Tuff Country 37703 Rear Ubolt Kit for Use with Blocks - 3" To 4"
Tuff Country
37703
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Tuff Country 37703 Rear Ubolt Kit for Use with Blocks - 3" To 4"
Product Details
Description
Restore secure, durable rear leaf-spring mounting on lifted GMC 4x4s with the Tuff Country 37703 Rear U-Bolt Kit. Designed for 3" to 4" block lifts, this corrosion-resistant kit replaces factory hardware to maintain proper alignment and ride quality.
- Lift range compatibility: specifically engineered for rear suspensions with 3"–4" block lifts on select GMC 4WD models.
- Material & finish: zinc-plated steel construction provides corrosion resistance for long-lasting performance in varied driving conditions.
- Includes hardware: includes U-bolts together with the necessary nuts and washers for installation.
- Designed for GMC fitment: compatible with 1969–1987 GMC Blazer 4WD, 1969–1972 GMC Suburban K2500 4WD, and 1969–1987 GMC Truck 4WD (3/4-ton models).
- Block-ready design: tailored to work with leaf-spring blocks to maintain correct axle positioning after suspension modifications.
This rear U-bolt kit from Tuff Country provides a reliable, rust-resistant mounting solution for lifted GMC trucks. By replacing worn or missing factory hardware, it helps keep the rear axle securely clamped to the lift blocks, supporting stable handling, maintained ride height, and improved safety in both everyday driving and off-road use.
| Year Range | Make | Model | Drivetrain | Fitment Note |
|---|---|---|---|---|
| 1969–1987 | GMC | Blazer | 4WD | |
| 1969–1972 | GMC | Suburban K2500 | 4WD | Fits 3/4 Ton Models. |
| 1969–1987 | GMC | Truck | 4WD |
Specifications:
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.
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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.