3.5-Inch Lift Kit with M1 Shocks for 2007–2013 Silverado/Sierra 1500 — Part 27740
- Fits compatible 2007-2013 Silverado 1500 4WD and Sierra 1500 4WD/AWD, plus 2010-2013 Sierra SLE and SLT — review the full fitment list
- Kit contents: M1 loaded strut pair, M1 monotube shock pair, and forged upper control arms for 2.5-3.5 inch lift
- Does not fit factory stamped steel control arms, 2014-2016 Denali with Magnetic Ride Control, or eAssist (ECO Hybrid) models
- A front differential mass damper, where fitted, must come off for clearance; the factory rear block is replaced
- Trucks keeping factory wheels: tires no wider than 11.5 inches advised, with a 0.25 inch spacer (SKU 1065) for added clearance
- Cutting and grinding required — downloadable installation guide available. Shipping weight: 105 lb
The Trail Fortress check
Will it fit your truck?
✓ Fits
✕ Does not fit
- Models with factory stamped steel control arms
- 2014-2016 Denali models
- Models with eAssist (ECO Hybrid) package
Requires cutting and grinding. This kit fits models with both cast steel or aluminum factory control arms. Please use our 3.5" knuckle kit. To ensure proper fit please confirm if the stock control arms are cast aluminum cast steel or stamped steel. New lift block replaces the factory equipped block. To ensure adequate clearance when lowering the differential models equipped with a mass damper on the front differential must be removed. Models retaining factory wheels are advised to run no wider than a 11.5" wide tire. 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
Rough Country 27740 is a 3.5-inch lift kit for compatible 2007-2013 Chevrolet Silverado 1500 4WD and GMC Sierra 1500 4WD/AWD trucks. It ships as a kit with an M1 loaded strut pair, an M1 monotube shock pair, and forged upper control arms. Installation calls for cutting and grinding, and the kit will not work with factory stamped steel control arms.
This 3.5-inch lift kit covers 2007-2013 Chevrolet Silverado 1500 4WD along with 2007-2013 GMC Sierra 1500 4WD and AWD trims, plus the 2010-2013 Sierra SLE and SLT applications listed in the fitment section. The box holds an M1 loaded strut pair, an M1 monotube shock pair, and forged upper control arms rated for 2.5-3.5 inches of lift. Cutting and grinding are part of the job. Confirm whether your factory control arms are cast steel or cast aluminum before ordering, since stamped steel arms call for the 3.5-inch knuckle kit instead. A downloadable installation guide is available.
What’s in the box
Kit contents
- 1× 3.5" Kit Box 12170BOX1
- 1× M1 Loaded Strut Pair 502084
- 1× M1 MONOTUBE SHOCK PAIR 770738P
- 1× Forged Upper Control Arms 19401A
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 27740 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 27740 |
| UPC / GTIN | 00840269910685 |
| Lift height | 3.5 in |
| Shock package | M1 series |
| Shipping weight | 105 lb |
| Country of origin | CN |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
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