4" 1977-1991 GMC 1 ton Pickup 4WD Premium Lift Kit by Jack-It

This 4-inch Premium lift kit for the Chevrolet/GMC 1 Ton 4WD trucks is a custom package that Jack-it has put together. It was designed by our suspension experts, who have decades of experience (since 1994) selling, installing, and servicing suspension lift kits. Using our expert knowledge, we have crafted more complete suspension lift kits using high-quality components from various top brands in the aftermarket suspension market. This provides our valued customers with a better and simpler experience.

These kits have been specifically designed for the exact year of your GM 1 ton 4WD, with proper U-bolt sizes front and rear, all kits include Skyjacker softride front leaf springs. These lift packages contain 56’’ replacement rear leaf springs and U-bolt kits. All these options will consist of a front sway shackle correct kit with new poly swaybar bushings. Optional Fox Adventure series monotube shocks are available for maximum ride comfort and control. Jack-it has included new front & rear spring eye and shackle bolts, bushings, and new rear shackles with this package. It makes the installation much easier, and 30 to 50 year-old bolts and bushings are rarely in good shape to reuse.

GM 1-ton trucks have a 4-bolt trunnion-style D60 front axle. Jack-it includes a raised steering block to correct the draglink angle. We also include new, longer studs and locknuts to complete the steering correction installation. Extended Stainless steel brake hoses will ensure that you don’t overstretch old brake hoses in an off-road situation.

Top Features and Benefits

• Increases tire clearance
• Replaces worn front and rear leaf springs
• Top quality components
• Complete kit (includes parts not found in most kits on the market)
• Allows the use of larger diameter tires

Kit Includes

• Front and Rear Leaf Springs
• (4) Skyjacker BlackMax Shocks w/boots or Fox 2.0 Adventure Series Shocks
• Spring and Shackle Bushings
• Rear Replacement Shackles
• Front & Rear Spring Eye Bolt Kits
• Front and Rear U-Bolts
• Front and Rear Stainless Steel Braided Extended Brake Lines
• Raise Steering Block
• Front Sway Bar Shackle link Extension Kit
• Front Sway Bar Bushings

Installation Notes:

These kits are designed to fit the single wheel GM 1 ton 4wd models. All the front components will install on a dual rear wheel vehicle. The rear components may or may not work on the dual rear wheel vehicles.