MaxTrac 401500 Rear Shock Extenders Fits 2007–18 Silverado 1500

Keep Factory Shocks Working on Your Lowered Silverado or Sierra

Lowering your truck doesn't always mean replacing your rear shocks. The MaxTrac 401500 Rear Shock Extenders are designed to relocate the lower shock mounting point, allowing factory-length shocks to function properly on 2007–2018 Chevrolet Silverado 1500 and GMC Sierra 1500 trucks with a 4"–7.5" rear drop.

Built from heavy-duty steel and finished in durable grey powdercoat, these shock extenders help optimize suspension travel and ride quality after lowering. They're also compatible with factory Autoride and MagneRide shock systems, making them an excellent solution for maintaining factory ride characteristics while achieving a lowered stance.

Key Features

Designed for 4"–7.5" Rear Drops

Engineered specifically for Silverado and Sierra lowering applications.

Works with Factory-Length Shocks

Allows retention of OEM rear shocks in many lowered setups.

Compatible with Autoride & MagneRide

Designed to work with factory electronic suspension systems.

Improves Shock Operating Range

Helps position shocks correctly after lowering for improved suspension function.

Heavy-Duty Steel Construction

Built for durability and long-term performance.

Grey Powdercoat Finish

Protects against rust, corrosion, and road debris.

Simple Bolt-On Installation

Installs without cutting or welding.

What's Included

One Pair of Rear Shock Extenders

Driver Side Bracket

Passenger Side Bracket

Installation Hardware

Vehicle Fitment

Fits

2007–2018 Chevrolet Silverado 1500

2007–2018 GMC Sierra 1500

2WD & 4WD Models

Important Notes

Must be used in conjunction with 4"–7.5" rear lowering kits.

Compatible with factory Autoride and MagneRide shock systems.

MaxTrac does not recommend using wheels wider than 9" or wheels with less than 4.5" backspacing. Doing so will void all manufacturer warranties.

Product Specifications

Part Number: 401500

UPC: 738283445736

Kit Type: Lowering Accessory

Material: Steel

Finish: Grey Powdercoat

Color: Grey

Weight: 6 lbs

Dimensions: 9" x 4" x 3"

Country of Origin: China

Sold As: Pair

Why Choose MaxTrac Shock Extenders?

The MaxTrac 401500 Rear Shock Extenders offer a simple and cost-effective way to retain your factory shocks after lowering your Silverado or Sierra. By relocating the lower shock mount, these brackets help support proper suspension movement, improve ride quality, and reduce the need for replacement shocks—while remaining compatible with factory electronic suspension systems.

Perfect For

Lowered Silverado builds

Lowered Sierra projects

Street truck suspension upgrades

Rear flip kit installations

Autoride suspension applications

MagneRide suspension applications

Custom truck stance builds

Daily driven lowered trucks