Fits: 2020 thru 2024 Chevy Silverado/GMC Sierra 2500HD/3500HD L5P Duramax Diesel
*Please call for availability*
BDS is a game changer in the performance of your 2020+ Chevy Silverado and GMC Sierra 2500 / 3500 HD truck with a 3-inch suspension lift kit with FOX 2.5 Performance Elite Coil-Over conversion. Designed to improve stance, performance, and capability, this kit includes everything necessary to set your truck up right with clearance for up to 35" tires. These kits feature proprietary FOX 2.5 Performance Elite coil-over shocks designed specifically to bolt-on performance for increased travel and the ability to soak up the roughest terrain along with smooth on-road comfort. In addition to replacing the factory torsion bars, the upper and lower control arms are upgraded to improve strength, travel, and accommodate the new coil-overs. The new upper control arms are fabricated from large 1.5" OD x .120-wall tubing, fully TIG welded for the highest quality, strength and durability. To compliment the uppers, the new lower control arms are built from high strength steel, fully boxed with internally gusseted. This kit takes principles on BDS's engineering standard for improved ground clearance, strength, and offroad protection while correcting suspension and steering geometry for great on-road handling characteristics. Up front, the kit utilizes FOX 2.5 coil-over shocks, heavy duty tubular upper control arms, fully boxed and gusseted lower control arms, and multipiece differential relocation brackets to maintain correct CV angles. These combined with the provided sway bar links, supplied hardware and more provide a comprehensive front suspension lift ready for whatever you throw at it. In the rear BDS offers replacement lift blocks to lift and level that stance. The lift block installs in place of the stock block and retains ride quality and load capacity. Also for the rear is a u-bolt flip kit for max clearance and precision tuned FOX 2.0 Performance Series or Performance Elite Series 2.5” shocks for ultimate off road performance.
Features:
- HD Control Arms
- Converts torsion bar front suspension to a Coil-over for improved ride comfort.
- Includes BDS upper and lower control arms.
- FOX 2.5 Performance Elite series DSC coil-overs offer improved damper performance over stock.
- BDS performance UCAs increase strength and allow for more suspension travel
- Factory Protection Plus drivetrain warranty included Easy,
- 100% Bolt on installation
Recommended Tires & Wheels
- 35 x 12.50 on 17” x 9” w/ 4-1/2 to 5-1/2” Backspacing**
- 285/75 on 17x9” w/ 4-1/2 to 5-1/2” Backspacing*
- 35 x 12.50 on 18” x 9” w/ 4-1/2 to 5-1/2” Backspacing**
- 285/70 on 18x9” w/ 4-1/2 to 5-1/2” Backspacing*
- 35 x 12.50 on 20” x 9” w/ 4-1/2 to 5-1/2” Backspacing**
- 295/60 on 20” x 9” w/ 4-1/2 to 5-1/2” Backspacing*
- Larger than 20”, use 20” wheel specs
- Trimming may be required.
- Stock 17”, 18”, and 20” wheels will not fit back on the vehicle once this suspension system is installed.
Important Notes:
- Models with two-piece rear drive shafts will require a carrier bearing drop kit. (BDS121612)
- Requires frame bracket modification and minor welding
- Disassembly/assembly of the factory torsion bar system requires the use of a special unloading tool.
- The GM specified tool # is CH48809.
- Compatible with diesel models ONLY. Works with standard or AT4 diesel models. The use of the coilovers on GAS engine models is not recommended due to providing too much lift. Available preload adjustment is typically not enough to achieve desired ride height.
- Some minor trim will be required with certain wheel/tire combination. This is normal with most aftermarket tire/wheel fitment on Chevy/GM trucks. Trimming will normally include the bottom edge of the inner fender shrouds and/or lower corner of front bumper valance. As a rule of thumb, deeper backspacing and shorter/narrower tires will reduce/eliminate trimming required. Further trimming tips are included at the end of this instruction sheet.
- Dually Models will require aftermarket 20" wheels with a max tire size of 285/60/20.
- Factory 17”, 18” and 20” wheels cannot be reinstalled due to upper control arm clearance.
- Coilover coil has a large amount of preload, a coil spring compressor must be used to remove the coil from the coilover. Failure to use a coil spring compressor may result in death or injury.
- Do NOT increase coilover preload.
- For replacement ball joints use service kit BDS081203. Ball joints are directional and must be installed with the ‘dot’ facing either inward or outward on the vehicle, otherwise damage may occur.
- Increase of 1” of track width per side (2” overall) is done to create a better travel range of the suspension to allow more droop travel from ride height along width helping the coilover clear the frame components.
