2002 Buick LeSabre Limited is making a hissing sound

Asked by Jun 03, 2016 at 10:06 PM about the 2002 Buick LeSabre Limited Sedan FWD

Question type: Maintenance & Repair

2002 Buick LeSabre Limited is making a hissing sound when I turn it on by the
rear driver-side tire. Tire isn't leaking any air, and the noise stops once I turn off
the car. The gauges and sensors are not showing any troubles, and the car is
running normal.

4 Answers

76,335

Sounds like a possible plugged catalytic converter creating back pressure in the exhaust. Just take the vehicle to an exhaust shop and have the exhaust inspected.

1 of 1 people found this helpful.
1,720

The Limited may have self leveling in the rear and the hose to that side may be damaged. Is the rear setting lower than usual?

1 of 1 people found this helpful.

txbarney The rear looks normal; I too thought it could be the self-leveling as when I start the vehicle it always makes a mechanical noise (like a machine turning on).

1,720

A little internet research indicates that the car did have auto leveling in the rear. You should find a link that attaches to the car body (under the car) and to the lower rear suspension arm. On one end there is a devise that turn the pump on and off based on the position of the body. The pump will be located around the rear suspension with a air line going to both rear struts. I suspect you have a leak in one of the air lines.

2 of 2 people found this helpful.
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