4" Lift Kit - Chevy/GMC 77-91
4 Inch Lift Kit | Chevy/GMC C20/K20 C25/K25 Truck/Half-Ton Suburban (77-91)
Give your truck an impressive upgrade, front to back with Rough Country's 4" GM suspension lift kit! This easy-to-install lift kit raises the front of your vehicle to be equal height with the rear for a leveled, better-than-stock look that gives an improved ride height and more aggressive appearance. This kit features a set of front lifted leaf springs allowing you to gain additional ride height without sacrificing ride quality or performance.
A set of rear blocks and brake line brackets are provided to keep everything at optimum angles for a factory-like ride, even after lifting. A set of Rough Country's premium N3 shocks are also included. These fine tuned 10-stage variable high-pressure nitrogen charged shocks offer a fantastic blend of off-road action and smooth highway ride quality.
With a durable 18mm spring-loaded piston rod and faster-cooling 54mm shock body. Get the wheels you want! Rough Country's 4" GM suspension lift kit comes with everything you need to fit up to a 35" tire with proper wheel backspacing. Best of all, Rough Country's 4" GM suspension lift kit is backed by our lifetime replacement warranty.
Vehicle fitment & tire options
Vehicle fitment
- 1977-1978 GMC K25 (4WD)
- 1979-1986 GMC K2500 (4WD)
- 1977-1986 Chevy K20 Suburban (4WD)
- 1989-1991 Chevy V2500 Suburban (4WD)
- 1977-1986 Chevy K20 (4WD)
- 1977-1978 GMC K15 Suburban (4WD)
- 1987-1988 Chevy V20 Suburban (4WD)
Tire / wheel / bolt pattern / offset / notes
35x12.50R15 / 15x8 / 8x6.5/8x165.1 / -39 / Trimming Required
35x12.50R15 / 15x8 / 8x6.5/8x165.1 / -19 / -
35x12.50R15 / 15x8 / 8x6.5/8x165.1 / -18 / -
35x12.50R15 / 15x8 / 8x6.5/8x165.1 / +0 / -
35x12.50R15 / 15x8 / 8x6.5/8x165.1 / +1 / -
35x12.50R15 / 15x10 / 8x6.5/8x165.1 / -39 / Trimming Required
35x12.50R16 / 16x8 / 8x6.5/8x165.1 / -12 / -
35x12.50R16 / 16x8 / 8x6.5/8x165.1 / -6 / -
35x12.50R16 / 16x10 / 8x6.5/8x165.1 / -39 / Trimming Required
35x12.50R17 / 17x9 / 8x6.5/8x165.1 / -12 / -
315/70R17 / 17x9 / 8x6.5/8x165.1 / -12 / -
305/70R17 / 17x9 / 8x6.5/8x165.1 / -12 / -
285/75R17 / 17x9 / 8x6.5/8x165.1 / -12 / -
35x12.50R17 / 17x9 / 8x6.5/8x165.1 / +0 / -
315/70R17 / 17x9 / 8x6.5/8x165.1 / +0 / -
305/70R17 / 17x9 / 8x6.5/8x165.1 / +0 / -
285/75R17 / 17x9 / 8x6.5/8x165.1 / +0 / -
35x12.50R17 / 17x9 / 8x6.5/8x165.1 / +1 / -
315/70R17 / 17x9 / 8x6.5/8x165.1 / +1 / -
305/70R17 / 17x9 / 8x6.5/8x165.1 / +1 / -
285/75R17 / 17x9 / 8x6.5/8x165.1 / +1 / -
35x12.50R17 / 17x9 / 8x6.5/8x165.1 / +18 / -
35x12.50R17 / 17x9 / 8x6.5/8x165.1 / +20 / -
35x12.50R18 / 18x9 / 8x6.5/8x165.1 / -12 / -
295/70R18 / 18x9 / 8x6.5/8x165.1 / -12 / -
285/75R18 / 18x9 / 8x6.5/8x165.1 / -12 / -
35x12.50R18 / 18x9 / 8x6.5/8x165.1 / +0 / -
35x12.50R18 / 18x9 / 8x6.5/8x165.1 / +1 / -
35x12.50R18 / 18x9 / 8x6.5/8x165.1 / +18 / -
35x12.50R18 / 18x9 / 8x6.5/8x165.1 / +20 / -
35x12.50R20 / 20x9 / 8x6.5/8x165.1 / -12 / -
35x11.50R20 / 20x9 / 8x6.5/8x165.1 / -12 / -
295/65R20 / 20x9 / 8x6.5/8x165.1 / -12 / -
295/60R20 / 20x9 / 8x6.5/8x165.1 / -12 / -
35x12.50R20 / 20x9 / 8x6.5/8x165.1 / +0 / -
295/60R20 / 20x9 / 8x6.5/8x165.1 / +0 / -
285/60R20 / 20x9 / 8x6.5/8x165.1 / +0 / -
35x12.50R20 / 20x9 / 8x6.5/8x165.1 / +1 / -
295/60R20 / 20x9 / 8x6.5/8x165.1 / +1 / -
285/60R20 / 20x9 / 8x6.5/8x165.1 / +1 / -
35x12.50R20 / 20x9 / 8x6.5/8x165.1 / +18 / -
35x12.50R20 / 20x9 / 8x6.5/8x165.1 / +20 / -
35x12.50R20 / 20x10 / 8x6.5/8x165.1 / -25 / -
35x12.50R20 / 20x10 / 8x6.5/8x165.1 / -19 / -
295/60R20 / 20x10 / 8x6.5/8x165.1 / -19 / -
285/60R20 / 20x10 / 8x6.5/8x165.1 / -19 / -
35x12.50R20 / 20x10 / 8x6.5/8x165.1 / -18 / -
295/60R20 / 20x10 / 8x6.5/8x165.1 / -18 / -
285/60R20 / 20x10 / 8x6.5/8x165.1 / -18 / -
35x12.50R22 / 22x10 / 8x6.5/8x165.1 / -25 / -
35x12.50R22 / 22x10 / 8x6.5/8x165.1 / -19 / -
285/55R22 / 22x10 / 8x6.5/8x165.1 / -19 / -
35x12.50R22 / 22x10 / 8x6.5/8x165.1 / -18 / -
285/55R22 / 22x10 / 8x6.5/8x165.1 / -18 / -Features
- Increased ground clearance
- Includes application valved N3 series shock absorbers which offer the best in balanced performance for on and off-road use.
Product specifications
Product category: Susp Lift Kits 4wd
Manufacturer: Rough Country
Manufacturer part number: 150.20
UPC: 843030130015
Country of origin: United States
Manufacturer-listed weight: 161.29 lbs
Product notes & installation
If vehicle is equipped with a front sway-bar, drop brackets are recommended.
(sku
1019) vehicles with factory quad shocks (2 front shocks per side) will simply use a single aftermarket shock.Estimated installation time: 6 - 8 hours
Included components
Front components
- Lifted leaf springs
- Steering arm
- Brake line relocation brackets
- U-bolts
- Hardware
Rear components
- 4" lift blocks
- U-bolts
- Hardware
Refund Policy
Returns accepted within 30 days of purchase. Items must be unused, in original packaging, and include proof of purchase. Restocking fees may apply. Non-returnable items: custom orders, electrical parts, and used products. For full details, visit our Refund Policy page.
