"ssss" noise by firewall- drivers' side under hood

Asked by BLB2947 Nov 24, 2015 at 03:16 PM about the GMC Jimmy

Question type: Maintenance & Repair

4 Answers
605

HONESTO answered 8 years ago

Does the noise change with speed? change with engine rpm? when braking?

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F_O_R answered 8 years ago

I suspect a vacuum leak. Check for loose or damaged vacuum lines.

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605

HONESTO answered 8 years ago

anyways does it make the noise just sitting still with the engine running and the vehicle not moving?

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