Upgrade Stainless Steel 2-4 in Rear Shock Extensions - Rear Lift

In this review the Upgrade Stainless Steel 2-4 in rear shock extensions are evaluated for owners who want a quick, durable way to level the rear of full-size GM trucks and SUVs. The reviewer found the kit best for Silverado and Sierra 1500 owners and other 2007-2021 GM 1500-series SUVs who need a modest rear lift without replacing shocks. The single biggest reason to buy is the durable 630 stainless steel one-piece construction and Grade 10.9 hardware that promise long service life and corrosion resistance for trucks used in mixed climates.

Key Features

• Fitment: Designed to lift and level the rear 2-4 in on compatible Chevy, GMC and Cadillac 1500 models, so owners can correct rake or fit larger tires without major suspension changes.
• Material: Made from 630 stainless steel, the extenders resist rust and look cleaner over time compared with typical plated steel options.
• One-piece molding: The one-piece cast design avoids welded joints and reduces breakage risk, improving strength where it connects to the factory shock.
• Hardware: Includes Grade 10.9 bolts and nuts, which are stronger than standard hardware and help maintain secure connections under load.
• Vibration reduction: Integrated shock-absorbing bushings at connection points reduce transmitted vibration and make the rear ride feel more controlled after installation.
• Kit contents: The package includes two stainless steel extenders, two Grade 10.9 bolts, two nuts and two flat pads for a complete simple installation.

Who It's For

This kit is best for owners of Chevy Silverado 1500 and GMC Sierra 1500 trucks (2WD or 4WD) from 1999-2024 and a range of 2007-2021 GM SUVs who want a modest 2-4 in rear lift without changing shocks or adding complex suspension components. It is also suited to drivers who prioritize corrosion resistance and stronger hardware for long-term use.

People who have air suspension or an automatic leveling system should look elsewhere because the extenders are not compatible with those setups. Anyone needing front lift components, full suspension replacement, or adjustments beyond a simple rear level should consider a different solution.

Pros & Cons

Pros

• Durable 630 stainless steel construction resists rust and extends kit life.
• Strong Grade 10.9 bolts and one-piece molding add structural reliability under load.
• Includes shock-absorbing bushings to reduce vibration and improve ride comfort after installation.
• Simple kit contents make for a straightforward swap on compatible rear shocks.

Cons

• Not compatible with air suspension or vehicles that use an auto-leveling system.
• Only addresses rear ride height; those needing a full suspension lift will require additional components.

Specifications

Our Verdict

The Upgrade Stainless Steel 2-4 in rear shock extensions are a practical value for truck and SUV owners who want a reliable rear leveling solution without replacing shocks. The stainless one-piece construction and high-grade hardware make it a durable option for long-term use, while the vibration-reducing bushings improve comfort. Buy this if you need a modest rear lift and corrosion resistance; avoid it if your vehicle has air or auto-leveling suspension.

Frequently Asked Questions

Will these work with air suspension?
No. These rear shock extensions are not compatible with air suspension or automatic leveling systems.

Do they include bolts and nuts?
Yes. The kit includes two Grade 10.9 bolts, two nuts and two flat pads along with the extenders.

How much lift do they provide?
They are designed to lift the rear 2-4 in depending on installation and vehicle configuration.