Unity 11420 Suspension Strut and Coil Spring Assembly - Front

Front Strut Assembly for GM B-Body Applications

Unity 11420 is a pre-assembled front suspension strut and coil spring assembly built for direct replacement on select 1985-1990 GM full-size cars. It arrives fully assembled with the coil spring and top mount in place, helping reduce teardown time during suspension service.

Compatible with front applications on Buick LeSabre, Cadillac DeVille, Cadillac Fleetwood, Oldsmobile 98, Oldsmobile Delta 88, and Pontiac Bonneville, this Unity 11420 assembly is a practical OE-style replacement for vehicles using a strut with an L-shaped lower spring seat bracket.

Key Features

• Pre-assembled complete strut assembly with coil spring and top mount
• Ready-to-install design for plug-and-play service
• Built to OEM specifications for the listed applications
• Front position replacement for select 1985-1990 GM models
• Compressed length: 11.47 in; extended length: 18.52 in; travel length: 7.05 in
• Body length: 10.84 in
• Part number 11420 for easy identification

Product Details

Unity Automotive has more than 40 years of aftermarket suspension manufacturing experience, and this assembly reflects that focus on direct-fit suspension service. The Unity 11420 is engineered for front-end replacement on 1985-1990 Cadillac DeVille and Fleetwood, 1986-1990 Buick LeSabre and Oldsmobile Delta 88, 1985-1990 Oldsmobile 98, and 1987-1990 Pontiac Bonneville. For shoppers searching for a front strut assembly for a 1990 Cadillac DeVille or a complete front strut and coil spring assembly for a Buick LeSabre, this part number 11420 is the relevant match.

This part cross-references Monroe Shocks & Struts (e.g., 181822) for the same application.

Common Problems This Part Can Address

• Worn or noisy front strut assembly
• Loss of ride control from a fatigued coil spring
• Front-end clunking caused by a deteriorated top mount
• Uneven suspension response on aging GM full-size cars
• Time-consuming spring transfer during strut replacement

Installation Notes

Verify that the vehicle uses the strut with an L-shaped lower spring seat bracket before ordering. This assembly is for the front position only and should be matched to the listed year, make, and model before installation. Because it is pre-assembled, it reduces the need to compress and transfer the spring during service.

Quality Assurance

Unity builds this suspension assembly to OEM specifications and backs its aftermarket suspension lineup with a customer satisfaction commitment. The brand’s long-standing focus on suspension components supports consistent fitment and service confidence for the listed applications.