07 Chevy suburban making a whistling noise loss of power and tranny keeps downshifting

Asked by May 04, 2015 at 12:01 AM about the 2007 Chevrolet Suburban LTZ 1500 4WD

Question type: Maintenance & Repair

2 Answers

237,715

Whistling noise in the engine bay is usually from a split vacuum hose. That will give you a loss of power.

Could be your converter. When they get clogged up, the back pressure causes a whistle noise and you will lose power.

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