
Tuff Country 13742KN 3" Lift Kit with Heavy Duty Front Springs and Rear Blocks with SX8000 Shocks
Tuff Country
13742KN
Pairs well with
Expert Post-Purchase Assistance
Limited Lifetime Warranty
Made in the USA
Free Shipping on Orders over $150

Tuff Country 13742KN 3" Lift Kit with Heavy Duty Front Springs and Rear Blocks with SX8000 Shocks
Product Details
Description
Upgrade a 1988–1991 Chevy or GMC Suburban 4WD with the Tuff Country 13742KN 3-inch lift kit. Designed for durability and straightforward installation, this kit combines heavy‑duty front springs, rear blocks, and SX8000 shocks to lift, level, and empower bigger tires with confidence.
- Lift Height: 3-inch suspension lift that increases ground clearance while preserving drivability and stock geometry.
- Heavy‑Duty Front Springs: Built to handle big‑block engines and snow plow use, delivering reliable load support and consistent ride quality.
- Rear Blocks: Solid rear block and hardware maintain axle positioning and a balanced stance after installation.
- SX8000 Shocks Included: High‑quality shocks provide solid damping for on‑ and off‑road robustness and improved control.
- Noise‑Reduction Pads: Teflon pads help minimize squeaks, ensuring smoother operation over rough terrain.
- Tire Fitment: Supports up to 33" x 12.5" tires for enhanced traction and a tougher, more capable look.
- Vehicle Fitment: Designed for 1988–1991 Chevy Suburban K2500 4WD and 1988–1991 GMC Suburban K2500 4WD; not compatible with diesel engines; intended for 3/4‑ton models.
- Warranty: Backed by Tuff Country’s limited lifetime warranty on leaf springs for long‑term peace of mind.
- Install Time: Typical installation ranges from 4–6 hours, depending on tools and workspace availability.
This kit delivers a practical, purpose‑built upgrade: more ground clearance for challenging terrain, the ability to run larger tires for better traction, and dependable front and rear components designed to handle heavy use. The SX8000 shocks complement the height increase with controlled damping, while the teflon pads reduce noise for a quieter ride. Built on Tuff Country’s 35+ years of suspension experience, this lift kit offers a proven solution for 3/4‑ton Suburbans seeking improved stance and capability, with a warranty that underlines its durability.
| Year Range | Make | Model | Drivetrain | Fitment Note |
|---|---|---|---|---|
| 1988-1991 | Chevy | Suburban K2500 | 4WD | Will Not Fit Diesel Engine Models. Fits 3/4 Ton Models. |
| 1988-1991 | GMC | Suburban K2500 | 4WD | Will Not Fit Diesel Engine Models. Fits 3/4 Ton Models. |
Specifications:
Packaging Details
FAQs
Please read our FAQs page to find out more.
Will this part fit my vehicle?
Fitment varies by year, make, model, drivetrain, and lift height. Always use the vehicle fitment selector or refer to the fitment notes on the product page before purchasing. If you’re unsure, our team can help confirm compatibility.
Are Tuff Country products street legal?
Most Tuff Country products are designed for on-road and off-road use, but local laws and regulations vary by state and country. It is the customer’s responsibility to ensure compliance with local vehicle regulations after installation.
Is professional installation required?
Professional installation is recommended but not required. Many products can be installed by experienced DIYers with proper tools. However, improper installation can affect ride quality, safety, and warranty coverage.
Will this affect my ride quality?
Tuff Country products are engineered to balance ride comfort, performance, and durability. Ride quality can change depending on lift height, vehicle setup, tire size, and other suspension components.
Are Tuff Country products covered by a warranty?
Yes. Tuff Country products are backed by a manufacturer warranty that covers defects in materials and workmanship. Warranty terms vary by product type and do not cover damage caused by misuse, improper installation, or normal wear.
Can I run larger tires with this product?
Many Tuff Country lift kits and suspension components allow for larger tire sizes, but maximum tire clearance depends on wheel offset, tire width, and vehicle configuration. Refer to the product details or contact support for guidance.
What is the return policy?
Unused, uninstalled products may be eligible for return within the stated return window. Items must be in new condition and returned in original packaging. Shipping costs and restocking fees may apply.
Who can I contact if I have questions?
Our customer support team is available to help with fitment questions, installation guidance, and order support. Reach out before purchasing if you want to ensure you’re selecting the right part for your build.
Free shipping on Orders Over $75
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
-
Shipping Information
Use this text to answer questions in as much detail as possible for your customers.
-
Customer Support
Use this text to answer questions in as much detail as possible for your customers.
-
FAQ’s
Use this text to answer questions in as much detail as possible for your customers.
-
Contact Us
Use this text to answer questions in as much detail as possible for your customers.
Selling Suspension Systems for 35+ Years
Tuff Country EZ-Ride Suspension was incorporated over 35 years ago, realizing the desperate need for quality suspension products in the after market world.

