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2013 Chevrolet Suburban
Platform: GMT 400, 800, 900

2003 suburban

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Old Jul 6, 2010 | 11:55 PM
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harmonjr
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Default 2003 suburban
My wifes 03 suburban almost dies when the ac is turned on the rpm drops down is there something that controls the fast idle.when the ac is turned on?
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Old Jul 7, 2010 | 10:21 AM
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You need to clean the throttle body.
removed the throttle plate and inspect the intake and you will see lots of carbon build up, clean the plate and the body itself...
There is a TSB out on this and is listed somewhere in the forum
its is a VERY common problem
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Old Jul 7, 2010 | 8:38 PM
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The ECM controls the idle speed.
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