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Truck Hardware Gatorback Gunmetal GMC Dually Mud Flaps - Set of 4 Fits 2015-2019 GMC Sierra 3500HD

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Sale Price $657.90 $731.00
You save $73.10 (10%)
ON ORDER — Expected to Ship in 10-14 Days
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Know before you buy

Product essentials and key specifications, organized for a quick review.

Product overview

  • Fits 2015-2019 GMC Sierra 3500 HD (Dually Rear Wheel)
  • Front - 5" tire coverage from fender to bottom of flap
  • Rear - 9.5" tire coverage from fender to bottom of flap
  • Includes 12"x23" cut style front flaps (GM1223CUTG)
  • Includes 21"x24" dually rear flaps (GM2124G)
  • Includes custom fit rear support brackets (GB756991)
  • Officially licensed GMC Black logos
  • 304 stainless steel plates with gunmetal finish
  • Limited lifetime warranty

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Product details

Supporting product information.

Truck Hardware Gatorback Gunmetal "GMC" Dually Mud Flaps - Set

Upgrade your GMC Sierra 3500 HD with the sleek and rugged Truck Hardware Gatorback Gunmetal "GMC" Dually Mud Flaps. Specifically designed for 2015-2019 GMC Sierra 3500 HD (Dually Rear Wheel) models, these mud flaps offer an exceptional blend of durability, protection, and distinctive style. The gunmetal finish on the iconic GMC logo adds a modern, bold look to your truck while ensuring the highest level of functionality.

Constructed from 1/2" thick premium virgin rubber, the Gatorback Gunmetal "GMC" Dually Mud Flaps are engineered for maximum resilience, able to withstand even the toughest road conditions while maintaining their flexibility. Each rear flap weighs 10 pounds, which helps prevent them from 'sailing' or shifting at high speeds, ensuring they stay in place and provide excellent coverage. With 5 inches of tire coverage at the front and 9.5 inches at the rear, these mud flaps are designed to keep rocks, mud, and other road debris from damaging your vehicle.

The officially licensed GMC logo is die-stamped into a 304 stainless steel plate with a hand-applied gunmetal finish, guaranteeing a high-quality, premium appearance. The stainless steel plates measure 10 1/4" x 5" on the front and an impressive 17 1/4" x 5" on the rear, giving your truck an enhanced, robust aesthetic that stands out.

Installation

Front Flap Installation: The front mud flaps fasten directly to the lip of the wheel well using self-tapping screws, and existing factory fasteners can also be used if available. Installation is straightforward and requires only basic tools. Be sure to allow at least 1/2" of clearance between the tire and the wheel well to accommodate the flap's thickness. The front flaps install flush to the wheel well, allowing for seamless integration with accessories like step bars, power boards, or side steps.

Rear Flap Installation: The rear mud flaps come with custom-fit Gatorback dually mounting brackets, which are essential for ensuring a secure and stable fit. These galvanized steel brackets provide a strong mounting point, keeping the heavy-duty flaps firmly in place even under challenging conditions. The rear brackets utilize existing factory holes, eliminating the need for drilling into the truck body, although drilling through the mud flaps themselves is required. This installation method ensures the mud flaps are tightly secured, reducing the risk of flapping into the tires.

Key Features

  • Premium Virgin Rubber: Made from UV-resistant virgin rubber for superior durability, flexibility, and resistance to cracking—ideal for harsh environments.
  • Custom Fit for GMC Sierra 3500 HD: Specifically designed for 2015-2019 dually models, providing tailored coverage for both front and rear tires.
  • Officially Licensed GMC Logo with Gunmetal Finish: Features a stainless steel plate with the GMC logo and a gunmetal overlay, adding a modern, premium touch to your truck.
  • Durable Rear Support Brackets: Galvanized steel brackets ensure a stable and secure installation, keeping the heavy-duty flaps firmly mounted.

What’s Included

  • (2) Front Mud Flaps - 12" x 23" (GM1223CUTG)
  • (2) Rear Mud Flaps - 21" x 24" (GM2124G)
  • Custom Rear Support Brackets (GB756991)
  • Stainless Steel Self-Tapping Mounting Screws

Tire Coverage

  • Front: Provides 5 inches of tire coverage from the bottom of the fender to the bottom of the flap.
  • Rear: Provides 9.5 inches of tire coverage from the bottom of the fender to the bottom of the flap.

Care & Maintenance

To keep your Gatorback Mud Flaps looking and functioning like new, follow these care and maintenance tips:

  • Virgin Rubber: Clean the heavy-duty rubber portion periodically with mild soap and water to remove road grime, salt, and other buildup.
  • Stainless Steel Plate: Wipe down the stainless steel plates with a gunmetal finish to maintain their appearance and prevent corrosion. Use a non-abrasive cleaner for the best results.
  • Inspect the mounting hardware periodically to ensure it remains secure, especially after off-road use or harsh weather conditions.

Terms

  • Virgin Rubber: High-quality rubber that is not recycled, providing superior flexibility, durability, and resistance to cracking.
  • Sailing: A term used to describe the movement of mud flaps due to airflow, causing them to lift or move out of position, especially at high speeds.
  • Self-Tapping Screws: Screws designed to create their own threads as they are driven into a material, ensuring a secure fit.
  • OEM (Original Equipment Manufacturer): Refers to the quality and design standards set by the original manufacturer, ensuring compatibility and high quality.

Warranty Information

The Gatorback Gunmetal "GMC" Logo Mud Flaps come with a limited lifetime warranty on the rubber portion. This warranty covers any tears or damage from regular use to the original owner. It does not cover brackets, plates, or mounting hardware, nor does it cover damages due to abuse.

Truck Hardware Gatorback Gunmetal "GMC" Logo Dually Mud Flaps offer a unique blend of modern style, durability, and protection for your GMC Sierra 3500 HD. Featuring high-quality materials, easy installation, and the bold, officially licensed GMC logo with a gunmetal finish, these mud flaps are a premium upgrade that enhances both the appearance and function of your truck. Choose Gatorback for a lasting solution that keeps your truck protected and looking sharp for years to come.

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Safety & compliance

WARNING: Some products may contain chemicals such as DEHP, which can cause cancer, birth defects or other reproductive harm. For more info go to www.p65warnings.ca.gov