BDS 4.5 Inch Lift Kit | 1999-2006 Chevy Silverado / GMC Sierra 1500 4WD | Rear Leaf Springs | NX2 Nitro Series Shocks

This variant includes Glide-Ride rear leaf springs in place of a lift block. The multi-leaf progressive design eliminates the need for a lift block, reduces axle wrap, and creates a more controlled and stable feel while maintaining factory payload weight ratings. Shocks are NX2 Nitro Series: nitrogen-charged twin-tube design with 10-stage velocity-sensitive valving, dual-welded ends, a 1-3/8-inch high-flow piston, self-lubricating seals, and a silver powder coat finish.

Overview

The BDS 4.5-inch lift kit is engineered to improve stance, performance, and capability for the 1999–2006 Chevy Silverado and GMC Sierra 1500 4WD. BDS designed a No Torsion Bar Drop System where the torsion bars are mounted directly to the top of the lower a-arm, eliminating the need to drop the torsion bar cross-member and maximizing ground clearance. This kit includes everything necessary to fit up to 33-inch tires while correcting suspension and steering geometry for improved on-road handling characteristics.

Up front, the kit utilizes torsion bar relocation brackets, high-arched 1/4-inch thick steel crossmembers, multipiece differential relocation brackets, and heavy duty skid plates for off-road protection. Steering geometry is corrected at the new taller ride height with CNC-machined ductile iron steering knuckles. Sway bar drops, bump stop extensions, brake line brackets, CV spacers, and all required hardware are also included. In the rear, buyers may choose between a replacement 5-inch lift block or full Glide-Ride leaf springs, along with new u-bolts and brake line brackets.

Features

• High Clearance design with No Torsion Bar Drop maximizes ground clearance
• CNC-machined ductile cast iron steering knuckles maintain ESC system compliance
• Heavy duty 1/4-inch thick laser cut steel high-clearance crossmembers
• HD skid plate system bolts together to form a rigid subframe for improved off-road protection
• Multipoint differential relocation brackets secure the front axle and improve CV angles
• Choice of 5-inch rear block kit or Glide-Ride leaf springs for rear lift
• Choice of NX2 Nitro Series or FOX 2.0 Performance Series gas shocks
• Factory Protection Plus drivetrain warranty included
• Clearance for up to 33-inch tires

Specifications

• Lift Height: 4.5 inches
• Front Lift Method: Torsion bar relocation — No Torsion Bar Drop System
• Crossmember Material: 1/4-inch thick laser cut steel
• Steering Knuckles: CNC-machined ductile cast iron
• Rear Lift Options: 5-inch cast iron block kit (replaces factory 2-inch block, nets 3 inches of rear lift) or Glide-Ride multi-leaf progressive leaf springs
• Shock Options: NX2 Nitro Series or FOX 2.0 Performance Series (see variant details)
• Tire Clearance: Up to 33 inches

Installation

• Estimated Time: 8–10 hours
• Difficulty: Difficult
• Tools Required: Cut Off Wheel or equivalent, Reciprocating Saw, Torsion Bar Unloading Tool, Welding Equipment

Important Notes

• Special tool (Kent Moore Tools Part# J-42393) required to unload/load torsion bars. Not available through BDS.
• Requires frame bracket modification and differential mount modification as well as minor welding.
• If equipped with stock 17-inch wheels, aftermarket 17-inch or larger wheels must be used.
• AWD models will require front driveline modification.
• Will not fit Quadsteer equipped models.