Existing Order Help: 866-998-8737
The file https://www.strutmasters.com/wp-content/uploads/2017/12/media-14779.jpg does not exists
1998-2004 Cadillac Seville Deluxe Rear Air Suspension Conversion Kit With Resistor (CADR11)
We are currently transitioning from red to black springs. Item may differ slightly from photo.

1998-2004 Cadillac Seville Deluxe Rear Air Suspension Conversion Kit With Resistor (CADR11)

$399.00Add to cart

For Special Shipping Options:

(866) 597-2397

Canadian Flag To Place an Order from Canada, Please Call 866-597-2397.


Kit Class: Premium Warranty: Lifetime

Convert Your Air Suspension To A Coil Spring Suspension. End Your Air Suspension Problems Forever...

Strutmasters 1998-2004 Cadillac Seville Rear Air Shock To Coil Spring Shock Conversion Kit is the perfect solution to your air suspension problems. Designed to be very affordable, you can convert your air suspension to use standard struts and coil springs for less than the price of replacing one electronic strut

This Conversion Kit Fits

1998 Cadillac Seville, 1999 Cadillac Seville, 2000 Cadillac Seville, 2001 Cadillac Seville, 2002 Cadillac Seville, 2003 Cadillac Seville, 2004 Cadillac Seville

Product Notes

  • IMPORTANT: If The Bottom of the Shock Absorber has Two Bolts, This Is The Kit You Need.
  • If the suspension warning light is currently on, call 866-597-2397 for more information prior to installation.
  • Made In USA
  • Limited Lifetime Warranty
  • Made With Glide Ride Technology


Vehicle Info

  • Year: 1998-2004
  • Make: Cadillac
  • Model: Seville
  • Manufacturer: Strutmasters

Air Suspension Conversion Kit Includes

These are the components and materials you can expect to find shipped with your new purchase.

  • 2 Rear Eibach Coil Springs
  • 2 Rear Premium Shocks
  • All Necessary Hardware
  • Detailed Instructions

Shipping Info

All of our products have shipping options available to guarantee you get your part in a timely and affordable manner.

  • Next Business Day: Delivery typically by 10:30 a.m.
  • 2 Business Days: Delivery typically by end of day
  • 1-5 Business Days: Delivery based on distance to destination
Tour Strutmasters

Manufactured, Packaged and
Shipped in North Carolina, USA

All of our conversion kits are manufactured, packaged and shipped from our warehouse right here in Roxoboro, NC, USA. We believe in providing the highest quality parts, such as premium american-made coil springs, to ensure our customers only need to buy the right product once.

Learn More About Us

Features & Benefits

Strutmasters Conversion Kits Save Money, Time and Headaches

1998-2004 Cadillac Seville Deluxe Rear Air Suspension Conversion Kit With Resistor (CADR11) is the perfect solution to your air suspension problems. Designed to be very affordable, you can convert your air suspension to use standard.

Our Conversion Kits are built to improve the performance and stability of your ride. Converting to a non-air suspension system gives you a more reliable ride.

Our kits don't require any major modifications to your vehicle to install.

Only Strutmasters offers premium american-made coil springs on our conversion kits. Notice the difference with a better, smoother ride!

All of our kits come with easy to install instructions so you or your mechanic can get your car up and running faster than ever.

Why Choose Strutmasters Instead Of Those Other Guys

Strutmasters' air to non-air suspension conversion kit is an affordable direct replacement solution to a failed or leaking air suspension system. Without sacrificing quality, the kit replaces the faulty air ride components for good. Made in the USA, the kit includes two rear shocks, two rear Eibach springs, new mounts, and all necessary hardware. The kit costs considerably less money than dealership direct replacement and individual part replacement. It is installed in as little as one hour per wheel thanks to easy-to-follow instructions and online installation videos. For further assistance, ASE certified experts offer technical support over the phone. Customers' investment is protected by Strutmasters' Lifetime Limited Warranty. It's no wonder that the majority of Seville owners make “the switch” from air to non-air suspension using this coilover conversion kit.

How Do I know If My Seville Air Suspension is failing?

If the 1998-2004 Cadillac Seville has an improper ride height, the air suspension system may be leaking or going bad. Early detection of a failing air suspension system is the key to maintaining the vehicle's overall health. Look for a sudden height variance between different sides of the Seville. Typically there will be one inflated end, one sagging end, a “squatting” appearance, or a shifting lean from side to side. Another classic symptom is an improperly working air compressor. If the air compressor runs too often or stops working, a bad suspension has caused it to wear out. The suspension needs to be fixed if there is an illuminated suspension warning light on the dashboard.


Overall Savings

How does this part compare to OEM parts and other competitive solutions?

  • $1,201

    in Savings

  • 75%

    Less Than Dealer

After Market Replacement Parts:

+ Struts ($234/strut)
+ Coil Spring ($189/coil spring)
+ Shock Absorber ($285/shock absorber)
+ Compressor and Dryer Assembly ($244)
= TOTAL: Over $1,600 (and that doesn’t even include replacing electronic components that are known to fail such as the height sensors).

Strutmasters Conversion Kit:

+ 2 x Rear Shocks
+ 2 Rear Eibach Springs
+ Detailed Installation Instructions
+ Over-the-phone technical support and a Limited Lifetime Warranty =

Our Price: $399.00!

