Rough Country · Authorized Dealer
6 Inch Lift Kit | Diesel | Gmc Sierra 1500 2wd/4wd (2025-2026)
$1,399.95
Price does not include installation.
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$1,399.95
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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 GMC Sierra 1500 diesel owners who want commanding height without sacrificing ride quality, this 6-inch lift kit raises and levels your truck from front to rear while preserving factory-like suspension geometry. The kit combines steel knuckles, differential brackets, and a drop crossmember to keep CV angles true, delivering superior handling alongside 35"–37" tire clearance.
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 Kit Box — core hardware set for 2025 Sierra 1500 compatibility.
- 6-inch Driver & Passenger Knuckle Boxes — high-clearance cast knuckles that maintain ideal suspension angles and reduce CV wear.
- Diesel 6-inch Front Kit Box — diesel-specific front end componentry engineered for weight distribution and ride quality.
- 6-inch Crossmember Box — drop crossmember design lowers the differential mounting point to simulate factory geometry.
- 6-inch Rear Kit Box — rear blocks, u-bolts, and mounting hardware for factory-like rear geometry.
- N3 Shock Pair — nitrogen-charged shocks tuned for lifted truck performance and comfort.
Important notes
- Requires cutting and drilling during installation.
- Does NOT fit Denali or Denali Ultimate models — they are equipped with Adaptive Ride Control and are incompatible with this kit.
- Does NOT fit AT4 models — equipped with factory 2-inch lift.
- Does NOT fit AT4X models — equipped with factory 2-inch lift and Multimatic DSSV dampers.
- Does NOT fit factory wheels. 20-inch or larger aftermarket wheels are required.
- Wheels must feature 4.5" backspacing. Some aftermarket wheels may require a 0.25" wheel spacer (#1065). Test fit wheels prior to installation.
Why customers pick this at Road Runner
- Geometry-corrected front and rear — steel knuckles and drop crossmember keep CV angles true, preserving ride quality and extending driveline life.
- Rough Country lifetime warranty backed locally — we stand behind every lift we install with industry-leading coverage for structural and workmanship defects.
- Expert installation by suspension technicians — our team installs these kits every week and gets yours right the first time.
- Professional alignment included — alignment performed in-house as part of every lift install to ensure tire wear and handling are dialed in.
- Shock options — N3 nitrogen-charged shocks ship with this kit; ask about Vertex reservoir upgrades if you want more reservoir capacity.
Ready to build it? Call (678) 400-6467. Hablamos Español.
| Qty | Part | Part # |
|---|---|---|
| 1 | Universal Kit Box | Chevy Silverado 1500 (2025) GMC Sierra 1500 (2025) | 110030991 |
| 1 | 6in Kit Crossmember Box | Chevy Silverado 1500 (19-23) Chevy Suburban 1500 (2021) | 217BOX11 |
| 1 | Diesel 6in FR Kit Box | Chevy Silverado 1500 (19-23) GMC Sierra 1500 (19-23) | 217BOX10 |
| 1 | 6in FR Kit Box | GMC Sierra 1500 (19-23) | 217BOX8 |
| 1 | N3 Shock Pair | 23158 |
| 1 | 6in Kit Dr Knuckle Box | Chevy Silverado 1500 (19-23) Chevy Suburban 1500 (2021) | 21730BOX5 |
| 1 | 6in 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.
| Years | Make | Model | Drive |
|---|---|---|---|
| 2025-2026 | GMC | Sierra 1500 Elevation | 4WD |
| 2025-2026 | GMC | Sierra 1500 SLE | 4WD |
| 2025-2026 | GMC | Sierra 1500 SLT | 4WD |
| 2026 | GMC | Sierra 1500 Pro | 4WD |
- Tire size: 35″ to 37″ tall
- Lift height: 6″
Requires cutting and drilling. Does NOT fit Denali or Denali Ultimate models with as they are equipped with Adaptive Ride Control. Does NOT fit AT4 models as it is equipped with a 2-inch factory lift. Does NOT fit AT4X 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.
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