Rough Country · Authorized Dealer
4 Inch Lift Kit | Chevy/gmc C20/k20 C25/k25 Truck/half-ton Suburban (77-91)
$549.95
Price does not include installation.
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🛠️ Install available in Marietta, GA
Installed and serviced at Road Runner Wheels & Tires — 1585 Roswell Rd, Marietta, GA 30062. Call (678) 400-6467 to schedule.
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Built for classic Chevy and GMC truck owners who want a leveled stance and room for 35-inch tires, Rough Country's 4-inch lift kit raises the front to match the rear, delivering a factory-like ride with an aggressive appearance. The kit includes premium N3 shocks tuned for both on- and off-road performance, plus all hardware needed for a complete suspension upgrade.
Installed and serviced at Road Runner Wheels & Tires. Most lift kits go in the same day. Call (678) 400-6467 to schedule.
What's included
- Lifted front leaf springs (qty 2) — raise the front end while maintaining ride quality and handling geometry.
- 4-inch rear lift blocks (qty 1 kit) — level the rear suspension to match front height.
- N3 series shock absorbers — 10-stage variable high-pressure nitrogen-charged shocks with 18mm spring-loaded piston rods and 54mm bodies for smooth highway ride and off-road capability.
- Steering arm — maintains correct caster angle after lift.
- Brake line relocation brackets — keeps brake lines at factory-correct angles.
- U-bolts and hardware — complete fastener kit for secure installation.
Important notes
- Vehicles equipped with a front sway bar should use drop brackets (sold separately, SKU: 1019) to maintain proper suspension geometry.
- Factory quad-shock setups (2 shocks per front side) will use a single aftermarket shock per side with this kit.
- Kit supports up to 35-inch tires with proper wheel backspacing — verify offset with your wheel choice.
Why customers pick this at Road Runner
- Rough Country lifetime warranty backed by local technicians who service these kits every week.
- Lifted leaf springs preserve ride quality while adding 4 inches of ground clearance.
- N3 shocks tuned for balanced on- and off-road performance — not a budget compromise.
- Professional installation includes brake-line routing and full alignment performed in-house.
- Mount and balance available on most kits means you drive home lifted the same day.
Ready to build it? Call (678) 400-6467. Hablamos Español.
| Qty | Part | Part # |
|---|---|---|
| 2 | 4in Spring | Chevy/GMC C10/K10 Truck (73-87)/Half-Ton Suburban (73-91) | 8002R |
| 1 | 3 4-Ton N3 4in Kit | GMC C25/K25 Pickup (77-87) GMC Half-Ton Suburban (77-91) | 115030 |
Features
- Increased ground clearance
- Includes application valved N3 series shock absorbers which offer the best in balanced performance for on and off-road use.
| Years | Make | Model | Drive |
|---|---|---|---|
| 1977-1980 | Chevrolet | K20 Custom Deluxe | 4WD |
| 1977-1981 | Chevrolet | K20 Cheyenne | 4WD |
| 1977-1986 | Chevrolet | K20 Scottsdale | 4WD |
| 1977-1986 | Chevrolet | K20 Silverado | 4WD |
| 1981 | Chevrolet | K20 Deluxe | 4WD |
| 1981-1986 | Chevrolet | K20 Custom | 4WD |
| 1977-1980 | Chevrolet | K20 Suburban Custom Deluxe | 4WD |
| 1977-1986 | Chevrolet | K20 Suburban Scottsdale | 4WD |
| 1977-1986 | Chevrolet | K20 Suburban Silverado | 4WD |
