Skip to content
★★★★★ 4.9 (625 Google reviews) · Marietta shop · 📞 (678) 400-6467 · 🗺️ Get Directions · Live From The Shop
Google ★★★★★ Loading recent review… See all 625 →
Cart

Rough Country · Authorized Dealer

4 Inch Lift Kit | Chevy/gmc C10/k10 Truck & Suv/k5 Blazer 4wd (1977-1991)

Part #: 145.20UPC: 843030129996Brand: Rough Country

$599.95

Price does not include installation.

Pay over time

*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.

Loading stock…
Call (678) 400-6467

Built for classic Chevy and GMC truck owners who want a rugged stance with better ground clearance, this 4-inch lift kit raises your C10/K10 pickup, Suburban, or K5 Blazer while maintaining factory-like ride quality. You'll gain up to 35-inch tire clearance and improved off-road capability — all with corrected steering geometry to preserve drivability after install.

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

  • 4-inch Box Kit N3 — The structural foundation for your lift, engineered to fit GMC C15/K15 pickups and half-ton Suburbans (1977–1987).
  • 4-inch Lifted Leaf Springs (qty 2) — Application-specific front springs that deliver increased ground clearance without sacrificing ride comfort or control.
  • N3 Series Shocks — Valved for your exact application with a 10-stage variable system, high-pressure nitrogen charge, and 54mm body designed for balanced on-road smoothness and off-road control.
  • Raised Steering Arm — Corrects steering geometry for precise handling and improved alignment after lift installation.
  • Rear Lift Blocks & Brake Line Brackets — Maintain proper driveline geometry and safe brake function throughout the lift.

Important notes

  • If your vehicle is equipped with a front sway bar, drop brackets are recommended (SKU: 1019).
  • Optional replacement rear lifted leaf springs are available for a complete suspension upgrade; rear spring size must be confirmed by measuring eyelet to eyelet.
  • Vehicles with factory quad shocks (2 front shocks per side) will use a single aftermarket shock per side after installation.
  • Proper backspacing is required to safely run 35-inch tires; confirm wheel offset before finalizing tire selection.

Why customers pick this at Road Runner

  • Corrected steering geometry and caster alignment included — your truck handles tight and responsive after we finish.
  • Rough Country Limited Lifetime Warranty backed locally — peace of mind for years of driving.
  • Professionally installed by technicians who do these C10/K10 lifts every week.
  • Alignment performed in-house as part of every lift install — no separate trip needed.

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

QtyPartPart #
24in Spring | Chevy/GMC C10/K10 Truck (73-87)/Half-Ton Suburban (73-91)8002R
14in Box Kit N3 | GMC C15/K15 Pickup (77-87) GMC Half-Ton Suburban (77-91)114530

Features

  • Boosted Ground Clearance: Gain the extra height needed for better off-road capability and obstacle clearance.
  • Application-Specific Front Leaf Springs: Engineered for a perfect fit and optimal ride quality.
  • Optional Rear Leaf Springs: Available with replacement rear springs for a complete suspension upgrade.
  • Clears 35-Inch Tires: Provides ample room to run up to a 35" tall tire with no rubbing.
  • Raised Steering Arm Included: Corrects steering geometry for precise handling and improved alignment.
  • Premium N3 Series Shocks: Includes application-valved N3 shock absorbers for balanced on-road comfort and off-road control.
YearsMakeModelDrive
1987ChevroletBlazer Custom Deluxe4WD
1987-1991ChevroletBlazer Silverado4WD
1988-1991ChevroletBlazer Scottsdale4WD
1977-1980ChevroletK10 Custom Deluxe4WD
1977-1981ChevroletK10 Cheyenne4WD
1977-1986ChevroletK10 Scottsdale4WD
1977-1986ChevroletK10 Silverado4WD
1981ChevroletK10 Deluxe4WD
1981-1986ChevroletK10 Custom4WD
1977-1980ChevroletK10 Suburban Custom Deluxe4WD
1977-1986ChevroletK10 Suburban Scottsdale4WD
1977-1986ChevroletK10 Suburban Silverado4WD
1981ChevroletK10 Suburban Deluxe4WD
1981-1986ChevroletK10 Suburban Custom4WD
1977-1980ChevroletK5 Blazer Cheyenne4WD
1977-1980ChevroletK5 Blazer Custom Deluxe4WD
1978-1986ChevroletK5 Blazer Silverado4WD
1981ChevroletK5 Blazer Deluxe4WD
1981-1986ChevroletK5 Blazer Custom4WD
1984ChevroletK5 Blazer Scottsdale4WD
1987ChevroletV10 Custom Deluxe4WD
1987ChevroletV10 Scottsdale4WD
1987ChevroletV10 Silverado4WD
1987ChevroletV10 Suburban Custom Deluxe4WD
1987-1988ChevroletV10 Suburban Scottsdale4WD
1987-1988ChevroletV10 Suburban Silverado4WD
1989-1991ChevroletV1500 Suburban Scottsdale4WD
1989-1991ChevroletV1500 Suburban Silverado4WD
1977-1982GMCJimmy Sierra Grande4WD
1977-1985GMCJimmy High Sierra4WD
1977-1990GMCJimmy Sierra Classic4WD
1977-1991GMCJimmy Base4WD
1977GMCK15 Indy Hauler4WD
1977-1978GMCK15 Base4WD
1977-1978GMCK15 High Sierra4WD
1977-1978GMCK15 Sierra Classic4WD
1977-1978GMCK15 Sierra Grande4WD
1979-1982GMCK1500 Sierra Grande4WD
1979-1986GMCK1500 Base4WD
1979-1986GMCK1500 High Sierra4WD
1979-1986GMCK1500 Sierra Classic4WD
1977-1978GMCK15 Suburban Base4WD
1977-1978GMCK15 Suburban High Sierra4WD
1977-1978GMCK15 Suburban Sierra Classic4WD
1977-1978GMCK15 Suburban Sierra Grande4WD
1987GMCV1500 Base4WD
1987GMCV1500 High Sierra4WD
1987GMCV1500 Sierra Classic4WD
  • Tire size: 33″ to 35″ tall
  • Lift height: 4″
If vehicle is equipped with a front sway-bar, drop brackets are recommended SKU: 1019. Optional Rear Springs: To confirm rear spring size a measurement will have to be pulled from eyelet to eyelet. For a visual, please click here. 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.