6-Inch Lift Kit with M1 Shocks for Chevy & GMC 8-Lug
- Chevrolet K2500 and K3500, GMC K3500, 1999-2000, 4WD
- M1 monotube shocks with a 5-inch block and U-bolt set
- 8-lug models ONLY; does NOT fit standard or extended cab or AutoTrac
- Requires minor cutting and grinding, and exhaust rerouting
The Trail Fortress check
Will it fit your truck?
✓ Fits
✕ Does not fit
- 1999-2000 standard or extended cab models
- Models with AutoTrac
- Straight front axle models
- Dually models
ONLY fits models with 8-Lug wheels. Requires minor cutting and grinding. Requires rerouting of the exhaust for front driveshaft clearance. Fitment on this page is based on the manufacturer’s application data.
About this kit
6-Inch Lift Kit with M1 Shocks, fitment-checked
The M1 monotube build of Rough Country's 6-inch 8-lug kit. Three versions exist for this truck and the shock package plus the rear block is what separates them.
This build pairs M1 monotube shocks, front and rear, with a 5-inch GM block and U-bolt set — the entry-level version of this kit carries N3 shocks and no block at all, so the box differs substantially even though the truck does not. Coverage is the Chevrolet K2500 and K3500 and GMC K3500 across 1999 to 2000 in 4WD, and it takes an 8-lug steering assembly and a skid plate box as well. Shipping weight: 207 lb.
What’s in the box
Kit contents
- 1× 6in Crossmember Kit Box 16130BOX1
- 1× 8-Lug 6in Kit Box 16130BOX2
- 1× 8-Lug Steering Assembly 16130BOX3
- 1× Skid Plate Box 16130BOX5
- 1× 5IN BLOCK U BOLT GM 1613
- 1× M1 MONOTUBE SHOCK PAIR 770768P
- 1× M1 MONOTUBE SHOCK PAIR 770790P
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 16140 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 16140 |
| UPC / GTIN | 00840269969218 |
| Lift height | 6 in |
| Shock package | M1 series |
| Shipping weight | 207 lb |
| Country of origin | US |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here