Skyjacker 4" SYS 88-91 1/2T SUBURBAN

Maximum Height for Half Ton Suburban Off Road Builds

The Skyjacker C140AKSD8-N is a complete 4 inch suspension lift system designed for 1988 to 1991 Chevrolet and GMC half ton Suburban models. Built for owners who want to run 33 to 35 inch tires while keeping the Suburban predictable on pavement, this system pairs Skyjacker's 4 inch lift components with Nitro gas charged shock absorbers valved for the added travel. Skyjacker engineers the geometry of this kit to reduce body roll and control axle wrap so the added height does not come at the expense of drivability. The C140AKSD8-N uses factory mounting points along with a full hardware kit, making the installation a bolt on process for anyone comfortable with suspension work. This system is a popular choice for square body Suburban owners building a dedicated off road or overland setup.

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 the half ton Suburban chassis
• Controls body roll and axle wrap at the taller ride height
• Complete hardware kit for bolt on installation
• Supports aggressive 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 designed lift kits for trucks and SUVs for decades, matching lift height and shock valving so that added clearance does not come at the cost of predictable handling. The C140AKSD8-N carries that engineering to the half ton Suburban platform at a full 4 inches of lift.

Related Parts

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

FAQ

The C140AKSD8-N is a complete Skyjacker 4 inch suspension lift system for 1988 to 1991 Chevrolet and GMC half ton Suburban models, including lift components and Nitro shock absorbers.

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 no permanent cutting is required.

Skyjacker engineers the geometry to control body roll and axle wrap, though a 4 inch lift will change the Suburban's handling compared to stock ride height.

Yes, the C140AKSD8-N is sized for the half ton Suburban chassis from 1988 to 1991.

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.