My 2007 GMC Sierra has a chirping sound when it's started and gets faster as u accelerate...anyone have any ideas

20

Asked by Mar 27, 2015 at 11:58 PM

Question type: Maintenance & Repair

6 Answers

58,815

Sounds like a noisy pulley. HTH. -Jim

20

Well after studying where the noise was coming from it sounds like it's under the valve cover

3,545

Bad serpentine belt or bad bearing in Altrrnator ! Take a very long long screwdriver place it on Alternator (if you have long hair be careful tie it up dont wear anything that will dangle) open hood start car place ear on handle of screwdriver it will act as a stethascope u will hear bear bouncing around ! Dont try this trick on water pump ?!

3,545

Use screwdriver on valve cover

20

Is there a possibility that this could be somewhere between the rockers and the crank?

3,545

Check all the components that run off the fan belt (serpentine) first! If its under a valve cover youre not looking good as you may have metal on metal contact! Pulleys can echo noise so make sure to eliminate them first

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