6" RTS Lift Kit w/Dirt Logic 2.25 Shocks w/6" lift
Estimated Delivery in 3-7 business days
6" RTS Lift Kit w/Dirt Logic 2.25 Shocks w/6" lift
Estimated Delivery in 3-7 business days
| Part Number | Item | Quantity |
|---|---|---|
| K1159DL | 6" RTS Lift Kit w/Dirt Logic 2.25 Shocks | 1 |
Product Description
This high quality 6" lift kit for the GMC Sierra and Chevy Silverado 2500HD has been designed to improve the offroad capability of the vehicle while providing a smooth highway ride. The Fabtech lift kit retains the factory load carrying capacity of the vehicle that is perfect for owners that use their truck for towing and hauling.
The heart of this lift kit is Fabtech's cutting edge RTS® design. The RTS® is a bracket system that keeps the torsion bars in the factory location while providing lift. This feature provides superior ground clearance at the frame as there are no torsion bars hanging down to become high centered on or damaged when offroading. It provides a very clean appearance to the vehicle.
Another important aspect of this GM 2500HD lift kit is the lower control arm crossmembers. They are arched at the bottom to provide ground clearance and have a skid plate to protect the front differential against offroad obstacles. The crossmembers and bracketry are built with 1/4" thick steel that provides strength and rigidity to the vehicle's suspension.
The superior build quality and design of the components allows for a fast installation time with only four holes to drill and no cutting of the front diff housing.
This heavy duty GMC Sierra and Chevy Silverado 2500HD lift kit is built with the highest quality components and is designed to provide years of trouble free service while offering a great ride.
Fabtech RTS® Lift Kit
A proven bracket system that retains the torsion bars in the original position for protection while providing lift and a clean undercarriage appearance.
The Competition
Other lift kits leave the torsion bars exposed, which reduces clearance and adds risk of damage.
CROSSMEMBERS
1/4" thick steel lower control arm Crossmembers are arched for maximum ground clearance. The welded box design of these Crossmembers provides additional strength to the front suspension. Retains factory alignment cams for easy adjustment.
STEERING KNUCKLES
Fabtech's extended length ductile iron Steering Knuckles provide zero bump steer throughout the suspension travel. This provides an enhanced driver experience compared to stock. Near stock track width keeps the tires under the fenders for a clean appearance.
TIE RODS
Oversized tie rods are provided to replace the stock units that are designed to handle oversized tires.
SKID PLATE
A heavy duty front differential Skid Plate is constructed of 1/4" thick steel to protect the diff from offroad obstacles.
DIFFERENTIAL MOUNTS
Heavy duty Differential Mounts properly reposition the front diff for the precise CV and driveshaft angle to reduce driveline vibration at high speed.
SWAY BAR MOUNTS
Heavy duty mounts reposition the front sway bar for on road functionality and no bind for offroad use.
Front & REAR BUMP STOP SPACERS
Steel brackets relocate the 4 front and 2 rear compression stops to align with the factory closed cell bump stops to control the travel and eliminate over cycling of the suspension.
REAR LIFT BLOCKS
3" tall rear lift blocks replace the factory blocks for additional lift without changing the ride quality or load carrying capacity. This block height helps level the truck front to rear.
REAR U-BOLTS
U-Bolts designed to attach the entire rear differential to the vehicle. A critical part that demands the best quality for your vehicle.
Dirt Logic 2.25 Shocks
The stainless steel body with NitroSteel piston rod provides maximum corrosion resistance and durability. High quality componentry delivers a superior ride quality both on and offroad. Excellent damping for offroad use.
| Year | Make | Model | Drive | Position | Lift |
| 2024 | GMC | Sierra 2500 HD | 4WD | 6.0" | |
| 2023 | GMC | Sierra 2500 HD | 4WD | 6.0" | |
| 2022 | GMC | Sierra 2500 HD | 4WD | 6.0" | |
| 2021 | GMC | Sierra 2500 HD | 4WD | 6.0" | |
| 2020 | GMC | Sierra 2500 HD | 4WD | 6.0" |
FABTECH LIMITED LIFETIME WARRANTY
Fabtech Motorsports provides a Limited Lifetime Warranty to the original retail purchaser who owns the vehicle, on which the product was originally installed, for defects in workmanship and materials.
The Limited Lifetime Warranty excludes the following Fabtech items; bushings, bump stops, ball joints, tie rod ends, limiting straps, cross shafts, heim joints and driveshafts. These parts are subject to wear and are not considered defective when worn. They are warranted for 60 days from the date of purchase for defects in workmanship.
Dirt Logic and Performance Coilover take apart shocks are considered a serviceable shock with a one year warranty on leakage only. Service seal kits are available separately for future maintenance. All other shocks are covered under our Limited Lifetime Warranty.
Fabtech does not warrant any product for finish, alterations, modifications and/or installation contrary to Fabtech’s instructions. Alterations to the finish of the parts including but not limited to painting, powder coating, plating and/or welding will void all warranties. Some finish damage may occur to parts during shipping, which is considered normal and is not covered under warranty.
Shipping Info
Free Shipping on most orders to the lower 48 U.S. states. Truck freight items (over 100 lbs) and custom orders require a separate shipping quote.
- Applies to items like axles, leaf springs, and long-travel kits.
- No international shipping on freight items — only to U.S.-based freight forwarders.
- Worldwide shipping available: Canada, Europe, UAE, Australia, and most of Asia.
Contact us for an international shipping quote.
