Zone Offroad C21N 6-Inch Leaf Spring Suspension Lift Kit for 88-91 Chevy/GMC K1500 SUV 4WD

The Zone Offroad C21N is a complete 6-inch leaf spring suspension lift kit engineered specifically for 4WD 1988–1991 Chevrolet and GMC half-ton SUVs, including the Blazer, Suburban 1500, and GMC Jimmy. Developed through extensive testing, this kit delivers a significant lift with improved off-road capability while maintaining a comfortable, street-friendly ride.

Front Suspension:

• Heavy-duty 5-leaf front replacement spring pack with anti-friction pads and center leaf spacer plates between each leaf
• Low-friction leaf pack design provides a smooth, consistent spring rate
• 4-inch steering arm included to correct drag link angle post-lift
• Front and rear brake line relocation brackets allow reuse of factory brake lines
• Yellow zinc-plated U-bolts with high nuts and washers included

Rear Suspension:

• 4-inch lift block and add-a-leaf combination achieves 5–6 inches of rear lift
• Rear add-a-leaf improves load capacity alongside increased ride height
• Longer rear U-bolts included for proper installation and level stance

Additional Notes:

• Estimated installation time: approximately 4 hours
• Vehicles equipped with factory auxiliary front shocks will require auxiliary shocks purchased separately
• On some models, the front driveshaft may need to be clearanced at the double cardan joint to prevent binding

The Zone Offroad C21N gives your classic Chevy or GMC SUV an aggressive stance and the clearance needed to run up to 37-inch tires, making it an ideal upgrade for serious off-road enthusiasts and daily drivers alike.