Question about 2003 Chevrolet Suburban 1500

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Don't know if it's an ECU issue. My Sub keeps acting like it's going to stall at stop lights. I notice a dip in the power, and when the AC is on, as a result of that power loss, the compressor goes with it??

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It's hard to say exactly what it could be without looking at it, but I would have the alternator checked out. Reason is, when the car is at idle at a red light or stop the alternator may not be putting out enough of power to perform the a/c and other things it has to power. But as you go down the road, the alternator will put out more power keeping the a/c and engine from trying to cut out or off. It's something I would try plus it's free to have it checked.

Posted on Jul 13, 2010

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