3.5-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
- Lifts the front 3.5 inches and the rear 2.5 inches to level out factory rake
- Kit contents: forged upper control arms, adjustable Vertex 2.5 front struts (LH and RH), and a V2 monotube rear shock pair
- Not for Denali, Denali Ultimate, AT4, AT4X, or diesel models — check your trim before ordering
- 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
- Diesel models
Requires cutting and drilling. Fitment on this page is based on the manufacturer’s application data.
About this kit
3.5-Inch Lift Kit with Vertex Shocks, fitment-checked
Rough Country 28857_A raises the front of a 2025–2026 GMC Sierra 1500 by 3.5 inches and the rear by 2.5 inches for a level stance. The kit pairs forged aluminum upper control arms with pre-installed POM ball joints, adjustable Vertex 2.5 front struts, and a V2 monotube rear shock pair. Denali, Denali Ultimate, AT4, AT4X, and diesel trucks are not covered.
This 3.5-inch lift kit for the 2025–2026 GMC Sierra 1500 covers Elevation, Pro, SLE, and SLT trims in both 4WD and RWD, per the fitment table. Left- and right-hand adjustable Vertex 2.5 front struts set the front height, a V2 monotube pair handles the rear, and forged aluminum upper control arms restore front geometry with wider-travel POM ball joints already pressed in. Installation calls for cutting and drilling, so budget driveway time accordingly. Confirm your trim first: Denali, Denali Ultimate, AT4, AT4X, and diesel-powered trucks fall outside this application. A downloadable installation guide is available.
What’s in the box
Kit contents
- 1× Forged Upper Control Arms 29501
- 1× 288 Strut Kit Box 28831991
- 1× Vertex 2.5 Adj FR Lh 3.5in 685066L
- 1× Vertex 2.5 Adj FR Rh 3.5in 685066R
- 1× V2 MONOTUBE SHOCK PAIR 760782-2
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 28857_A kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 28857_A |
| UPC / GTIN | 00840269974229 |
| Lift height | 3.5 in |
| Shock package | Vertex series |
| Shipping weight | 46 lb |
| Country of origin | TH |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here