6-Inch Lift Kit for 2025-2026 Chevy Silverado 1500 4WD — Part 21630_A
- Fits compatible 2025-2026 Chevy Silverado 1500 4WD trims: WT, LT, RST, LTZ, High Country, PPV
- Not for LT Trail Boss, Custom Trail Boss, or ZR2 trucks with the 2-inch factory lift and DSSV dampers
- Factory wheels do not clear — requires 20-inch or larger aftermarket wheels with 4.5in backspacing
- Some aftermarket wheels call for the 0.25" wheel spacer #1065; test fit before installing
- Cutting and drilling required — downloadable installation guide available
- Six-box kit with front skid, crossmember, cast knuckles, and mono-leaf rear hardware. Shipping weight: 231.3 lb
The Trail Fortress check
Will it fit your truck?
✓ Fits
✕ Does not fit
- LT Trail Boss or Custom Trail Boss models
- ZR2 models
- Factory wheels
Requires cutting and drilling. 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
6-Inch Lift Kit, fitment-checked
Rough Country 21630_A is a 6-inch lift kit for compatible 2025-2026 Chevy Silverado 1500 4WD trucks, including WT, LT, RST, LTZ, High Country, and PPV. Factory wheels will not clear it: plan on aftermarket wheels 20 inches or larger with 4.5in backspacing, and test fit before the build. Trail Boss and ZR2 trucks with the 2-inch factory lift are not covered.
This 6-inch lift kit for the 2025-2026 Chevy Silverado 1500 4WD ships as a multi-box kit: a front kit box, a high-clearance crossmember box, a front full skid, driver and passenger cast knuckle boxes, and a universal box with the mono-leaf rear hardware. Stock track width is retained, and fabricated rear blocks replace cast pieces. Installation calls for cutting and drilling, so read through the downloadable Rough Country installation guide first. Confirm your wheel plan too, since some aftermarket wheels need the 0.25" spacer #1065. Shipping weight: 231.3 lb.
What’s in the box
Kit contents
- 1× Universal Kit Box 21630991
- 1× 6in Kit Crossmember Box 217BOX11
- 1× FR Full Skid 217BOX3
- 1× 6in FR Kit Box 21700991
- 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 21630_A kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 21630_A |
| UPC / GTIN | 00840269970733 |
| Lift height | 6 in |
| Shipping weight | 231.3 lb |
| Country of origin | US |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here