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

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

Question type: Maintenance & Repair

4 Answers

275

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

1 out of 1 people think this is helpful.
7,515

is the brake petal "squishy"

1 out of 1 people think this is helpful.
57,155

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

2 out of 2 people think this is helpful.
275

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

1 out of 1 people think this is helpful.

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