no i dont have nav. it is deffinitely a vacuum leak because it changes pitch. some times it changes frequently, like as fast as a turn signal. other times its steady until i give it throttle to move ahead, then it goes away. one thing i have to try tonight is to change the damper positions and...
hello all. i have my 07 yukon whistling at me all the time!!
it sounds like a vacuum leak under the dash somewhere around the center area. only hear it at a stop light when my foot is on the brake and i am in gear. its tone changes slightly too. like kinda going up and down. it is so annoying...
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