SMX-157715 SUSPENSIONMAXX Block Bolt Kit 1500 4X4 Sierra

Review SUSPENSIONMAXX Suspensionmax 1.5 Inch Block And U-bolt Kit For for SIERRA DENALI 1500 4X4 2015–2018

The SuspensionMaxx SMX-157715 1.5 Block U-Bolt Kit is a premium replacement solution for the factory U-bolts on 2015-2018 Sierra Denali 1500 4x4 vehicles. These U-bolts are crucial suspension components that help secure the leaf springs to the rear axle, ensuring optimal vehicle performance and handling.

This kit consists of six (6) high-strength, 1.5-inch diameter U-bolts, each featuring a robust 1.5-inch diameter block. The blocks offer increased strength and durability compared to the factory bolts, making them an excellent choice for heavy-duty applications, towing, or off-road use.

Each U-bolt in the kit comes with a pair of heavy-duty, zinc-coated, 0.187-inch thick, 3-inch long, and 1.5-inch wide U-bolt plates. These plates provide additional support and stability, ensuring a secure connection between the leaf springs and the axle.

Furthermore, the kit includes six (6) new, high-quality, 1-inch diameter, 3/8-inch thick, and 3.5-inch long shackles. These shackles are precision-engineered to work seamlessly with the new U-bolts, providing a secure and reliable connection between the rear axle and the leaf springs.

Each U-bolt and shackle in the kit is designed and manufactured to meet or exceed OEM specifications, ensuring a perfect fit and reliable performance. This kit is a direct replacement for the factory U-bolts and shackles, making installation straightforward and hassle-free.

In summary, the SuspensionMaxx SMX-157715 1.5 Block U-Bolt Kit is an excellent upgrade for the factory U-bolts on 2015-2018 Sierra Denali 1500 4x4 vehicles. It offers increased strength, durability, and stability, making it an ideal choice for heavy-duty use, towing, or off-road adventures.

Pros and Cons of Buying SuspensionMaxx SMX-157715 1.5 Block U-Bolt Kit for 15-18 Sierra Denali 1500 4x4

The SuspensionMaxx SMX-157715 1.5 Block U-Bolt Kit is designed specifically for the 15-18 Sierra Denali 1500 4x4 vehicles. This kit aims to provide a stronger and more durable suspension system. Let's weigh the pros and cons of investing in this product.

1. Enhanced durability: The 1.5 block u-bolts offer increased strength and longevity compared to the factory-installed u-bolts. This can result in fewer replacements over time, saving money in the long run.

2. Improved performance: By upgrading the u-bolts, you can expect better handling and ride quality. The increased rigidity of the suspension system allows for more precise control and responsiveness.

3. Custom fit: SuspensionMaxx designs its products to be a perfect fit for specific vehicle models, ensuring a seamless installation process and optimal performance.

4. Easy installation: The kit includes all necessary components, making the installation process more straightforward and time-efficient.

1. Cost: The SuspensionMaxx 1.5 block u-bolts kit may be more expensive compared to the factory-installed u-bolts or other aftermarket options.

2. Potential for noise: Some users have reported an increase in noise level after installing the u-bolts. However, this is typically minimal and not a concern for most.

3. Not a complete suspension upgrade: Installing the u-bolts only addresses part of the suspension system. For a more comprehensive upgrade, consider other suspension components as well.

The SuspensionMaxx SMX-157715 1.5 Block U-Bolt Kit offers several advantages, including enhanced durability, improved performance, custom fit, and ease of installation. However, it comes with a higher cost compared to factory-installed u-bolts and may produce some additional noise. Ultimately, the decision to purchase this kit depends on your priorities, budget, and desired level of performance for your 15-18 Sierra Denali 1500 4x4.

If you're looking for a reliable and durable upgrade for your Sierra Denali's suspension system, the SuspensionMaxx SMX-157715 1.5 Block U-Bolt Kit is a solid choice. However, consider your budget and whether you're interested in a more comprehensive suspension upgrade before making the investment. If you're primarily concerned with cost, you may want to explore alternative options.

Details:

100 percent American made and covered our structural lifetime warranty. Heavy duty rear block and u-bolt kit 1.5 inch for 2015 -2018 GMC Sierra Denali 1500 magnetic ride 4X4/ 2x4 6-bolt wheel with 0.5625 inch diameter u-bolts. Applications. Designed specifically for your 2015 -2018 Sierra Denali.

Ideal for leveling or lifting vehicles, adding larger wheels and tires, hauling heavy loads. Suspensionmax includes all hardware needed and components are quickly installed using job specific tools. Retains factory comfort and geometry: keeps driveling angles leaf spring function optimized for everyday driving or off-road action. Made in America and covered under the max structural lifetime warranty.

Strong and durable-steel blocks, high strength u-bolts fasteners. Heavy-duty construction: CBC-machined from high-strength steel or aluminum for maximum durability. When its time to raise the rear of your truck, you want a solution that's simple, strong, and built last. Block and u-bolt kits can also be used to level vehicles that carry heavy loads.

Our block and u-bolt kits simply fit between rear leaf springs axle to compensate for suspension compression restore ride height . Suspensionmax provides application coverage for the most vehicles and largest number of height configuration options per vehicle. Installation involves no major alterations to the vehicle and truck or SUV can easily be put back stock specifications. Suspensionmax heavy duty block and u-bolt rear leaf spring leveling kits are the perfect solution for lifting or of trucks Suva carrying loads including campers.

Material steel. Position rear. Whether you're leveling your stance, prepping for big tires, or hauling more with stability, suspensionmax lift blocks make sure raised the right way. Direct bolt-on install: installs easily between axle and leaf springs using existing hardware or included u-bolts.

Suspensionmax heavy duty block and u-bolt kits are made with quality alloy metals for high strength long life-they wont crack or compress. Multiple height options: choose the perfect amount of lift to match your build and tire setup. Percussion machined to work with magnetic ride sensors no change in or handling. Why truck owners trust suspensionmax rear lift blocks: ideal for leveling or towing loads: raise the rear to match a front lift compensate added weight.

2015 -2018 GMC Sierra Denali 1500 magnetic ride 4X4 and 2wd. Require no extensive modifications to the vehicle-totally reversible. Such loads can cause rear suspension to compress and sag-thereby reducing ride height .

specifications liftkitsparts:

• for models: 1500, 4x4, Sierra, Denali
• for years: 2015–2018
• brand: Suspensionmaxx
• mpn: Smx-157715
• part type: Block Bolt
• included hardware: Mounting Hardware
• fitment type: Performance/custom
• lift height: 1.5 Rear
• country/region of manufacture: United States
• placement on vehicle: Rear
• performance part: Yes

shipping liftkitsparts:

• class: standard, one-day, expedited
• transit: 5-9 days
• service: ups ground, fedex priority overnight, fedex 2day
• carrier: ups, fedex
• type: fixed

offer liftkitsparts:

• sold #: 18
• options: ship-to-home
• price: $149.99
• item condition: New
• availability: in stock
• started: august 22, 2025
• in stock #: 1

payments liftkitsparts:

• other
• credit card: visa
• wallet: google-pay

general liftkitsparts:

• category: Auto Parts > Chassis, Suspension Brakes > Lift Kits

returns liftkitsparts:

• policy: returns accepted
• time: 30 days
• paid by: seller

seller liftkitsparts:

• city: cincinnati, ohio
• # reviews: 2716
• rating: 97.5%