3.5-Inch Lift Kit with M1 Struts for 2025-2026 GMC Sierra 1500
- Fits 2025-2026 GMC Sierra 1500 4WD and RWD in Elevation, Pro, SLE, and SLT trim
- Lifts the front 3.5 inches and the rear 2.5 inches for a leveled stance
- Kit contents: M1 loaded strut pair, M1 monotube shock pair, and forged upper control arms with pre-installed POM ball joints
- Does not fit Denali, Denali Ultimate, AT4, AT4X, or diesel models
- 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 M1 Struts, fitment-checked
Rough Country 28840_A is a 3.5-inch lift kit for compatible 2025-2026 GMC Sierra 1500 models in 4WD and RWD. Front ride height goes up 3.5 inches with 2.5 inches at the rear for a level stance. The kit pairs M1 loaded struts and an M1 monotube shock pair with forged aluminum upper control arms carrying pre-installed POM ball joints. Cutting and drilling are part of the job.
This 3.5-inch lift kit for the 2025-2026 GMC Sierra 1500 covers the Elevation, Pro, SLE, and SLT submodels in both 4WD and RWD form. It raises the front 3.5 inches and the rear 2.5 inches, so the truck sits level rather than nose-down, and the added height opens up clearance for off-road use. Denali, Denali Ultimate, AT4, AT4X, and diesel trucks are outside the fitment. Plan for cutting and drilling in the driveway, and pull the downloadable Rough Country installation guide before you start.
What’s in the box
Kit contents
- 1× 288 Strut Kit Box 28831991
- 1× Forged Upper Control Arms 29501
- 1× M1 Loaded Strut Pair 502066
- 1× M1 MONOTUBE SHOCK PAIR 770739P
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 28840_A kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 28840_A |
| UPC / GTIN | 00840269974205 |
| Lift height | 3.5 in |
| Shock package | M1 series |
| Shipping weight | 46 lb |
| Country of origin | CN |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here