4-Inch Lift Kit with N3 Shocks for 1969–1972 Chevy & GMC 4WD
- Fits 1969–1972 Chevy Blazer, K10 and K20, and 1970–1972 GMC Jimmy, K15/K1500 and K25/K2500 4WD
- 4-inch front and 2-inch rear application-specific leaf springs with N3 series shocks
- Room for tires up to 35 inches tall
- Only fits trucks with 52-inch rear leaf springs — measure eyelet to eyelet to confirm
- Front sway bar equipped: drop brackets, part 1019, are recommended
- Install time: 6–8 hours. Shipping weight: 227 lb
Check tire fit for this kit → The manufacturer publishes 14 verified tire sizes for this kit, with wheel width, bolt pattern and offset for each.
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ONLY fits models with 52" rear leaf springs. If vehicle is equipped with a front sway-bar drop brackets are recommended SKU: 1019. Rear Spring Measurement: To confirm rear spring size a measurement will have to be pulled from eyelet to eyelet. Fitment on this page is based on the manufacturer’s application data.
About this kit
4-Inch Lift Kit with N3 Shocks, fitment-checked
Front and rear leaf springs, not spacers: Rough Country 18030 lifts 1969–1972 Chevy K10 and K20 pickups, K10 Suburban, and Blazer, along with the GMC Jimmy and K15/K25 trucks, 4 inches with N3 shocks front and rear. It clears 35-inch tires and only fits trucks with 52-inch rear leaf springs — measure eyelet to eyelet before ordering.
Application-specific leaf springs go in at both ends — 4-inch fronts and 2-inch rears — along with U-bolts, brake line relocation brackets, and two pairs of N3 shocks. The list covers 4WD Chevrolet Blazer from 1969–1972, K10 pickup and K10 Suburban and K20 pickup in 1969, and GMC Jimmy, K15/K1500 pickup and Suburban, and K25/K2500 pickup from 1970–1972. Confirm the truck has 52-inch rear leaf springs by measuring eyelet to eyelet. Sway-bar-equipped trucks do better with drop brackets, part 1019. Budget 6–8 hours for the work. Shipping weight: 227 lb.
What’s in the box
Kit contents
- 1× Universal U-Bolt Kit 7609$39.95
- 2× 4in Front Leaf Spring 8001
- 1× FR Inst. Kit 7564
- 2× 2in Rear Leaf Spring 8100
- 1× N3 Shock Pair 23204
- 1× N3 Shock Pair 23173
Priced components are sold separately here, so a worn shock or arm can be replaced on its own later.
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 18030 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 18030 |
| UPC / GTIN | 00843030150624 |
| Lift height | 4 in |
| Shock package | N3 series |
| Shipping weight | 227 lb |
| Country of origin | IN |
| Category | Suspension & Lift Kits › Lift Kits |
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