best bet might be to call around to junkyards, see if they have one, and go in the yard and look. They are pretty good about that if you just buy something like a cigarette lighter or something. Basically brakes get full vacuum, PCV valve is next, then the A/C ductwork is smaller and shares with the charcoal canister. There should be no leaks. Brakes and PCV are the important ones the rest plug the leaks and go from there.
Posted on Aug 30, 2012
Testimonial: "Thank You Mark I appreciate your answer. Do you happen to know of a website that would show a picture of the emissions diagram for free?"
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Nov 12, 2013 | 2006 Pontiac Grand Prix
Feb 02, 2013 | 2004 Pontiac Grand Am
There are little doors under the dash that direct the air to either the vents (blows at your face), the defrost (blows at the windshield), or underneath (blow to your feet area) - these doors are controlled by what's called actuator/s and they are usually controlled by vacuum or cables - when the air won't change directions it can be either the vacuum switch, the vacuum line disconnected, cable disconnected or the actuator itself can be stuck or bad...
You also have a heater valve that allows the heated coolant to enter the passenger compartment into a heater core (small radiator to allow heat to transfer into the air when the blower blows air across the core) - this can also be vacuum controlled or cable controlled or electronically controlled - if it malfunctions then you may not get any heat into the passenger compartment - you will have to determine if the valve is not getting the signal to open or is bad and will not open - good luck :O)
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