Mechanics

STALLING

GMC Other

I have a 2002 chevy trailblazer. When the A/C is on the engine stalls. When it is off, the truck runs fine. Does this vehicle have a IAC valve that could be causing it to stall?
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Tutter19
March 18, 2006.




Sounds like there is a short with the cooling system. It is drawing to much juice to run the AC and pulling power away from running the engine.

Tiny
Chevyman27
Mar 18, 2006.
I just cleaned the motor, so that could be the problem. The truck will run with the A/C on, but once I stop, the idle will drop and the engine will try and sometimes stall.

Tiny
Tutter19
Mar 18, 2006.
You might want to have the altanator checked to see what it is putting out. At a high level it will run the vehicle, but at an idle if power is going somewhere else, it will stall out. I would check the AC fuse, make sure it can handle the right amount of current, and check all wires to and from the cooling system. After that a certified GMAC dealer will hook it up to the computer. Is it still under warrenty? If not price it out.
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Tiny
Chevyman27
Mar 19, 2006.

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