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Trusted Gear for Serious Off-Roaders!
Trusted Gear for Serious Off-Roaders!
Underbody view of Yukon with CAT shield installed.

MillerCat GMC Yukon 2021+ Cat Shield

by MillerCat
SKU GM-001
$420.00

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Why Choose the MillerCat Shield for Your GMC Yukon?

🛡️

A Formidable Physical Barrier

Makes cutting your Yukon's four catalytic converters a loud, difficult, and time-consuming ordeal that thieves will avoid.

🔩

No-Drill, Reversible Fitment

Installs directly onto your vehicle's frame using factory mounting points. No permanent modifications are required.

💨

Maintains Factory Airflow

Strategic louvers and vents ensure proper cooling for your exhaust and transmission, protecting powertrain health.

🇺🇸

Designed & Made in the USA

From initial 3D scan to final production, every shield is proudly engineered and manufactured in California.

🔒

Proprietary Security Hardware

Our included tamper-resistant screws require a special bit (provided), adding a critical layer of defense against thieves.

🌦️

Lifetime Corrosion Resistance

Crafted from high-grade aluminum, the MillerCat shield is built to withstand the elements and will never rust, unlike steel alternatives.

Description

Miller CAT Anti‑Theft Cat Shield – Fits GMC Yukon 2021+ | Your Ultimate Protection

Your GMC Yukon is a premium vehicle, and unfortunately, that makes it a prime target for catalytic converter thieves. The violation of finding your SUV disabled, coupled with the staggering cost and delay of replacing four converters, is a nightmare scenario.

The open undercarriage and high value of the four catalytic converters on your Yukon make it a lucrative prize for thieves. They can get in and out in minutes.

The MillerCat Shield is engineered to stop them in their tracks. By creating an imposing, multi-piece barrier secured with tamper-proof hardware, we eliminate the easy access they rely on. This isn't just a shield; it's a statement that your vehicle is protected by the best, forcing criminals to seek an easier, unprotected target.

Protect your investment and your peace of mind with the MillerCat GMC Yukon 2021+ Cat Shield—the most trusted name in catalytic converter security.

 

Industry Recognized: SEMA Award-Winning Design & Engineering

Key Benefits of the MillerCat Shield System

  • Precision Fit for Maximum Coverage

    How to get the best catalytic converter protection for a 2021+ GMC Yukon? Use a shield designed for it. We use 3D scanning to create a shield that contours perfectly to your Yukon's underbody, providing comprehensive coverage for all four converters without any gaps or weak points for thieves to exploit.

  • Protects Without Compromising Vehicle Health

    A solid, unvented plate can trap dangerous amounts of heat, potentially damaging your transmission and exhaust components. Our shield incorporates carefully designed louvers that mimic the factory heat shield, promoting critical airflow and ensuring your vehicle operates safely within its intended temperature ranges.

  • A Smart, One-Time Investment

    Replacing the four catalytic converters on a modern GMC Yukon can cost upwards of $4,000, not including the potential for collateral damage and a lengthy wait for parts. The MillerCat shield is a proactive, one-time purchase that protects you from these astronomical costs and the severe disruption of having your vehicle out of commission.

 GMC Yukon Catalytic Converter Shield

Technical Specifications

Vehicle Fitment 2021+ GMC Yukon / Yukon XL
Material High-Strength 5052 Aluminum
Hardware Proprietary Tamper-Resistant Screw Kit
Included Tools One (1) Security Screw Driver Bit
Installation 100% Bolt-On (No Drilling Required)
Country of Origin Made in the USA

Frequently Asked Questions

+ Does this shield fit all trim levels, like Denali and AT4?

Yes. Our shield is designed based on the standard GM T1 platform chassis, ensuring compatibility with all 2021 and newer GMC Yukon and Yukon XL models, including Denali and AT4 trims, regardless of the factory suspension or powertrain.
+ Will the installation void my vehicle's warranty?

No. The MillerCat shield is a 100% bolt-on product that requires no drilling, cutting, or permanent modification to your vehicle. It can be removed at any time, returning the vehicle to its factory condition, thereby not affecting your manufacturer's warranty.
+ Can I still access my transfer case for service?

Yes. The shield is designed to protect the catalytic converters and does not obstruct access to the transfer case drain and fill plugs. Routine driveline maintenance can be performed without removing the shield.
+ I lost the special security bit. How can I get another one?

Replacement security bits are available. For security reasons, we require proof of your original purchase (like an order number or receipt) to verify ownership before sending a replacement bit. This ensures only legitimate owners can remove the shield.
+ Is professional installation recommended?

While the shield can be installed by a DIYer with the right tools and a safe way to lift the vehicle, we do recommend professional installation for the best fit and finish. A typical auto shop can usually complete the installation in under an hour.
Prop 65

California Residents

Prop 65 Warning- Product may contain chemicals known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov

Proposition 65 is a California law passed in 1986. Its goals are to protect drinking water sources from toxic substances that may cause cancer and birth defects and to reduce or eliminate exposures to those chemicals generally, for example in consumer products, by requiring warnings in advance of those exposures.

The regulation requires the State of California to revise and republish yearly a list of chemicals known to the State of California to cause cancer or birth defects or other reproductive harm. The current list contains over 900 naturally occurring and synthetic chemicals. This regulation also requires manufacturers to place warnings on products that contain any of the chemicals listed by the State of California. No other states require warnings of this nature, and products with Prop 65 warning language are legal to sell in all states. Detailed information regarding requirements for compliance to the California Prop. 65 is can be found at: www.P65Warning.ca.gov

Why Buy From Us

We get it. You've got a lot of choice when it comes to online retailers.
Here's why we think you should shop with us at ExtrailAuto.

MillerCat GMC Yukon 2021+ Cat Shield

Reviews

Let customers speak for us

from 445 reviews

Great service from their staff. Robert help me through all the process with a request I had, he responded all emails in a timely manner and provided great help.

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Questions? Give us a call today. (409) 916-8280