Skyjacker 4"SYS 88091 1/2T SUB/52"SPR

Full 4 Inch Height Built Around the 52 Inch Rear Spring

The Skyjacker C140AKSS8-N is a complete 4 inch suspension lift system designed for 1988 to 1991 Chevrolet and GMC half ton Suburban models equipped with 52 inch rear leaf springs. This system gives Suburban owners the clearance to run 33 to 35 inch tires while Skyjacker tunes the front and rear geometry to work specifically with the longer rear spring configuration. The kit includes Nitro gas charged shock absorbers valved for the 4 inch lift height along with all necessary front and rear lift components. Skyjacker built the C140AKSS8-N to maintain predictable handling and reduce axle wrap under load, which matters for a full size half ton Suburban carrying passengers or cargo. Installation relies on factory mounting locations and the included hardware kit for a bolt on process.

Key Features

• 4 inch lift height for 33 to 35 inch tire clearance
• Includes Nitro gas charged shock absorbers front and rear
• Engineered specifically for 52 inch rear spring half ton Suburban models
• Reduces axle wrap and body roll at the taller ride height
• Complete hardware kit for bolt on installation
• Supports larger wheel and tire packages for off road use

Fitment Table

Specifications

What's Included

• Front and rear lift components sized for the 4 inch system
• Nitro shock absorbers, front and rear
• U-bolt kit
• Bushing kit
• Mounting hardware

About Skyjacker

Skyjacker Suspensions has engineered suspension lift systems for trucks and SUVs for decades, matching lift components and shock valving to specific chassis and spring configurations. The C140AKSS8-N applies that engineering to half ton Suburban models running the longer 52 inch rear spring.

Related Parts

• Skyjacker 2.5 inch lift systems for half ton Suburban with 52 inch springs
• Skyjacker Nitro shock absorbers

FAQ

The C140AKSS8-N is a complete Skyjacker 4 inch suspension lift system for 1988 to 1991 half ton Suburban models with 52 inch rear leaf springs, including matched lift components and Nitro shock absorbers.

The C140AKSS8-N is specifically sized for Suburban models equipped with the longer 52 inch rear leaf spring rather than the standard length spring.

This 4 inch lift system typically supports 33 to 35 inch tires depending on wheel width and backspacing.

Yes, Nitro gas charged shock absorbers are included front and rear, valved for the 4 inch lift height.

Yes, the kit uses factory mounting points with included hardware and does not require permanent cutting.

Skyjacker engineers this system to help control axle wrap and body roll compared to a generic lift, which benefits a loaded half ton Suburban.

The kit includes a U-bolt kit, bushing kit, and all mounting hardware needed for installation.

Yes, detailed installation instructions ship with every Skyjacker suspension lift system.

Install Instructions

1. Park the Suburban on level ground and support the frame with jack stands at the OEM lift points.
2. Remove the front and rear wheels.
3. Support the front and rear axles with a floor jack to relieve suspension tension.
4. Remove the factory shocks, springs and related mounting hardware.
5. Install the new Skyjacker lift components at the front and rear per the included instructions.
6. Install the Nitro shocks at the upper and lower mounts using factory and supplied hardware.
7. Reinstall the wheels and lower the vehicle to the ground.
8. Torque all hardware to specification and recheck after the first 100 miles.

Prop 65 Warning

California residents: This product can expose you to chemicals known to the State of California to cause cancer or birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov.