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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 | Mono Leaf Rear | Diesel | Chevy Silverado 1500 4wd (25-26)

Part #: 21630D_AUPC: 840269970788Brand: Rough Country

$1,399.95

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 Chevy Silverado 1500 diesel owners who want commanding height without sacrificing suspension geometry, this 6-inch lift kit raises and levels your truck while maintaining factory-like angles across all suspension components. Rough Country's engineering preserves ride quality through precision-cut steel knuckles, differential brackets, and drop cross members that reduce CV angles — letting you run 35" to 37" tires confidently and keep your truck feeling planted on and off-road.

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

  • Universal Mono Leaf Rear Kit Box — rear blocks, shocks, and u-bolts engineered to retain factory-like geometry and deliver 6 inches of lift.
  • 6-inch Front Suspension Kit Box — upper strut spacers offering uncompromised strength and rigidity to gain lift height without compromise.
  • Driver and Passenger Knuckle Boxes — heavy-duty cast knuckles built to withstand rugged terrain while reducing CV angles.
  • Diesel-Specific Front Kit Box — differential brackets and engineered components tailored to diesel truck weight and driveline geometry.
  • Drop Cross Member Box — precision-machined crossmember that maintains ideal suspension geometry for superior handling and clearance.

Important notes

  • Requires cutting and drilling for installation.
  • Does NOT fit LT Trail Boss, Custom Trail Boss, or ZR2 models — these come equipped with factory 2-inch lifts and/or Multimatic DSSV dampers incompatible with this kit.
  • Does NOT fit factory Chevy wheels — 20-inch or larger aftermarket wheels required.
  • Wheels must feature 4.5-inch backspacing for proper fitment. Some aftermarket wheels may require a 0.25-inch wheel spacer (#1065).
  • Test fit wheels prior to installation to confirm clearance and backspacing compatibility.

Why customers pick this at Road Runner

  • Geometry preserved — Rough Country's drop cross member and knuckle design keep suspension angles close to factory specs, so your truck rides smooth even at 6 inches higher.
  • Backed by Rough Country's limited lifetime warranty against manufacturer defects — honored and serviced locally by our team.
  • Professionally installed by technicians who perform lifts every week — precision alignment performed in-house as part of every installation.
  • Diesel-specific engineering — components designed for the weight and driveline demands of your truck.
  • Tire clearance for 35"–37" rubber without modification — run the size you want without compromise.

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

QtyPartPart #
1Universal Kit Box | Mono Leaf Rear | Chevy Silverado 1500 (19-23) GMC Sierra 1500 (19-23)21630991
16in Kit Crossmember Box | Chevy Silverado 1500 (19-23) Chevy Suburban 1500 (2021)217BOX11
1Diesel 6in FR Kit Box | Chevy Silverado 1500 (19-23) GMC Sierra 1500 (19-23)217BOX10
16in FR Kit Box | Chevy Silverado 1500 (19-23) Chevy Suburban 1500 (2021)21700991
16in Kit Dr Knuckle Box | Chevy Silverado 1500 (19-23) Chevy Suburban 1500 (2021)21730BOX5
16in Kit Ps Knuckle Box | Chevy Silverado 1500 (19-23) Chevy Suburban 1500 (2021)21730BOX6

Features

  • Enhanced Stance: Lifts and levels your vehicle from front to rear for a commanding presence.
  • Optimized Suspension: High-clearance crossmember design maintains ideal suspension geometry for superior handling.
  • Extreme Durability: Includes heavy-duty cast knuckles built to withstand rugged terrain.
  • Factory Fitment: Retains stock track width for proper wheel alignment and stability.
  • Precision Engineering: 100% laser-cut materials using advanced CAD technology for a perfect fit.
  • Built to Last: Heavy-duty fabricated blocks offer superior strength and longevity over cast alternatives.
YearsMakeModelDrive
2025-2026ChevroletSilverado 1500 Custom4WD
2025-2026ChevroletSilverado 1500 High Country4WD
2025-2026ChevroletSilverado 1500 LT4WD
2025-2026ChevroletSilverado 1500 LTZ4WD
2025-2026ChevroletSilverado 1500 RST4WD
2025-2026ChevroletSilverado 1500 WT4WD
  • Tire size: 35″ to 37″ tall
  • Lift height: 6″
Requires cutting and drilling. Does NOT fit LT Trail Boss or Custom Trail Boss models as they are equipped with a 2-inch factory lift. Does NOT fit ZR2 models as it is equipped with a 2-inch factory lift and Multimatic DSSV dampers. Tire & Wheel Details Does NOT fit factory wheels. 20-inch or larger aftermarket wheels are required. Wheels must feature 4.5in backspacing to fit. Please test fit wheels prior to installation. Some aftermarket wheels may require 0.25" wheel spacer #1065.

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.