Monroe
Air Spring to Coil Spring Conversion Kit

Monroe 90018C Coil Spring Set - Rear

Brand Monroe 90018C
Position Rear
Product line Air Spring to Coil Spring Conversion Kit
Fits Chevrolet, GMC, and Isuzu · 23 vehicles

Air suspension conversion. Converts factory air suspension to a conventional suspension setup.

Premium components. Includes application-tuned shock or strut, coil spring(s), and hardware.

Passive design. Built as a non-adjustable suspension conversion kit.

Cross-references Monroe Shocks & Struts 90018C for the same application. See all 1.

$293.27Free shipping
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Order total $293.27
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Monroe 90018C Rear Suspension Conversion Kit

The Monroe Air Spring to Coil Spring Conversion Kit converts a factory rear air suspension to a conventional coil spring setup. Built as a premium-grade suspension conversion solution, it includes an application-tuned shock/strut, coil spring(s), and related components for the listed vehicles.

Key Features

  • Converts rear air suspension to a conventional coil spring suspension
  • Premium grade suspension conversion kit
  • Application-tuned shock/strut included for the listed fitments
  • Passive suspension design
  • Direct fit for rear applications on select Chevrolet, GMC, and Isuzu models

Product Details

Monroe 90018C is part of the Monroe Air Spring to Coil Spring Conversion Kit line, created for drivers who need to replace a factory rear air suspension system with a conventional spring-based setup. This kit is engineered for rear use only and is listed for 2002-2006 Chevrolet Trailblazer EXT, 2002-2006 GMC Envoy XL, 2004-2005 GMC Envoy XUV, and 2003-2006 Isuzu Ascender. It is a practical suspension service option for restoring a simpler rear suspension layout on these vehicles.

This part cross-references Monroe Shocks & Struts (e.g., 90018C) for the same application.

What It Helps Address

  • Rear air suspension failure or loss of ride support
  • Compressor cycling caused by leaking air suspension components
  • Uneven rear ride height on Chevrolet Trailblazer EXT and GMC Envoy XL models
  • Need to convert a rear air system to a conventional coil spring suspension
  • Suspension service on Isuzu Ascender and GMC Envoy XUV rear applications

Installation Notes

Fits 2002-2006 Chevrolet Trailblazer EXT, rear. Fits 2002-2006 GMC Envoy XL, rear. Fits 2004-2005 GMC Envoy XUV, rear. Fits 2003-2006 Isuzu Ascender, rear. This conversion kit is for the rear suspension only and requires one kit per vehicle. Mounting hardware is not listed as included. Verify vehicle configuration and rear suspension type before installation.

Quality Assurance

Monroe 90018C is a premium-grade suspension conversion kit from Monroe, a recognized name in shocks, struts, and suspension components. The kit is built around application-specific components for the listed rear air-to-coil conversion applications.

This part fits 23 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelWheel BasePositionNotes
2006ChevroletTrailblazer EXTRearAir Spring to Coil Spring Conversion Kit
2006GMCEnvoy XLRearAir Spring to Coil Spring Conversion Kit
2006GMCEnvoy XLRearConversion Kit Converts ONLY The Rear Air Suspension To A Coil Spring Suspension. Requires One Kit Per Vehicle; Air Spring to Coil Spring Conversion Kit
2006IsuzuAscender129.0"RearAir Spring to Coil Spring Conversion Kit
2005ChevroletTrailblazer EXTRearAir Spring to Coil Spring Conversion Kit
2005GMCEnvoy XLRearAir Spring to Coil Spring Conversion Kit
2005GMCEnvoy XLRearConversion Kit Converts ONLY The Rear Air Suspension To A Coil Spring Suspension. Requires One Kit Per Vehicle; Air Spring to Coil Spring Conversion Kit
2005GMCEnvoy XUVRearConversion Kit Converts ONLY The Rear Air Suspension To A Coil Spring Suspension. Requires One Kit Per Vehicle; Air Spring to Coil Spring Conversion Kit
2005GMCEnvoy XUVRearAir Spring to Coil Spring Conversion Kit
2005IsuzuAscender129.0"RearAir Spring to Coil Spring Conversion Kit
2004ChevroletTrailblazer EXTRearAir Spring to Coil Spring Conversion Kit
2004GMCEnvoy XLRearAir Spring to Coil Spring Conversion Kit
2004GMCEnvoy XLRearConversion Kit Converts ONLY The Rear Air Suspension To A Coil Spring Suspension. Requires One Kit Per Vehicle; Air Spring to Coil Spring Conversion Kit
2004GMCEnvoy XUVRearConversion Kit Converts ONLY The Rear Air Suspension To A Coil Spring Suspension. Requires One Kit Per Vehicle; Air Spring to Coil Spring Conversion Kit
2004GMCEnvoy XUVRearAir Spring to Coil Spring Conversion Kit
2004IsuzuAscender129.0"RearAir Spring to Coil Spring Conversion Kit
2003ChevroletTrailblazer EXTRearAir Spring to Coil Spring Conversion Kit
2003GMCEnvoy XLRearAir Spring to Coil Spring Conversion Kit
2003GMCEnvoy XLRearConversion Kit Converts ONLY The Rear Air Suspension To A Coil Spring Suspension. Requires One Kit Per Vehicle; Air Spring to Coil Spring Conversion Kit
2003IsuzuAscender129.0"RearAir Spring to Coil Spring Conversion Kit
2002ChevroletTrailblazer EXTRearAir Spring to Coil Spring Conversion Kit
2002GMCEnvoy XLRearAir Spring to Coil Spring Conversion Kit
2002GMCEnvoy XLRearConversion Kit Converts ONLY The Rear Air Suspension To A Coil Spring Suspension. Requires One Kit Per Vehicle; Air Spring to Coil Spring Conversion Kit
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Monroe Shocks & Struts — 90018C