6-Inch Lift Kit with Vertex Shocks for 2025–2026 GMC Sierra 1500
- Fits 2025–2026 GMC Sierra 1500 4WD and RWD in Elevation, Pro, SLE, and SLT trims
- Does not fit Denali, Denali Ultimate, AT4, or AT4X models
- Factory wheels will not work — 20-inch or larger aftermarket wheels with 4.5in backspacing required
- Includes adjustable Vertex 2.5 front struts, 2x Vertex 2.5 rear shocks, cast knuckles, and a front full skid
- Cutting and drilling required — downloadable installation guide available
The Trail Fortress check
Will it fit your truck?
✓ Fits
✕ Does not fit
- Denali or Denali Ultimate models with
- AT4 models
- AT4X 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 with Vertex Shocks, fitment-checked
Rough Country 26650_A is a 6-inch lift kit for the 2025–2026 GMC Sierra 1500 in 4WD and RWD, covering Elevation, Pro, SLE, and SLT trims. Adjustable Vertex 2.5 front struts and Vertex 2.5 rear shocks are part of the kit. Cutting and drilling are required, and factory wheels will not clear — plan on 20-inch or larger aftermarket wheels with 4.5in backspacing.
This 6-inch lift kit for the 2025–2026 GMC Sierra 1500 4WD and RWD ships as a multi-box kit: a high-clearance crossmember box, a front full skid, driver- and passenger-side cast knuckle boxes, a mono-leaf rear package, adjustable Vertex 2.5 front struts, and a pair of Vertex 2.5 rear shocks. Track width stays at the factory setting. Installation calls for cutting and drilling. It does not fit Denali, Denali Ultimate, AT4, or AT4X trims. Test-fit wheels first; some aftermarket wheels need the 0.25" spacer #1065. A downloadable installation guide is available. Shipping weight: 317 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× Vertex 2.5 Adj FR Lh 6in 685085L
- 1× Vertex 2.5 Adj FR Rh 6in 685085R
- 2× Vertex 2.5 RR 7 In 695739
- 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 26650_A kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 26650_A |
| UPC / GTIN | 00840269970719 |
| Lift height | 6 in |
| Shock package | Vertex series |
| Shipping weight | 317 lb |
| Country of origin | TH |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here