1.5 Inch Lift Kit | Fox 3.0 Bypass Factory Race Series | Chevy Trail Boss or GMC AT4 1500 (25-26) 4WD

Built for Trail Boss and AT4 owners who want race-bred suspension without sacrificing daily comfort. This 1.5-inch lift kit pairs FOX Factory Race Series 3.0 coil-over shocks with heavy-duty geometry correction up front and fabricated rear blocks to clear up to 35" tires (Chevy) or 33" tires (GMC) while preserving driveline angles and caster.

Installed and serviced at Road Runner Wheels & Tires. Most kits go in the same day. Call (678) 400-6467 to schedule.

What you get up front

• FOX Factory Race Series 3.0 Remote Reservoir Coil-Over Shocks — Position-sensitive damping with Dual Speed Compression (DSC) adjustment. Internal bypass technology creates multiple damping zones for confident ride quality through rough terrain, with finned external reservoirs to keep fluid temps in check.
• Heavy-Duty Tubular Upper Control Arms — 1.5" OD × .120-wall construction with indexed ball joint cups to correct geometry, boost down-travel, and allow camber adjustment. Greaseable ball joints for durability; maintenance-free rubber bushings at frame mounting points.

Out back

Fabricated steel lift blocks paired with longer u-bolts and a complementary set of FOX Factory Race Series 3.0 shocks deliver matched performance and progressive damping control through landing zones and hard compressions.

Important notes

• Chevy Trail Boss trucks support up to 35" tires; GMC AT4 trucks support up to 33" tires. Verify your model year and trim before ordering.
• Kit is engineered for 2025–2026 model years only. Do not install on earlier generations.
• FOX Factory Race Series shocks are pre-tuned at the factory; DSC adjusters allow field customization for load and driving style without dealer recalibration.

Why customers pick this at Road Runner

• Factory race-bred shocks installed and serviced by techs who dial in FOX adjusters every week.
• Geometry-corrected upper control arms preserve caster and driveline angle — no binding, no premature wear.
• Full BDS warranty backed locally; we handle adjustments and service long after the install.
• Professional install in our shop on most builds — get your truck lifted and rolling the way it should be.

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