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Build a Balanced Classic GM Suspension System
Skyjacker C125AKS-H is a 2.5 inch suspension lift system for classic GM half ton truck, Blazer, Jimmy, and Suburban applications. It combines application matched suspension geometry with durable components for street, towing, and off road use while maintaining predictable control.
Key Features
- Matched 2.5 inch front and rear Softride leaf springs for the C125AKS-H package
- Progressive multileaf spring design for controlled ride quality
- Front and rear U bolt kits with suspension bushings
- Shock configuration: Hydro shocks
- Designed to improve ground clearance and accommodate larger tires
- Limited lifetime manufacturer warranty
Fitment
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 1973 to 1974 | Chevrolet | Blazer | |
| 1987 | Chevrolet | Blazer | Custom Deluxe |
| 1987 | Chevrolet | Blazer | Silverado |
| 1975 to 1981 | Chevrolet | K10 | Cheyenne |
| 1981 to 1986 | Chevrolet | K10 | Custom |
| 1975 to 1980 | Chevrolet | K10 | Custom Deluxe |
| 1981 | Chevrolet | K10 | Deluxe |
| 1975 to 1986 | Chevrolet | K10 | Silverado |
| 1973 to 1974 | Chevrolet | K10 Pickup | |
| 1976 | Chevrolet | K5 Blazer | |
| 1975 to 1980 | Chevrolet | K5 Blazer | Cheyenne |
| 1981 to 1986 | Chevrolet | K5 Blazer | Custom |
| 1975 | Chevrolet | K5 Blazer | Custom Deluxe |
| 1981 | Chevrolet | K5 Blazer | Deluxe |
| 1984 | Chevrolet | K5 Blazer | Scottsdale |
| 1978 | Chevrolet | K5 Blazer | Silverado |
| 1980 to 1986 | Chevrolet | K5 Blazer | Silverado |
| 1987 | Chevrolet | V10 | Custom Deluxe |
| 1987 | Chevrolet | V10 | Scottsdale |
| 1987 | Chevrolet | V10 | Silverado |
| 1975 to 1985 | GMC | Jimmy | High Sierra |
| 1975 to 1987 | GMC | Jimmy | Sierra Classic |
| 1975 to 1982 | GMC | Jimmy | Sierra Grande |
| 1975 to 1978 | GMC | K15 | |
| 1975 to 1978 | GMC | K15 | High Sierra |
| 1977 | GMC | K15 | Indy Hauler |
| 1975 to 1978 | GMC | K15 | Sierra Classic |
| 1975 to 1978 | GMC | K15 | Sierra Grande |
| 1979 to 1986 | GMC | K1500 | |
| 1979 to 1986 | GMC | K1500 | High Sierra |
| 1979 to 1986 | GMC | K1500 | Sierra Classic |
| 1979 to 1982 | GMC | K1500 | Sierra Grande |
| 1987 | GMC | V1500 | |
| 1987 | GMC | V1500 | High Sierra |
| 1987 | GMC | V1500 | Sierra Classic |
Specifications
| Detail | Value |
|---|---|
| Manufacturer Part Number | C125AKS-H |
| UPC | Not provided |
| Product Type | Suspension lift system |
| Lift Height | 2.5 inches |
| Spring Configuration | Front and rear progressive multileaf springs |
| Rear Spring Requirement | Application specific replacement rear springs |
| Shock Configuration | Hydro shocks |
| Warranty | Limited lifetime |
What's Included
- Matched front leaf springs
- Matched rear leaf springs
- Front and rear U bolt kits
- Suspension bushing kit
- Hydro shocks
- Application matched components for C125AKS-H
About Skyjacker
Skyjacker has engineered suspension systems in West Monroe, Louisiana since 1970. The C125AKS-H application reflects the brand's focus on vehicle specific spring geometry, controlled ride quality, and durable components backed by a limited lifetime warranty.
Related Parts
- Skyjacker 2.5"SR 73-87 GM 1/2 W/RR SP
- Skyjacker 2.5"SR 73-87 GM 1/2 W/RR SP
- Skyjacker 2.5"SYS 73-87 1/2T SUB 52"
FAQ
What is the C125AKS-H?It is a 2.5 inch suspension lift system for classic GM half ton truck, Blazer, Jimmy, and Suburban applications. The package is engineered as an application matched Skyjacker suspension solution for controlled ride height, clearance, and handling.
How much lift does this system provide?The system is designed for approximately 2.5 inches of suspension lift on supported classic Chevrolet and GMC applications.
Are front and rear springs included?Yes. The system includes matched front and rear Softride leaf springs.
Are shocks included?The listed shock configuration is hydro shocks. Confirm the selected package before ordering.
Does the kit include U bolts and bushings?Yes. Front and rear U bolt kits and the required suspension bushings are included.
Does the Suburban version require 52 inch rear springs?Yes. Suburban applications in this family are specifically identified for vehicles equipped with 52 inch rear springs.
Is a dropped pitman arm required?Some applications require a compatible steering correction component that is not included. Verify the complete application instructions before installation.
Can larger tires be installed after the lift?The added clearance can support larger tires, but actual fit depends on wheel offset, tire width, body clearance, and steering travel.
Install Instructions
- Confirm C125AKS-H matches the vehicle and complete suspension configuration before disassembly.
- Raise and securely support the frame and axles according to the factory service procedure.
- Remove the original shocks, U bolts, springs, and related hardware one axle at a time.
- Install the supplied bushings and position the front and rear springs in the correct orientation.
- Install the axles with the supplied U bolts and tighten the hardware evenly.
- Install the selected shocks when included and verify brake line, driveshaft, steering, and exhaust clearance.
- Lower the vehicle to normal ride height before final tightening of pivot hardware.
- Perform a professional alignment and retorque the U bolts after the initial break in mileage.
Prop 65 Warning
WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov.
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