Rough Country 12630 6 Inch Lift Kit · 52 Inch Rear Springs Chevy/GMC C10/K10 Truck & SUV/K5 Blazer (73-76)
- Front lift 6"
- Install 6-8 hours
Questions about fitment? Live chat or call 866-235-4715
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- Free shippingMost orders $500+
- 30-day returnsSee policy
- Warranty supportWe work with the maker
Questions about fitment?
Talk to a TRU specialist
We’ll help you verify fitment before you buy.
Veteran-owned · Austin, Texas · Mon–Fri 9:30a–11:00a & 1:00p–5:30p CT
Important notes before you order
- 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.
- For a visual, please click here .
- Vehicles with factory quad shocks (2 front shocks per side) will simply use a single aftermarket shock.
TRU specialist notes
From the Trucks R Us fitment and install team, beyond the manufacturer's information.
- Plan for a professional wheel alignment after installing any lift or leveling kit.
- Going to bigger tires as well? Speedometer recalibration may be needed, and some tire and wheel combinations need trimming. Check the recommended wheels and tires, or ask us before you order.
Specifications
| Brand | Rough Country |
|---|---|
| Part number | 12630 |
| UPC / GTIN | 8430301457360 |
| Front Lift Height | 6" |
| Front | Lifted Leaf Springs Steering Arm Brake Line Relocation Brackets U-Bolts Hardware |
| Rear | Lifted Leaf Springs U-Bolts Hardware |
| Install time | 6-8 hours |
| Weight (lbs) | 278.00lbs |
| Country of Origin | CN |
| Warranty | Manufacturer’s Warranty Statement |
What's in the box
| Qty | Part | Description |
|---|---|---|
| — | — | Front: Lifted Leaf Springs Steering Arm Brake Line Relocation Brackets U-Bolts Hardware |
| — | — | Rear: Lifted Leaf Springs U-Bolts Hardware |
Features
- Boosted ground clearance: gain the extra height needed for better off-road capability and obstacle clearance.
- Application-specific front & rear leaf springs: engineered for a perfect fit and optimal ride quality.
- Clears 37-inch tires: provides ample room to run up to a 37" tall tire with no rubbing.
- Raised steering arm included: corrects steering geometry for precise handling and improved alignment.
- Premium n3 series shocks: includes application-valved n3 shock absorbers for balanced on-road comfort and off-road control.
Fitment
| Years | Vehicle |
|---|---|
| 1973-1974 | Chevrolet Blazer 4WD: Base |
| 1975-1976 | Chevrolet K10 4WD: Cheyenne, Custom Deluxe, Scottsdale, Silverado |
| 1975-1976 | Chevrolet K10 Suburban 4WD: Custom Deluxe, Scottsdale, Silverado |
| 1976 | Chevrolet K5 Blazer 4WD: Base |
| 1975-1976 | Chevrolet K5 Blazer 4WD: Cheyenne |
| 1975 | Chevrolet K5 Blazer 4WD: Custom Deluxe |
| 1973-1976 | GMC Jimmy 4WD: Base |
| 1975-1976 | GMC Jimmy 4WD: High Sierra, Sierra Classic, Sierra Grande |
| 1975-1976 | GMC K15 4WD: Base, High Sierra, Sierra Classic, Sierra Grande |
| 1975-1976 | GMC K15 Suburban 4WD: Base, High Sierra, Sierra Classic, Sierra Grande |
| 1973-1974 | GMC K15/K1500 Pickup 4WD: Base |
| 1973-1974 | GMC K15/K1500 Suburban 4WD: Base |
Use the fit check above with your truck selected, or ask a specialist if your trim isn't listed.
Recommended wheels & tires
8 tire and wheel combinations from Rough Country.
| Tire | Wheel | Bolt Pattern | Offset | Note |
|---|---|---|---|---|
| 37x13.50R15 | 15x8 | 6x5.5 | +0 | – |
| 37x13.50R15 | 15x8 | 6x5.5 | +1 | – |
| 37x12.50R17 | 17x9 | 6x5.5 | -12 | – |
| 37x12.50R18 | 18x9 | 6x5.5 | -12 | – |
| 37x12.50R20 | 20x9 | 6x5.5 | -12 | Minor Trimming |
| 37x12.50R20 | 20x10 | 6x5.5 | -25 | Minor Trimming |
| 37x12.50R20 | 20x10 | 6x5.5 | -24 | Minor Trimming |
| 37x12.50R22 | 22x10 | 6x5.5 | -25 | Minor Trimming |
Installation
- Estimated install time6-8 hours
Free install support from the Trucks R Us tech team, for you or your shop.
Overview
Transform Your Truck's Stance and Capability: Upgrade your GM truck from front to back with Rough Country's 6" Suspension Lift Kit. This premium lift delivers a leveled, aggressive look while enhancing ride height and off-road readiness all with an easy bolt-on installation. Engineered for Superior Ride Quality: This kit features application-specific front and rear lifted leaf springs, delivering increased ground clearance without compromising ride comfort or control. By eliminating rear lift blocks, the kit ensures consistent lift and improved suspension geometry, resulting in a smooth, factory-like ride. Brake line brackets are also included to maintain proper alignment and safety throughout the suspension travel. Enhanced Performance with N3 Series Shocks: Rough Country's N3 series shocks come standard valved for your exact application and designed to provide a perfect balance of on-road smoothness and off-road capability. Featuring a 10-stage variable valving system, high-pressure nitrogen charge, and durable 54mm shock body with 18mm piston rod, these shocks are built for performance and longevity. Room for Bigger Tires: Make room for aggressive wheel and tire combos. This 6" lift offers enough clearance to run up to a 37" tall tire with proper backspacing, giving your truck the rugged stance it deserves. Improved Steering and Handling: To maintain proper drivability, a raised steering arm is included correcting steering geometry for tight, responsive handling after the lift. Limited Lifetime Warranty: Rough Country backs this kit with a Limited Lifetime Warranty, giving you long-term confidence on and off the road.
Questions
Will this fit my truck?
Select your truck at the top of the page and the fit check will confirm it. If your exact trim is not listed, call 866-235-4715 or live chat and a fitment specialist will check it before you order.
Do you help with installation?
Yes. Our technical team helps you or your shop with installation and troubleshooting after delivery, on top of the manufacturer’s support.
What if the part has a problem?
We work the warranty claim with the manufacturer on your behalf, within the manufacturer’s warranty policy.
Can I return it?
Most items can be returned within 30 days. See our return policy for details.
Do I need an alignment after installing?
Yes. Any lift or leveling kit changes suspension geometry, so get a professional alignment after installation.
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About Rough Country
Rough Country is a leading manufacturer and distributor of off-road accessories and suspension systems. Built on a foundation of American values and rooted in Tennessee, we use our expertise of trucks, Jeeps, and UTVs to help people drive their passions... Shop all Rough Country