| 1981 | Chevrolet | K20 Suburban Deluxe | 4WD |
| 1981-1986 | Chevrolet | K20 Suburban Custom | 4WD |
| 1987 | Chevrolet | V20 Suburban Custom Deluxe | 4WD |
| 1987-1988 | Chevrolet | V20 Suburban Scottsdale | 4WD |
| 1987-1988 | Chevrolet | V20 Suburban Silverado | 4WD |
| 1989-1991 | Chevrolet | V2500 Suburban Scottsdale | 4WD |
| 1989-1991 | Chevrolet | V2500 Suburban Silverado | 4WD |
| 1977-1978 | GMC | K15 Suburban Base | 4WD |
| 1977-1978 | GMC | K15 Suburban High Sierra | 4WD |
| 1977-1978 | GMC | K15 Suburban Sierra Classic | 4WD |
| 1977-1978 | GMC | K15 Suburban Sierra Grande | 4WD |
| 1977-1978 | GMC | K25 Base | 4WD |
| 1977-1978 | GMC | K25 High Sierra | 4WD |
| 1977-1978 | GMC | K25 Sierra Classic | 4WD |
| 1977-1978 | GMC | K25 Sierra Grande | 4WD |
| 1979-1982 | GMC | K2500 Sierra Grande | 4WD |
| 1979-1986 | GMC | K2500 Base | 4WD |
| 1979-1986 | GMC | K2500 High Sierra | 4WD |
| 1979-1986 | GMC | K2500 Sierra Classic | 4WD |
- Tire size: 33″ to 35″ tall
- Lift height: 4″
| Tire | Wheel | Offset |
|---|---|---|
| 35x12.50R15 | 15x8 | -39mm |
| 35x12.50R15 | 15x8 | -19mm |
| 35x12.50R15 | 15x8 | -18mm |
| 35x12.50R15 | 15x8 | +0mm |
| 35x12.50R15 | 15x8 | +1mm |
| 35x12.50R15 | 15x10 | -39mm |
| 35x12.50R16 | 16x8 | -12mm |
| 35x12.50R16 | 16x8 | -6mm |
| 35x12.50R16 | 16x10 | -39mm |
| 35x12.50R17 | 17x9 | -12mm |
| 315/70R17 | 17x9 | -12mm |
| 305/70R17 | 17x9 | -12mm |
| 285/75R17 | 17x9 | -12mm |
| 35x12.50R17 | 17x9 | +0mm |
| 315/70R17 | 17x9 | +0mm |
| 305/70R17 | 17x9 | +0mm |
| 285/75R17 | 17x9 | +0mm |
| 35x12.50R17 | 17x9 | +1mm |
| 315/70R17 | 17x9 | +1mm |
| 305/70R17 | 17x9 | +1mm |
| 285/75R17 | 17x9 | +1mm |
| 35x12.50R17 | 17x9 | +18mm |
| 35x12.50R17 | 17x9 | +20mm |
| 35x12.50R18 | 18x9 | -12mm |
| 295/70R18 | 18x9 | -12mm |
| 285/75R18 | 18x9 | -12mm |
| 35x12.50R18 | 18x9 | +0mm |
| 35x12.50R18 | 18x9 | +1mm |
| 35x12.50R18 | 18x9 | +18mm |
| 35x12.50R18 | 18x9 | +20mm |
| 35x12.50R20 | 20x9 | -12mm |
| 35x11.50R20 | 20x9 | -12mm |
| 295/65R20 | 20x9 | -12mm |
| 295/60R20 | 20x9 | -12mm |
| 35x12.50R20 | 20x9 | +0mm |
| 295/60R20 | 20x9 | +0mm |
| 285/60R20 | 20x9 | +0mm |
| 35x12.50R20 | 20x9 | +1mm |
| 295/60R20 | 20x9 | +1mm |
| 285/60R20 | 20x9 | +1mm |
| 35x12.50R20 | 20x9 | +18mm |
| 35x12.50R20 | 20x9 | +20mm |
| 35x12.50R20 | 20x10 | -25mm |
| 35x12.50R20 | 20x10 | -19mm |
| 295/60R20 | 20x10 | -19mm |
| 285/60R20 | 20x10 | -19mm |
| 35x12.50R20 | 20x10 | -18mm |
| 295/60R20 | 20x10 | -18mm |
| 285/60R20 | 20x10 | -18mm |
| 35x12.50R22 | 22x10 | -25mm |
| 35x12.50R22 | 22x10 | -19mm |
| 285/55R22 | 22x10 | -19mm |
| 35x12.50R22 | 22x10 | -18mm |
| 285/55R22 | 22x10 | -18mm |
- Install time: 6 - 8 hours
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.
Rough Country Lifetime Replacement Warranty covers all structural components against defects in materials and workmanship for the original purchaser's lifetime ownership of the vehicle.
3-Year Finish Warranty on all painted and powder-coated surfaces.
3-Year Shock Warranty on N3, M1, and Vertex shocks against leakage and structural failure.
Warranty service is handled by Rough Country directly — call (678) 400-6467 if you need help opening a warranty claim and we'll walk you through it.
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