6-Inch Lift Kit with M1 Struts for 2022–2024 Silverado 1500 4WD
- Fits compatible 2022–2024 Chevrolet Silverado 1500 4WD — see the full fitment table for trim coverage
- Built around an M1 loaded strut pair and an M1 monotube shock pair
- Does not fit LT Trail Boss, Custom Trail Boss, ZR2, or Adaptive Ride Control trucks
- Factory wheels will not work — 20-inch or larger aftermarket wheels with 4.5in backspacing required
- Cutting and drilling required — downloadable installation guide available
The Trail Fortress check
Will it fit your truck?
✓ Fits
✕ Does not fit
- 2019 "Classic" models
- Models with Adaptive Ride Control
- LT Trail Boss or Custom Trail Boss models
- ZR2 models
- Factory wheels
Requires cutting and drilling. 20-inch or larger aftermarket wheels are required. Wheels must feature 4.5in backspacing to fit. Please test fit wheels prior to installation. Some aftermarket wheels may require 0.25" wheel spacer #1065. Fitment on this page is based on the manufacturer’s application data.
About this kit
6-Inch Lift Kit with M1 Struts, fitment-checked
Rough Country 21640 is a 6-inch lift kit for compatible 2022–2024 Chevrolet Silverado 1500 4WD trucks, built around an M1 loaded strut pair and an M1 monotube shock pair. Aftermarket wheels 20 inches or larger with 4.5in backspacing are required — factory wheels will not clear. Trail Boss, ZR2, Adaptive Ride Control, and 2019 Classic body-style trucks are outside the fitment.
This 6-inch lift kit for the 2022–2024 Chevrolet Silverado 1500 4WD is a complete package: driver and passenger knuckle boxes, a high-clearance crossmember box, a front full skid plate, a mono-leaf rear kit box, and the M1 strut and monotube shock pairs. Installation calls for cutting and drilling, so plan the driveway time accordingly. Confirm your truck is not equipped with Adaptive Ride Control before ordering, and test-fit wheels first — some aftermarket wheels need the 0.25 inch spacer. A downloadable installation guide is available, and shipping weight is 275 lb.
What’s in the box
Kit contents
- 1× 6in Kit Dr Knuckle Box 21730BOX5
- 1× 6in Kit Ps Knuckle Box 21730BOX6
- 1× 6in Kit Crossmember Box 217BOX11
- 1× Universal Kit Box 21630991
- 1× FR Full Skid 217BOX3
- 1× M1 Loaded Strut Pair 502067
- 1× M1 MONOTUBE SHOCK PAIR 770739P
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 21640 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 21640 |
| UPC / GTIN | 00840269922787 |
| Lift height | 6 in |
| Shock package | M1 series |
| Shipping weight | 275 lb |
| Country of origin | US |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here