Returns & Exchanges
30-Day Return Policy — Items must be new, unused, uninstalled, and include all original hardware.
- No restocking fees for exchanges or gift card credit.
- 10% restocking fee on refunds, returns cost us real money, so the 10% helps keep the lights on.
- Installed, damaged, or dirty parts cannot be returned.
- Any returns missing hardware or miscellaneous items, the return will be denied and returned to the buyer at the buyer's expense.
Return Shipping Responsibility
CHECKOUT+ Package and Order Protection plan provides prepaid return labels for any returned packages, this fee varies by product.
- Our mistake (misboxed, wrong item, damaged): We cover the cost of return shipping.
- Buyer mistake (wrong item ordered, fitment error, changed mind): Return shipping is the buyer's responsibility - unless CHECKOUT+ Package Protection has been purchased.
- Under 50 lbs: Discounted carrier rate
- Over 50 lbs: Discounted carrier rate + $25 oversize fee
Refunds
Refunds are issued within 5–7 business days of receiving your return.
- Funds typically post to your account in 1–3 business days depending on your payment method.
- There is a 10% restocking fee on all refunds. We don’t get our original shipping, labor, or transaction fees back — so the 10% restocking fee keeps the lights on.
- You will receive an email once your refund is processed.
International Orders
- All international orders are final sale.
- Returns via freight forwarders only accepted if the product hasn’t left the U.S.
- Import taxes, duties, and other possible import-related fees are the buyer’s responsibility and not included in our shipping charges.
- We are not responsible for goods once exported outside the U.S.
Product Details
Whether you want to upgrade, add a reservoir, or find something more affordable, contact us with any questions!
View full product specifications
| Part Number | Item | Quantity |
|---|---|---|
| K1159DL | 6" RTS Lift Kit w/Dirt Logic 2.25 Shocks | 1 |
Product Description
This high quality 6" lift kit for the GMC Sierra and Chevy Silverado 2500HD has been designed to improve the offroad capability of the vehicle while providing a smooth highway ride. The Fabtech lift kit retains the factory load carrying capacity of the vehicle that is perfect for owners that use their truck for towing and hauling.
The heart of this lift kit is Fabtech's cutting edge RTS® design. The RTS® is a bracket system that keeps the torsion bars in the factory location while providing lift. This feature provides superior ground clearance at the frame as there are no torsion bars hanging down to become high centered on or damaged when offroading. It provides a very clean appearance to the vehicle.
Another important aspect of this GM 2500HD lift kit is the lower control arm crossmembers. They are arched at the bottom to provide ground clearance and have a skid plate to protect the front differential against offroad obstacles. The crossmembers and bracketry are built with 1/4" thick steel that provides strength and rigidity to the vehicle's suspension.
The superior build quality and design of the components allows for a fast installation time with only four holes to drill and no cutting of the front diff housing.
This heavy duty GMC Sierra and Chevy Silverado 2500HD lift kit is built with the highest quality components and is designed to provide years of trouble free service while offering a great ride.
Fabtech RTS® Lift Kit
A proven bracket system that retains the torsion bars in the original position for protection while providing lift and a clean undercarriage appearance.
The Competition
Other lift kits leave the torsion bars exposed, which reduces clearance and adds risk of damage.
CROSSMEMBERS
1/4" thick steel lower control arm Crossmembers are arched for maximum ground clearance. The welded box design of these Crossmembers provides additional strength to the front suspension. Retains factory alignment cams for easy adjustment.
STEERING KNUCKLES
Fabtech's extended length ductile iron Steering Knuckles provide zero bump steer throughout the suspension travel. This provides an enhanced driver experience compared to stock. Near stock track width keeps the tires under the fenders for a clean appearance.
TIE RODS
Oversized tie rods are provided to replace the stock units that are designed to handle oversized tires.
SKID PLATE
A heavy duty front differential Skid Plate is constructed of 1/4" thick steel to protect the diff from offroad obstacles.
DIFFERENTIAL MOUNTS
Heavy duty Differential Mounts properly reposition the front diff for the precise CV and driveshaft angle to reduce driveline vibration at high speed.
SWAY BAR MOUNTS
Heavy duty mounts reposition the front sway bar for on road functionality and no bind for offroad use.
Front & REAR BUMP STOP SPACERS
Steel brackets relocate the 4 front and 2 rear compression stops to align with the factory closed cell bump stops to control the travel and eliminate over cycling of the suspension.
REAR LIFT BLOCKS
3" tall rear lift blocks replace the factory blocks for additional lift without changing the ride quality or load carrying capacity. This block height helps level the truck front to rear.
REAR U-BOLTS
U-Bolts designed to attach the entire rear differential to the vehicle. A critical part that demands the best quality for your vehicle.
Dirt Logic 2.25 Shocks
The stainless steel body with NitroSteel piston rod provides maximum corrosion resistance and durability. High quality componentry delivers a superior ride quality both on and offroad. Excellent damping for offroad use.
| Year | Make | Model | Drive | Position | Lift |
| 2024 | GMC | Sierra 2500 HD | 4WD | 6.0" | |
| 2023 | GMC | Sierra 2500 HD | 4WD | 6.0" | |
| 2022 | GMC | Sierra 2500 HD | 4WD | 6.0" | |
| 2021 | GMC | Sierra 2500 HD | 4WD | 6.0" | |
| 2020 | GMC | Sierra 2500 HD | 4WD | 6.0" |
View warranty coverage
Free shipping within the lower 48 United States
