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Rough Country

4 Inch Lift Kit

Chevy/GMC C20/K20 C25/K25 Truck/Half-Ton Suburban (77-91)

Rough Country 4 Inch Lift Kit | Chevy/GMC C20/K20 C25/K25 Truck/Half-Ton Suburban (77-91)

$549.95the kit

In stock at Rough Country · as of Sep 19

Tell us your truck and we'll check this kit against it.

4″ of lift 6 - 8 hours to install 54 tested tire setups
See it on my truck

Nothing is charged online. We confirm fitment and the final price on the call.

Before you buy

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.

Tires Rough Country fitted with this kit

Tested setups from the maker. Tap a tire size to shop it; a size we do not stock yet, we can quote on your call.

TireWheelBolt patternOffsetNote
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 · not stocked yet 16x8 8x6.5/8x165.1 -12
35x12.50R16 · not stocked yet 16x8 8x6.5/8x165.1 -6
35x12.50R16 · not stocked yet 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

About this kit

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 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.

Highlights

  • Increased ground clearance Includes application valved N3 series shock absorbers which offer the best in balanced performance for on and off-road use.

What's in the box

  • 2 × 4in Spring | Chevy/GMC C10/K10 Truck (73-87)/Half-Ton Suburban (73-91) Part #8002R
  • 1 × 3 4-Ton N3 4in Kit | GMC C25/K25 Pickup (77-87) GMC Half-Ton Suburban (77-91) Part #115030
FrontLifted leaf springs Steering arm Brake line relocation brackets U-bolts Hardware
Rear4" lift blocks U-bolts Hardware

Specifications

BrandRough Country
Part number150.20
UPC843030130015
Lift4″
Shipping weight161.29 lb
Country of originUSA
ShippingGround shipping only · Arrives in more than one box

Trucks it fits

All 11 fitments
TruckYearsDriveTrims
Chevrolet K20 1977–1981 4WD Cheyenne
Chevrolet K20 1977–1980 4WD Custom Deluxe
Chevrolet K20 1977–1986 4WD Scottsdale, Silverado
Chevrolet K20 1981–1986 4WD Custom
Chevrolet K20 1981 4WD Deluxe
Chevrolet K20 Suburban 1977–1980 4WD Custom Deluxe
Chevrolet K20 Suburban 1977–1986 4WD Scottsdale, Silverado
Chevrolet K20 Suburban 1981–1986 4WD Custom
Chevrolet K20 Suburban 1981 4WD Deluxe
GMC K2500 1979–1986 4WD Base, High Sierra, Sierra Classic
GMC K2500 1979–1982 4WD Sierra Grande
Exact SKU — the wheel you pick is the wheel we render True to size — fitment measured to the inch See it first — on your truck, before you spend a dollar