3.5-Inch Knuckle Lift Kit with M1 Shocks for Silverado/Sierra HD
- Fits 2011-2019 Chevrolet Silverado and GMC Sierra 2500 HD/3500 HD in 4WD and RWD — review the full fitment list
- Does not fit dually models or trucks with Magnetic Ride Control; confirm rear overload spring configuration first
- Kit contents: red forged upper control arms, driver and passenger knuckles, two M1 monotube shock pairs, forged torsion bar keys
- Bolt-on installation with no cutting, drilling, or welding — a torsion bar removal tool (1067) makes the job easier
- Downloadable installation guide available
- 3 Year Limited Warranty; shipping weight: 137 lb
The Trail Fortress check
Will it fit your truck?
✓ Fits
+ 1 more applications
✕ Does not fit
- Models with rear overload springs
- Models with Magnetic Ride Control
- Dually models
About this kit
3.5-Inch Knuckle Lift Kit with M1 Shocks, fitment-checked
Rough Country 97640RED is a 3.5-inch knuckle lift kit for 2011-2019 Chevrolet Silverado and GMC Sierra 2500 HD and 3500 HD trucks. The kit pairs red powdercoated forged upper control arms and machined driver and passenger knuckles with two M1 monotube shock pairs. It does not fit dually models or trucks equipped with Magnetic Ride Control.
This 3.5-inch knuckle lift kit for the 2011-2019 Silverado and Sierra 2500 HD and 3500 HD covers 4WD and RWD applications across WT, LT, LTZ, SLE, SLT, High Country, Denali, and Base trims listed in the fitment section. The knuckles are machined to improve driveline angles, the forged torsion bar keys are indexed to limit strain on factory parts, and the red forged upper control arms ride on OEM-style Clevite bushings. No cutting, drilling, or welding is called for. Check your rear spring configuration against the fitment notes, and use the downloadable installation guide to plan the job.
What’s in the box
Kit contents
- 1× Red Forged Upper Control Arms 1959RED
- 1× 3.5in Lift Kit 97500991
- 1× M1 MONOTUBE SHOCK PAIR 770780P
- 1× M1 MONOTUBE SHOCK PAIR 770782P
- 1× GM 2011-19 2500 4WD 3.5IN DR KNUCKLE 95730BOX1
- 1× GM 2011-19 2500 4WD 3.5IN PASS KNUCKLE 95730BOX2
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 97640RED kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 97640RED |
| UPC / GTIN | 00840269958540 |
| Lift height | 3.5 in |
| Shock package | M1 series |
| Shipping weight | 137 lb |
| Warranty | 3 Year Limited Warranty |
| Country of origin | CN |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here