6-Inch Lift Kit with M1 Struts for Silverado/Sierra 1500 (2019-2024)
- Fits supported 2019-2024 Silverado 1500 and Sierra 1500 4WD Trail Boss and AT4 trims, plus listed 2022 LTD/Limited applications
- Excludes diesel-engine trucks, Denali with Magnetic Ride Control, and 2019 Classic body-style models
- Aftermarket wheels 20 inches or larger with 4.5in backspacing required — test-fit before installation
- Kit includes cast knuckles, high-clearance crossmember, front full skid, M1 loaded struts, and M1 monotube shocks
- Cutting and drilling required — downloadable installation guide available
The Trail Fortress check
Will it fit your truck?
✓ Fits
+ 1 more applications
✕ Does not fit
- GMC Denali models with Magnetic Ride Control
- 2019 "Classic" models (2018 body style) ONLY fits Trailboss and AT4 models Requires cutting and drilling
- Factory wheels 20-inch or larger aftermarket wheels are required
- Diesel engine models
About this kit
6-Inch Lift Kit with M1 Struts, fitment-checked
Rough Country 27540 is a 6-inch lift kit built around an M1 loaded strut pair and an M1 monotube shock pair for supported 2019-2024 Chevy Silverado 1500 and GMC Sierra 1500 4WD trucks. Fitment is limited to Trail Boss and AT4 trims. Factory wheels will not work — aftermarket wheels 20 inches or larger with 4.5in backspacing are required, and the install calls for cutting and drilling.
This 6-inch lift kit for the 2019-2024 Chevy Silverado 1500 and GMC Sierra 1500 4WD covers Trail Boss and AT4 trims, plus the 2022 Silverado 1500 LTD and Sierra 1500 Limited applications listed in the fitment section. Contents include driver- and passenger-side knuckle boxes, a high-clearance crossmember box, a front full skid, a universal hardware box, an M1 loaded strut pair, and an M1 monotube shock pair. Cutting and drilling are part of the job. Diesel-engine trucks, Denali models with Magnetic Ride Control, and 2019 Classic body-style trucks are excluded. Use the downloadable Rough Country installation guide to plan the weekend.
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 217BOX1A
- 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 27540 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 27540 |
| UPC / GTIN | 00840269917196 |
| Lift height | 6 in |
| Shock package | M1 series |
| Shipping weight | 278 lb |
| Country of origin | US |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here