3.5-Inch Lift Kit with M1 Shocks for 2014–2019 Silverado/Sierra 1500
- M1 loaded struts and an M1 monotube shock pair, front and rear
- 3.5 inches of lift on 2014–2019 Chevy Silverado 1500 and GMC Sierra 1500 4WD
- Knuckles suit stamped steel and aluminum lower control arms
- Denali, Denali Ultimate, and eAssist trucks excluded; aftermarket control arms not supported
- Cutting and grinding required — downloadable installation guide available
The Trail Fortress check
Will it fit your truck?
✓ Fits
+ 1 more applications
✕ Does not fit
- Denali or Denali Ultimate models
- Models with eAssist (ECO Hybrid) package
Requires cutting and grinding. Does NOT work with aftermarket control arms. New lift block replaces the factory-equipped block. To ensure proper fit please confirm if the stock control arms are cast aluminum cast steel or stamped steel. For a visual please click here. To ensure adequate clearance when lowering the differential models equipped with a mass damper on the front differential must be removed. To retain factory wheels a 0.25" wheel spacer will be required SKU: 1065. Fitment on this page is based on the manufacturer’s application data.
About this kit
3.5-Inch Lift Kit with M1 Shocks, fitment-checked
M1 damping at both ends of a 3.5-inch knuckle lift for 2014–2019 Chevy Silverado 1500 and GMC Sierra 1500 4WD trucks: M1 loaded struts up front, an M1 monotube shock pair at the rear. Knuckles fit stamped steel and aluminum lower control arms. Denali, Denali Ultimate, and eAssist trucks fall outside the fitment, and installation requires cutting and grinding.
Specified with M1 monotube damping, this 3.5-inch lift kit serves 2014–2019 Chevy Silverado 1500 and GMC Sierra 1500 4WD trucks, the 2019 Silverado 1500 LD, and the Sierra 1500 Limited. M1 loaded struts set the front height against knuckles machined for stamped steel and aluminum lower control arms, while an M1 monotube pair handles the rear. Plan on cutting and grinding during the install, and pull the downloadable installation guide before you start. Denali and Denali Ultimate trims run Magnetic Ride Control and are excluded, as are eAssist trucks and any truck with aftermarket control arms.
What’s in the box
Kit contents
- 1× 3.5" Kit Box 12170BOX1
- 1× M1 Loaded Strut Pair 502130
- 1× M1 MONOTUBE SHOCK PAIR 770738P
- 1× 3.5in Stamped Steel & Aluminum Lca Knuckles 12130BOX1
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 12140 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 12140 |
| UPC / GTIN | 00840269910746 |
| Lift height | 3.5 in |
| Shock package | M1 series |
| Shipping weight | 135 lb |
| Country of origin | CN |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here