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

This 4-inch lift kit for the GMC 1 Ton 4WD trucks is a custom package that Jack-it has put together. 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 will add a 3.5-inch rear block with a u-bolt kit. All these options will, of course, include a front sway shackle correct kit. Optional Fox Adventure series monotube shocks are available for maximum ride comfort and control. Jack-it has included new front spring eye, shackle bolts, and bushings 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.

Features and Benefits

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

Package Includes:

• Front Softride leaf springs
• Rear 3.5 block kit
• Front spring eye and shackle bolts, nuts & washers
• Front upper shackle bushings
• Front Sway Bar Correction Shackle
• Black Max or Optional Fox Adventure series shocks
• Raised Steering Block w/studs and lock nuts
• Front and rear U-bolt kits

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.