What else could cause my vehicle to act like that on 2000 GMC Yukon XL 1500

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I have replaced my fuel filter and pump, but my vehicle still stalls and idle low
(2) Answers
its either your idle control valve or the throttle position sensor on the side of the throttle body, you can take it off and just spray it out with break cleaner and put it back on, its 76 bucks but i have had to do it 4 times in the life of my yukon so far, its on the driver side of the throttle body, you can just take the belt of the alt. and ubolt it to get to the sensor
my 2003 yukon xl did the same thing and the dealer said it was a leaking intake manifold gasket. they replaced the gaskets under warranty and i havn't had a problem since.