2005 GMC Canyon truck will not idle...

2005 GMC CANYON
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ASW73
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Engine Performance problem
2005 GMC Canyon Four Wheel Drive Automatic 63000 miles

my truck will not idle properly. It just started doing this tonight. when I start it, my rpms usually idle smoothly @ 500-600 but tonight it kept jumping and dropping so low that it woul die. when I could keep it running long enough to drive it rsn pretty smooth until I had to stop and as soon as I would brake, the engine would try to die and my lights would dim a little, and if it did die it was hard to start back ( 2-3 tries)
Dec 8, 2008 at 6:20 AM
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RASMATAZ
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Lets get the idle air control valve and throttle position sensor check out and then report back for more-also to include the PCV and EGR valves-
Dec 8, 2008 at 6:38 AM