4.5-Inch Lift Kit with M1 Shocks for Silverado/Sierra 1500 2WD
- Fits 1999-2007 Chevy Silverado 1500 and GMC Sierra 1500 2WD, including Classic and 1500 HD listings
- 6-lug wheels only; does not fit 2004-2006 trucks with torsion-bar front suspension
- Kit contents: 2-inch front coils, 3-inch lift knuckles, 3-inch rear block and U-bolt set, two M1 monotube shock pairs
- Bolt-on installation with no cutting or drilling; clears tires up to 33 inches
- Downloadable installation guide available
The Trail Fortress check
Will it fit your truck?
✓ Fits
+ 5 more applications
✕ Does not fit
- 2004-2006 models with torsion bar front suspension
ONLY fits models with 6 lug wheels. Fitment on this page is based on the manufacturer’s application data.
About this kit
4.5-Inch Lift Kit with M1 Shocks, fitment-checked
Rough Country 23940 is a 4.5-inch lift kit for 2WD Chevy Silverado 1500 and GMC Sierra 1500 half-tons, 1999-2007 including Classic and 1500 HD applications. The kit pairs 2-inch front coils and 3-inch lift knuckles with a 3-inch rear block and U-bolt set, plus two M1 monotube shock pairs. It fits only trucks with 6-lug wheels and does not fit 2004-2006 trucks using torsion-bar front suspension.
This 4.5-inch lift kit for the 1999-2007 Chevy Silverado 1500 and GMC Sierra 1500 2WD covers Base through LT, SS, SLT and WT trims, plus the 1500 HD and Classic listings in the fitment section. Rough Country builds the lift from 2-inch front coils, 3-inch knuckles, and a 3-inch rear block and U-bolt kit, with M1 monotube shocks at all four corners. It bolts on without cutting or drilling and opens up room for tires as large as 33 inches. Confirm you have 6-lug wheels and coil-spring front suspension, then pull the downloadable installation guide before you start.
What’s in the box
Kit contents
- 1× 3in Block&U-Bolt 6564
- 1× 3 Inch Lift Knuckles 7501
- 1× M1 MONOTUBE SHOCK PAIR 770739P
- 1× M1 MONOTUBE SHOCK PAIR 770857P
- 1× 2in Coils 9258
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 23940 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 23940 |
| UPC / GTIN | 00840269917127 |
| Lift height | 4.5 in |
| Shock package | M1 series |
| Shipping weight | 117 lb |
| Country of origin | CN |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here