4 Inch Lift Kit for Silverado Trail Boss & Sierra AT4 (2025)
- Built only for 2025 Silverado LT/Custom Trail Boss and Sierra AT4 (2-inch factory lift models)
- Nothing factory fits for wheels: 20-inch-plus aftermarket with 4.5-inch backspacing
- Cutting and drilling are part of the job — guide included
- 281 lb, freight delivery
The Trail Fortress check
Will it fit your truck?
✓ Fits
✕ Does not fit
- Factory wheels
Requires cutting and drilling. ONLY fits LT Trail Boss Custom Trail Boss and AT4 models as they are equipped with a 2-inch factory lift. 20-inch or larger aftermarket wheels are required. Wheels must feature 4.5in backspacing to fit. Please test fit wheels prior to installation. Some aftermarket wheels may require 0.25" wheel spacer #1065. Fitment on this page is based on the manufacturer’s application data.
About this kit
4 Inch Lift Kit, fitment-checked
A 4 inch lift kit made specifically for the factory-lifted trucks: 2025 Chevrolet Silverado LT Trail Boss and Custom Trail Boss and GMC Sierra AT4 (Rough Country 110331). On top of their 2-inch factory lift, wheel requirements apply.
Where most kits exclude the factory-lifted trims, this one is built for them: the 2025 Silverado 1500 LT Trail Boss and Custom Trail Boss and the 2025 GMC Sierra AT4, which come with a 2-inch factory lift. The wheel rules carry over from the taller kits — nothing factory fits, you need 20-inch-plus aftermarket wheels with 4.5-inch backspacing, and a 0.25-inch spacer covers wheels that sit tight. Cutting and drilling are part of the job; the step-by-step guide is included. 281 lb, freight delivery.
What’s in the box
Kit contents
- 1× Universal Kit Box 110030991
- 1× 6in Kit Crossmember Box 217BOX11
- 1× FR Full Skid 217BOX3
- 1× N3 Shock Pair 23158
- 1× Loaded Strut Pair 501067
- 1× 6in Kit Dr Knuckle Box 21730BOX5
- 1× 6in Kit Ps Knuckle Box 21730BOX6
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 110331 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 110331 |
| UPC / GTIN | 00840269966637 |
| Lift height | 4 in |
| Shipping weight | 281 lb |
| Country of origin | US |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here