Question about 2002 GMC Yukon XL

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My 02 yukon has a tendency to stall when I'm turning into a parking space or backing out of one. It only does it a really slow speeds. When i come to red light the engines battery gauge drops than picks up and then drops again only to pick up when I press on the gas. Could it be my alternator starting to go bad? A friend said maybe air filter dirty but I already replaced it . Maybe catalyc converter?? help!!!

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  • Anonymous Apr 24, 2009

    Do you think it's best to take it to a mechanic?



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Did you clean the mass air flow sensor when you changed the filter? Get some MAF sensor cleaner and follow the directions. Have the alternator tested. Do you run the gas tank all the way to empty all the time? If so the pump may be shot the pump needs to be submerged in gas to keep it cool if you run it below 1/4 tank a lot its life is considerably shortened. you could also have a vacuum leak ,so that when you apply the brakes there is not enough vacuum left to run right. lastly the Idle air control motor could be weak.

Posted on Apr 24, 2009


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