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Dave Nova
Dave Nova, Cadillac Technician
Category: Cadillac
Satisfied Customers: 19450
Experience:  ASE Master Certification. GM World Class Certification
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the electronic level control on my 99 deville d

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the electronic level control on my 99 deville d
Is the level control completely inoperative?
Customer: replied 6 years ago.
i don't know what you mean, the rear end of the car is lifted several inches, i don't know how to get it to lower
Locate the rear suspension compressor and ground the white wire going into the compressor with the key on. If this causes the air to vent and the car to lower, you will need to replace the ride height sensor. If this does not allow the car to lower, you have a bad exhaust valve in the compressor and the compressor will need to be replaced.
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