1999 Cadillac DeVille Logo
Posted on Jan 22, 2011
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My 1999 cadillac deville air suspension not working

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  • Posted on Feb 27, 2011
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Check in this order: Is the compressor starting when you turn the car on? If not: is the fuse burnt, broken wires? If not: Is the linkage that connects the frame to the left rear shock broken or seized? (more wires to check here). If the compressor runs and the linkage is functional, spray some windex (or soapy solution) on the rubbers of the rear shocks and around the hoses to see if air is bubbling out. If so, this is where the problem is. Many aftermarket shocks/struts are available (check ebay) online for as little as $ 150.00 each, and $ 175.00 for the compressor.

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You can also just replace the air shocks with standard coil struts for a lot less money than dealing with your air suspension ad infinitum. This company Strutmasters in North Carolina is a good source for those kits that let you do it:
https://www.strutmasters.com/?s=cadillac+deville&post_type=products

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2answers

Need to locate the air pump that supplies the rear shocks.
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.
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Mar 30, 2014 • 1999 Cadillac DeVille
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Air Suspension Ride in 1999 Cadillac Deville
rear shocks and lines for leaks, does air pump run? test for low
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How to remove air suspension pump?
Replacing your Cadillac DeVille DTS electronic shocks with these reliable non-electronic shocks is a simple installation procedure. Cadillac air suspension fails because of rubber dry rotting, and then leaking. Your air suspension compressor will eventually fail because of this. Cadillac shocks in the front fail because of the seals in the Cadillac shock wearing down over time. They eventually leak, losing its dampening ability needed for a safe and smooth ride. Try cadillac dealership for a little more info.
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Apr 19, 2011 • 1998 Cadillac DeVille
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The rear of the car sets higher than the front, suspension is stiff in the back to. Is there a suspension control system that is not working
There's a level sensor in the back of most cars that have air ride suspension such as Cadillac Devilles.

If there is plenty of pressure, it's probably not a leaky air shock aborber nor is it a bad air pump under the hood.
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Nov 11, 2010 • 1994 Cadillac DeVille
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Low rear suspension on my 1999 Cadillac DeVille
Do you hear your compressor running? It may be that it is getting tired and ready to burn out on you. I replaced the compressor twice on my Deville before I found that there were so many holes and nicks in the air bags and it was going to cost me almost $1500 to fix the whole system. I went online and found Strutmasters. I got a non air conversion kit for my car and love it. Saved me money and headache.
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May 20, 2010 • 1999 Cadillac DeVille
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Why is my cadillac rear so low
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Nov 24, 2009 • 1999 Cadillac DeVille
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My cadillac 1999 deville is up in the back,and i don't know why
Up, as in suspension? The leveling valve linkage may have come loose and the suspension has over inflated. The valve should be above the rear axle
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Nov 07, 2009 • 1999 Cadillac DeVille
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On the Cadillac Devilles you may need a relay to turn that suspenison off. If you are having trouble with the air ride all together you may want to check out Strutmasters.com. They offer non air conversion kits for your vehicle at a lower cost than it would be to fix that air ride. Save yourself time, headache and money and check them out.
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Apr 14, 2009 • Cadillac DeVille Cars & Trucks
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1999 Eldorado rear air suspension inflated to max
Converting from the air ride suspension to the passive coil spring suspension will eliminate this problem. To fix your air system you will have to purchase the parts directly from the dealer which means the prices will be severely inflated. Check out Strutmasters website at: http://www.strutmasters.com/Cadillac-Eldorado-Air-Suspension-Rear-Conversion-R-p/-cad-r5ns-el.htm My Uncle converted his Cadillac Deville two years and has only had positive things to say about the effects! I hope this advice was of some help.
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Need to locate the air pump that supplies the rear shocks.

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