Suspension Components List

The 1998-2004 Cadillac Seville is built with the following suspension components:

1998-2004 Cadillac Seville Electronic Struts (x2)- a type of shock absorber; has metal tubing filled with gas-charged hydraulic fluid that is connected to the wheel of a vehicle in order to reduce the effects of vertical travel on a rough surface which controls the bounciness, and therefore comfort, of a vehicle. The Cadillac Deville’s struts, while having coil-springs, use an electronic signal to stiffen or soften the dampening of the strut.

1998-2004 Cadillac Seville Shock Absorbers (x2)- a metal tubing filled with gas-charged hydraulic fluid that is connected to the wheel of a vehicle in order to reduce the effects of vertical travel on a rough surface which controls the bounciness, and therefore comfort, of a vehicle shock absorbers.

1998-2004 Cadillac Seville Coil Springs (x2)- Coil springs hold the vehicle up but be careful, they are rated for and designed to work with the rest of the suspension system, so when you change air shocks to passive shocks, then you will need a different rated coil spring that works well with the new type of shocks.

1998-2004 Cadillac Seville Air Lines- tubes that run from a compressor (air suspension) to the air struts which carry pressurized air to the air bags components in order to adjust the height of the vehicle, respectively.

1998-2004 Cadillac Seville Solenoids (x4)- usually L-shaped, these plastic components connect the electrical connection and lines of suspension components to the suspension control module on vehicles with active suspension. The solenoid regulates the air pressure for each air spring. Solenoids start to leak as they wear out causing the vehicle to sag or to lean. This will cause the ride height sensor to send a signal to activate the compressor in an attempt to inflate the air suspension and level out the vehicle. This excessive work load will eventually lead to total failure of the compressor.

1998-2004 Cadillac Seville Compressor- creates/sends pressurized to active suspension components. When the air suspension starts leaking, the compressor/pump starts working harder to try to keep the system inflated. By the time air suspension leaks down completely, sitting the vehicle on its tires, the compressor will either have failed or be well on its way to full failure. Buying replacement struts and taking the time to install them only to find out the compressor still needs to be replaced can be very frustrating, time-consuming, and expensive.

1998-2004 Cadillac Seville Dryer Assembly- used to keep moisture out of air lines and air springs in order to prevent freezing and internal cracking of these parts. Once air suspension starts leaking, moisture will build-up throughout the air system. Moisture damages the air suspension from the inside. The dryer will need to be replaced in order to eliminate the moisture and prevent any further damage.

1998-2004 Cadillac Seville Suspension Control Module- a computer which is responsible for the operations of the air suspension system and maintaining the vehicle’s correct ride height.

1998-2004 Cadillac Seville O-rings- Although they are the least expensive parts of the air suspension, they are responsible for maintaining the seal where all of the air lines connect. Be sure to replace the O-rings when repairing any air suspension system.

Performance You Can’t Find Elsewhere
Made With Premium American-Made Coil Springs

American Made Parts,
Unrivaled Quality

Get Your Parts When You Need Them
Fast Shipping Guaranteed

Professional Assistance and ASE Certified Tech Support
Those Other Guys Don't Offer


Real Customers, Real Reviews

Read reviews from people just like you looking for the perfect solution for their suspension needs.

Name: | Location: CARTHAGE Missouri | SKU: CADR11

Got the kit in and installed it myself with minimal problems. Rear end does ride a little high but the ride is smoother than my worn out air shocks. Coil springs were a little difficult to get in but once they are in everything else goes by quickly. I’ll definitely be getting the front struts in the future as well.

Name: | Location: Hawarden, Iowa | SKU: CADR11

I ordered the rear strut kit to replace the factory air shocks on my son’s 2003 Cadillac Seville. I was somewhat reluctant to do so after reading a previous post that said they raised the car height on his car….. they didn’t though. I am totally happy with my purchase. The total time to replace the rear shocks was about 3-1/2 hours and most of the time was spent getting the old ones off!! (Someone walked away with our spring compressor, so we ended up torching the old springs off.)

Satisfaction Reasons; First, the price for this conversion kit was about 13% of the price of ordering the original air shocks. I saved thousands!! Second, the rear bumper height only raised 3/4″ (not 2-3″ like I’ve read by some posters) which is probably where it should have been if the old shocks were still in good shape. Third, I have noticed no change in the ride of the car. I’ll post before & after pictures.

Again, I am totally satisfied and if I had to do it all over again, I would buy the same conversion kit from Strutmasters……

Name: | Location: FINLAND  | SKU: CADR11

“Dont waste your money buy the normal ones!
If you dont want to drive a high aced seville”

Submit a Review »

Ready to Order

Don't wait another minute to get your vehicle running in top condition. Order now to save big!

$399.00Add to cart

Call an Expert To Top

Contact Us

Tech: 866-998-8737
Toll Free: 866-597-2397
Tech: 866-998-8737
Monday – Friday: 8AM-10PM
Saturday: 8AM-8PM

Our Company

Strutmasters, L.L.C. Is Not Responsible For Typographical Errors On This Site. Strutmasters, L.L.C., 118 Commerce Drive, Roxboro, NC 27573 © 2019 Strutmasters, L.L.C. All rights reserved. Logos and Trademarks are the property of their respective owners | © Strutmasters