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★★★★★ 4.9 (625 Google reviews) · Marietta shop · 📞 (678) 400-6467 · 🗺️ Get Directions · Live From The Shop
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Rough Country · Authorized Dealer

6 Inch Lift Kit | 52 Inch Rr Springs | Chevy/gmc 3/4-ton Suburban/c25/k25 Truck (77-87)

Part #: 21030UPC: 843030145774Brand: Rough Country

$949.95

Price does not include installation.

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*Estimated lease-to-own payment. Final approval and terms are determined by the lender. See all financing options →

🛠️ 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 3/4-ton Chevy and GMC owners who want a level stance and aggressive ground clearance, this 6-inch lift kit raises your truck front and rear equally for a factory-proportioned look without sacrificing ride quality. The kit combines lifted leaf springs front and rear with Rough Country's premium N3 shocks—10-stage variable nitrogen-charged units tuned for both on and off-road performance. You'll clear up to 37-inch tires with proper wheel backspacing.

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

  • N3 Shock Pair (front) — 10-stage variable high-pressure nitrogen-charged shocks with 18mm spring-loaded piston rod and 54mm shock body for balanced on and off-road performance.
  • N3 Shock Pair (rear) — Matched rear shocks for level ride height and consistent damping.
  • 6-inch front leaf springs (qty 2) — Lifted springs that raise the front to match rear height while maintaining ride quality.
  • 6-inch rear leaf springs (qty 2) — Lifted springs that maintain factory-proportioned geometry and ride angles.
  • Raised steering arm — Corrects steering geometry after the lift to maintain proper caster and driveline angles.
  • Brake line relocation brackets — Reposition brake lines to safe angles and prevent stress after lift installation.
  • U-bolts and hardware — OEM-grade fasteners for secure spring and shock mounting.
  • Bushing kit — Polyurethane bushings for durable suspension articulation.

Important notes

  • This kit only fits models with 52-inch rear leaf springs. Verify your truck's rear spring length before purchase.
  • If your vehicle is equipped with a front sway bar, drop brackets are recommended (sold separately, SKU 1019) to prevent binding after the lift.
  • Vehicles with factory quad shocks (two front shocks per side) will use a single aftermarket N3 shock per side in this kit.

Why customers pick this at Road Runner

  • Rough Country's lifetime replacement warranty backed by local service — we stand behind every kit we install.
  • Professional alignment performed in-house as part of every lift install, ensuring your caster, camber, and steering geometry are corrected for long tire life.
  • Brake line drops handled correctly — no rubbing, no safety compromise after the lift.
  • Our techs install these kits every week on 3/4-ton Chevy and GMC trucks; they know the fitment and geometry cold.
  • Same-day installation available, so you drive out leveled and ready for bigger rubber.

Ready to build it? Call (678) 400-6467. Hablamos Español.

QtyPartPart #
1Universal U-Bolt Kit7616
26in Rear Leaf Spring | Chevy/GMC C10/K10 Truck & SUV/K5 Blazer 4WD (73-91)8028
1S800012bshing Kit | Chevy C20/K20 Pickup (73-87) GMC C15/K15 Pickup (73-87)6070
1Installation Kit | Chevy 3/4-Ton Suburban (88-91) Chevy C20/K20 Pickup (77-87)7511
1Raised Steering Arm | Chevy/GMC C10/K10 C15/K15 Truck/Half-Ton Suburban/K5 Blazer (69-91)6600
26in Front Leaf Spring | Chevy/GMC C10/K10 Truck & SUV/K5 Blazer 4WD (73-91)8015
1N3 Shock Pair23173
1N3 Shock Pair23174

Features

  • Increased ground clearance
  • Includes application valved N3 series shock absorbers which offer the best in balanced performance for on and off-road use.
YearsMakeModelDrive
1977-1980ChevroletK20 Custom Deluxe4WD
1977-1981ChevroletK20 Cheyenne4WD
1977-1986ChevroletK20 Scottsdale4WD
1977-1986ChevroletK20 Silverado4WD
1981ChevroletK20 Deluxe4WD
1981-1986ChevroletK20 Custom4WD
1977-1980ChevroletK20 Suburban Custom Deluxe4WD
1977-1986ChevroletK20 Suburban Scottsdale4WD
1977-1986ChevroletK20 Suburban Silverado4WD
1981ChevroletK20 Suburban Deluxe4WD
1981-1986ChevroletK20 Suburban Custom4WD
1987ChevroletV20 Suburban Custom Deluxe4WD
1987ChevroletV20 Suburban Scottsdale4WD
1987ChevroletV20 Suburban Silverado4WD
1977-1978GMCK25 Base4WD
1977-1978GMCK25 High Sierra4WD
1977-1978GMCK25 Sierra Classic4WD
1977-1978GMCK25 Sierra Grande4WD
1979-1982GMCK2500 Sierra Grande4WD
1979-1986GMCK2500 Base4WD
1979-1986GMCK2500 High Sierra4WD
1979-1986GMCK2500 Sierra Classic4WD
1979-1982GMCK2500 Suburban Sierra Grande4WD
1979-1986GMCK2500 Suburban Base4WD
1979-1986GMCK2500 Suburban High Sierra4WD
1979-1986GMCK2500 Suburban Sierra Classic4WD
1977-1978GMCK25 Suburban Base4WD
1977-1978GMCK25 Suburban High Sierra4WD
1977-1978GMCK25 Suburban Sierra Classic4WD
1977-1978GMCK25 Suburban Sierra Grande4WD
  • Tire size: 35″ to 37″ tall
  • Lift height: 6″
TireWheelOffset
37x13.50R1515x8-39mm
37x13.50R1515x8+0mm
37x13.50R1515x8+1mm
37x12.50R1717x9-12mm
37x12.50R1818x9-12mm
37x12.50R2020x9-12mm
  • Install time: 6 - 8 hours
ONLY fits models with 52" rear leaf springs. 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.