4 Inch Lift Kit | At4/trailboss | Chevy/gmc 1500 (25-26)

Built for AT4 and Trailboss owners who want a commanding presence and serious off-road capability, this 4-inch lift kit transforms your 2025–2026 Silverado 1500 or Sierra 1500 by stacking on top of the factory 2-inch kit. Rough Country's design preserves suspension geometry using steel knuckles, differential brackets, and drop crossmembers to keep CV angles true, while cast knuckles and laser-cut fabricated blocks deliver extreme durability. You'll run up to 35-inch tires without modification — no strut disassembly required.

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 components for your 2025–2026 model.
• Knuckle Boxes (Driver & Passenger) — Cast knuckles engineered for extreme durability and precise suspension geometry.
• Front Kit Box — Upper strut spacers and brackets that deliver uncompromised strength without strut disassembly.
• Crossmember Box — High-clearance, drop-design crossmember that optimizes suspension angles and clearance.
• Front Full Skid — Protective skid plate for undercarriage coverage.
• Rear Blocks, Shocks & U-Bolts — Retain factory-like geometry in the rear while maintaining lift height.

Important notes

• Model-specific fit: ONLY fits LT Trailboss, Custom Trailboss, and AT4 models equipped with a factory 2-inch lift.
• Wheel requirements: Does NOT fit factory wheels. 20-inch or larger aftermarket wheels are required, with 4.5-inch backspacing. Some aftermarket wheels may require a 0.25-inch wheel spacer.
• Installation demands: Requires cutting, drilling, and a strut compressor. Professional installation at Road Runner ensures correct geometry and alignment.
• Tire clearance: Supports 33–35-inch tires without additional modifications when properly set up.

Why customers pick this at Road Runner

• Geometry-corrected design — cast knuckles and drop crossmembers preserve factory-like suspension angles for a smoother ride after lift.
• Rough Country lifetime warranty backed locally — we stand behind every kit we install with manufacturer support and in-house service.
• Professional installation by technicians who perform these lifts weekly — precision counts when geometry is on the line.
• Alignment performed in-house as part of every lift install — your truck leaves dialed in and safe.
• Same-day installation available — get lifted and rolling fast.

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