why does my Cadillac idle low while in park or when my foot is on the brake? on 2003 Cadillac Escalade

It idle low all the time especially when I turn the heat or ac on

by in Virginia Beach, VA on November 11, 2011
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1 answer
ANSWER by , November 11, 2011
could be a dirty throttle body. I would have it checked at a shop to confirm and get a bid. Roy