Question about 2001 Cadillac DeVille

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1998 deville, suspension automatic leveling system

1998 deville

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By pass the air compressor unit with a universal air shock kit from auto zone. 18 bucks a couple of fittings and fill it up manually

Posted on Aug 17, 2008

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Posted on Jan 02, 2017

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My check your air suspension warning light came on. I checked the book that came with the car and it said, it could be in the electic part of it. So my question to u is what can the electric part be?


It's mostly electronic , There is a control module ,sensor's at the corners ,wheels , an electric compressor to pump air to raise the vehicle .
You don't say what make , model an year vehicle but there all pretty much the same . This is for a Cadillac Deville
The electronic suspension control (ESC) system consists of the following components:
?€¢
Electronic suspension control (ESC) module (3)


?€¢
Four dampers contained in the 2 front struts (5 and 6) and the 2 rear shock absorbers (1 and 9)


?€¢
Four positions sensors (2, 4, 7, and 8)


?€¢
ALC air compressor module (10)


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Damper relay (not shown)


?€¢
ELC relay (not shown)

The ESC system with rear automatic level control (ALC) controls damping forces in the front struts and rear shock absorbers in response to various road and driving conditions. The rear ALC portion of the system maintains a proper vehicle trim height under various vehicle load conditions. For more information on the ALC, refer to Automatic Level Control Description and Operation in Automatic Level Control.
The ESC module receives the following inputs: wheel-to-body position, vehicle speed, and lift/dive. The ESC module evaluates these inputs and controls actuators in each of the dampers independently to provide varied levels of suspension control.
Your best bet is take it to the dealer !

Jan 12, 2016 | Cars & Trucks

1 Answer

2003 Yukon Denali has Service ride Control Warning..wat to do?


Hi Jose:
The first place to start is to have Ride Control Module scanned for trouble codes, this requires a high end scan tool. Most common problem is the air compressor in the rear or a height sensor. Here is how the system works.

Automatic Level Control Description and Operation
The RTD system is bi-state real time damping system. The Suspension Control module controls the suspension damper solenoids and suspension position sensors, along with parts of the automatic level control (ALC) system and electronic variable orifice (EVO) power steering system.

The Automatic Level Control system consists of the following:
• Suspension Control Module
• Compressor/Leveling Module
- Air Pressure Sensor
- Exhaust Solenoid
• Compressor Motor Relay

The objective of the Automatic Level Control System is to provide constant ride height at all load conditions. The Suspension Control module monitors body-to-wheel height, and vehicle speed.

The Suspension Control module will use the rear body-to-wheel displacements and vehicle speed inputs to keep the rear trim height of the vehicle at its desired level.

The electronic suspension control (ESC) system is bi-state real time damping system. The ESC module controls the suspension damper solenoids and suspension position sensors, along with parts of the automatic level control (ALC) system, if 1500 series.

The ESC system consists of the following:
• The ESC module
• The compressor/leveling module, if 1500 series
- The air pressure sensor, if 1500 series
- The exhaust solenoid, if 1500 series
• The compressor motor relay, if 1500 series
• The steering handwheel speed/position sensor
• The suspension damper solenoids
• The suspension position sensors

Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using Fixya, and have a nice day.

Nov 16, 2011 | 2003 GMC Yukon Denali

1 Answer

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.

Nov 11, 2010 | 1994 Cadillac DeVille

1 Answer

I think that my 1998 Cadillac air suspension system is going bad


I had a problem with my '98 Deville. I had a lot of issues with the air shocks and all the other electronic stuff that goes with that. I called the dealer, and they wanted $3500 to fix it!!! I found www.Strutmasters.com and they converted my car to a "passive" suspension, which bypassed that whole computer thing. Now I have a lifetime warranty, and I am VERY satisfied with the ride. The best part is that it only cost $800 and I got all new suspension! I highly recommend them for your vehicle!

Jul 22, 2010 | 1998 Cadillac DeVille

2 Answers

What is the possible problem when my 98 deville rear suspension is jacked up to the top all the time? is there a way to reset it This occured after the last time I had the car in for repair and then...


I have seen this before. They put car on lift which lets suspension drop. When they set it back down the Air ride leveling rods get stuck and think they need to stay full. Like what was already mentioned, check your levelers located next to your suspension air bags to see if they are stuck.

Nov 14, 2009 | 1998 Cadillac DeVille

1 Answer

Rear shocks are causing car to be lifted high off the ground


the leveling switch on the rear suspension could be out of adjustment - it turns the pump on when rear is to low and turns off when level

Sep 28, 2009 | 1998 Cadillac DeVille

1 Answer

My 98 Cadillac DeVille rear air suspension system works great UNTIL I load weighted luggage in trunk and passengers in back seat. I then drive around for 15 to 45 minutes and thats when the rear end of the...


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.

Sep 19, 2009 | 1998 Cadillac DeVille

1 Answer

Adjusting my rear suspension


You can adjust the REAR air shock levels at the link by rear axle. Hope this helps

Apr 19, 2009 | 1998 Cadillac DeVille

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