2001 Chevy Venture weak front A/C blowers

2001 Chevy Tahoe Heat Problem - Tahoe Forum

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Dec 5, 2008 - 10 posts - ‎7 authors 2001 Tahoe, the front heater blows a little hot air when the car warms up and then blows cold air. The rear heat seems to work fine. I changed ...

Rear AC blows hot air - Tahoe Forum - Chevy Tahoe Forum

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Jul 14, 2008 - 10 posts - ‎5 authors
On my wifes 03' Yukon the rear air conditioning blows hot air no .... Pull the panel off and look at the hot/cold actuator shown in the picture.

Is the ac compressor clutch and pulley turning ?

The problem is probably the blower motor relay/breaker. It is located under the hood, in a plastic cover with the rest of the relays. It is labeled either next to the relay or on the inside of the cover.
murf427

Check out this link, should help you understand why that security light is causing this problem.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

How it mounts to the moving armis a touch too far forward.

the most commen problem with no heat is an air lock in the cooling system
when the vehicle is cold remove the rad cap
then there is a air bleed screw on the coolant pipe that goes across the front valve cover open the bleed screw about 3/4 to a full turn
use a funnel and over fill the rad into the funnel (this will make a mess)
make sure you have a steady streem of coolant coming out of the bleeder when you have a steady streem close the bleeder then there is a bleeder screw on the thermostat hosing open it and when you have a steady streem from it close that one then put the rad cap back on
and start the vehicle put your heat controls on VENT ,HOT AND HIGH BLOWER SPEED
run the vehicle and make sure you have HOT AIR COMMING OUT OF THE VENTS NOT WARM if its just warm then shut the engine off and open the bleeder on the pipe not the T-STAT HOUSING
keep repeating till you get HOT AIR COMMING FROM THE VENTS
top up the over flow bottle the rad will be fine
hope this helps

Chevy made some weak intake gaskets on 3.1 and 3.4. My guess is that the intake gasket is weak and/or leaking and it is letting pressure out somewhere. At idle maybe the system pressure is to little to push hot coolant into the heater core.

as long as all the fuses are good.. its probably the blower resistor/module... located next to the blower motor under the pass. side of the dash..

Blowing out of the defrost is a vacuum problem. You have a leak between the motor and the heater controls. Most likely needs to have the A/C system charged up.

Yes! You are absolutely right, sometimes when you drive on rough roads, the lines from the condenser(cold air module) may get loose and you lose your cold air. The fact that it's blowing in one part of the vehicle and not the other is a testament to that. The best advice is to get the air conditioning checked out. they do this really neat thing where they pressurize the line to find out where the leak is coming from. Hope this helped.