Question about 1999 Cadillac DeVille

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Need to locate the air pump that supplies the rear shocks.

Load leveler doesn't work. won't turn on the pump when rear end is loaded, and won't level the car when it first starts.

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  • Cadillac Master
  • 5,309 Answers

The pump is back under the rear of car, but by now, the shocks are sure to be leaking, which causes the pump to run too much burning it up. Best fix is to replace rear shocks with coils and dump the self leveling feature, or prepare to pay big bucks to replace most components.

Posted on Jan 24, 2015

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Posted on Jan 02, 2017

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SOURCE: I have a 1998 caddy deville, need to locate load level relay

There is a switch with an arm on it that connects the body to the rear axle... likely it's not working!

Posted on Feb 10, 2009

  • 166 Answers

SOURCE: Back end rides high!

it may not have been pluged in or the arm that goes from the contrl arm to the sensor not snap in to place . the rod snaps in to a ball and socket . if you look under the rear of the car you should see it it bolts to the fram and has a arm that goes to the lower control arm .

Posted on Jun 02, 2009

  • 1129 Answers

SOURCE: 99 Deville rear air shocks not working.

This is an expensive repair sometimes and you may want to replace this system with inflatable air bags that fit inside the rear coil springs and then are inflated. I think they cost about $80.00 or $120.00 depending on the car.

Posted on Jul 14, 2009

abauto
  • 353 Answers

SOURCE: My 98 Cadillac DeVille rear air suspension system

Common problem on all air suspension vehicles. It could be that there is a hairline crack in one of the shock bladders or that the pump is just too weak to pump up to it's intended pressure, a sensor or solenoid could also be bad.

Whenever I run into this problem I order a spring conversion kit for that vehicle, it is usually not worth spending $3000+ to repair the suspension.

www.Strutmasters.com sells the best kits, $327.00 for the rear. It also comes with a resistor so that your suspension light is not on.

Posted on Sep 19, 2009

  • 7353 Answers

SOURCE: i just purchased a rear

the kit should have instructions on how to bypass that message., if not call the Mfg of the kit.

Posted on Aug 31, 2011

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1 Answer

What does the leveler light on dash mean?


Its part of the auto load leveling system. It pumps air to the rear shocks until you reach level condition. Usually only when you first start the vehicle.

Jan 23, 2013 | 1998 Mazda MPV

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I have a 1999 Lincoln town car limousine. Sometimes the rear air suspension will drop down after being parked for awhile. But, sometimes it doesn't. While driving with no one in the car the suspension...


Yes, There are leveling sensors under the car. You really have 2 separate problems though.

There is a Master venting valve usually under the drivers front fender. It bleeds the air out of the system. It is suppose to bleed out enough to level the car and not allow the rear end to dip.

The doorjam switches and the trunklid switch are part of the system. If these switches send an "open" signal, the rear bags will not inflate. Conversely the switches must work to tell the car to lower when a door or trunklid is open.

Because of the stretch of the car or LIFTING THE CAR without deactivating the sensor switch in the trunk, the leveling sensor can be unseated or damaged. It is normal for the suspension to raise to compensate for added passenger weight. It will not raise until the doors are closed as well as the trunklid.

It sounds like the master venting solenoid may be bad and working intermittently before failing altogether. You can soap water test the bags and the lines for leaks.

Remember to watch your tire rating. Load classes go by Alphabet letters with a "D" having more capacity than a "C" and an "E" having more capacity than a "D". Tire inflation is directly related to carrying capacity. It is stated on the sidewall of your tires. What I am trying clumsily to say is that you can not let your rear tires bulge out with heavy passengers and then try to let the Air-Ride jack up the car to compensate.

I use an SUV style tire on my lighter car. Your Lincoln is heavy to begin with, but with added passengers or a "stretch" the weight goes beyond the stock tires' capability to handle the load.

I hope my solution is helpful.

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1 Answer

The rear end stays up untill you take air line loose let air out it will go down but will come up again in a few days


this sounds like the load leveling sensor at the rear of the car is not working or gets stuck in the low position causing the air compressor to pump air into the rear suspension,or it is defective and needs replacing.

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you might have a leak in the rear suspension load leveler. check connections with soapy water. locate where sound is coming from. fuel pump in tank is a slight hum and not that noticable, but the air comp for load leveler is. Also spray around rubber boots on shocks, also check load leveler switch on axle to frame for broken or loose lever control.

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1 Answer

99 Deville rear air shocks not working.


This is an expensive repair sometimes and you may want to replace this system with inflatable air bags that fit inside the rear coil springs and then are inflated. I think they cost about $80.00 or $120.00 depending on the car.

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This happened to me.... ends up that the lever that senses the level was disconnected or broken and therefore stuck in a position whereby the sensor thinks the back end is too low. I wired the lever back into the appropriate position on the axel and I was able to keep using the vehicle until I got the replacement load leveler lever.

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The problem is a leaking air shock(s). My 1997 catera had this problem also. I drove the rear wheels up on a set of ramps and went underneath. There is a sensor located close to the rear axle's that moves up when the car is loaded in the rear. (luggage/person in the back seat). When the car senses the extra weight, a small compressor located up under the hood pumps air to the air shocks until the car is back level again. With the key turned on, and the engine off, You can actually move this sensor with your hand and after about 45 seconds, you will hear the small electric compressor come on and see the rear of the car rise. Even if the shock is leaking, the car will still rise but you can hear/feel the air leak on the rubber boot of the shock. The reason the light never stops flashing is because of the air leak the car never really reaches proper leveling. I know what your thinking, "I didn't have extra weight in the car"..doesn't matter car still levels itself from time to time without extra load in the rear. Possible road conditions etc. and also the fact your basically riding around with only one rear shock working like it should. hope this helps......dave

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