7-Inch M1 Monotube Lift Kit for 2020-2026 Chevy/GMC 2500 HD
- Fits 2020-2026 Silverado 2500 HD/3500 HD and Sierra 2500 HD/3500 HD, 4WD and RWD
- Built around M1 Monotube shock pairs front and rear
- Laser-cut crossmember and cast knuckles; no drilling or modification of the differential
- Excludes dually, rear overload spring, AT4X, and ZR2 trucks; factory wheels will not work
The Trail Fortress check
Will it fit your truck?
✓ Fits
✕ Does not fit
- Dually models
- Equipped with rear overload springs
- AT4X models
- ZR2 models
Does NOT work with factory wheels. Gas models may require modification to the exhaust for driveshaft clearance. Fitment on this page is based on the manufacturer’s application data.
About this kit
7-Inch M1 Monotube Lift Kit, fitment-checked
Rough Country 10140 is the M1 Monotube build of the 7 inch non-torsion-drop kit for 2020-2026 Silverado 2500 HD/3500 HD and Sierra 2500 HD/3500 HD. Two M1 Monotube shock pairs handle damping front and rear. Dually trucks, trucks with rear overload springs, AT4X, and ZR2 models are excluded, and factory wheels will not clear the kit.
Shock choice is what separates this part number from its siblings: M1 Monotube pairs front and rear, matched to the 7 inch ride height. Underneath, the hardware is the same layout — a precision laser-cut crossmember, cast driver and passenger knuckles, bracket and rear kit boxes, and no differential drilling. Track width and axle angles stay where the factory put them. Check the exclusions before you order: no dually, no rear overload springs, no AT4X or ZR2, no factory wheels, and gas trucks may need exhaust work. Shipping weight: 306.0 lb.
What’s in the box
Kit contents
- 1× Crossmember Box 10130BOX3
- 1× 7" NTD Bracket Box 10130998
- 1× Kit Box 10230BOX1
- 1× 253x Kit Box 1253BOX6
- 1× M1 MONOTUBE SHOCK PAIR 770744P
- 1× M1 MONOTUBE SHOCK PAIR 770776P
- 1× 7" NTD Rear Kit Box 10130999
- 1× Dr Knuckle 10130BOX1
- 1× Pass Knuckle 10130BOX2
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 10140 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 10140 |
| UPC / GTIN | 00840269916977 |
| Lift height | 7 in |
| Shock package | M1 series |
| Shipping weight | 306 lb |
| Country of origin | US |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here