Truck Hardware Gatorback Duramax Mud Flaps - Set of 4 - Fits 2014-2018 GMC Sierra 1500 & 2015-2019 2500/3500HD

Part #:
GB1223CUTDX-2~GB1223DX-2~GB756802
Sale Price
$361.80
$402.00
Free Shipping
In Stock Ships by Monday

Additional details

    ⚠️Fits single rear wheel trucks
  • Includes (4) 12" wide mud flaps (2 driver/2 pass)
  • Drilling required for installation
  • Front tire coverage - 9" below fender
  • Rear tire coverage - 7.5" below fender
  • Lifetime limited warranty

Gatorback Plate Finishes

Here are the different plate finishines

At a glance

Overall sentiment is strongly positive: buyers consistently describe Gatorback/SharpTruck mud flaps as premium, heavy‑duty, great-looking, and highly effective at stopping rocks/mud/snow from hitting paint, steps, and trailers. The main reservations are the high price and occasional installation/fitment or hardware/packaging issues, which are often mitigated by responsive customer service and strong warranty support.

What Customers Liked

  • Thick, heavy rubber with substantial weight plates; feels “OTR/semi-truck grade,” doesn’t flap at highway speeds, flexible in cold weather, holds up through winters, gravel roads, mud, and years of use; many repeat buyers across multiple trucks.
  • Significantly reduces rock chips, road debris, mud/salt spray on paint, rocker panels, running boards/power steps, cameras, and keeps trailers/5th wheels/RVs cleaner and protected; coverage often better than OEM or plastic splash guards.
  • Looks “sharp,” classy, and truck-specific; logo/plate options (Z71, AT4X, Ford, Ram, Duramax, flags, black/satin/gunmetal/chrome) get compliments and help the truck stand out; finishing caps appreciated.
  • Many report perfect/vehicle-specific fit with factory-hole mounting, adjustable in/out positioning, good clearance with stock tires, and compatibility with certain trims/fender flares when configured correctly.
  • Generally described as straightforward with the right tools; helpful YouTube videos; bracket kits (especially rear/dually) add stability and make alignment easier; ability to install without removing wheels on some vehicles.
  • Frequent praise for fast shipping, responsive support, quick exchanges for wrong parts, replacement parts/plates/flaps shipped rapidly, and hassle-free warranty (including tears/rips or shipping damage).
  • Replaceable plates; removable lower section on some models for off-road clearance; ability to adjust flap stick-out; some like drilling only into plastic liner (not body).

Things to Consider

  • Most common complaint; many call them expensive/overpriced (often $600–$1000+), sometimes compounded by needing separate bracket kits/plates; some say alternatives may be “good enough” for less.
  • Mixed experiences: some installs are quick, others take hours—especially rear/dually, with wheel-well liners, rock rails/steps, or limited access; right-angle drill and/or removing rear wheels often recommended; alignment can be finicky.
  • Paper instructions sometimes vague, lacking steps, inconsistent with videos, or confusing (hardware ID, left/right orientation, templates, washer placement); requests for better labeling, templates, and model-specific videos.
  • Occasional reports of holes not lining up, needing to drill/elongate slots, bend/trim brackets, trim liners/trim pieces, or create homemade brackets; some rubbing with oversized tires/offset wheels; a few cases of poor fit on specific trims/years.
  • Multiple reviewers note drilling is still required (usually into plastic liner or flap), so ‘no-drill’ feels misleading in some kits.
  • Some dislike plastic clips/nut inserts pulling out/stripping, mixed metric/SAE hardware, bolt length issues, flimsy/galvanized or plastic brackets at high price, silver hardware visible (wish black), occasional missing/mismatched hardware or parts.
  • Some flaps/plates arrived scuffed/scratched or boxes damaged; brackets loosening in transit; a few wrong items shipped or missing pieces (spacers/washers/clips), though support often resolves quickly.
  • Some note low ground clearance depending on model/height; concerns about snagging in deep snow, tall grass, or off-road obstacles; some wish flaps were longer/shorter depending on use.
  • Plate finish can streak/stain (e.g., gunmetal), color/gloss differs from expectations, logos not level in a few cases, and some wish flaps came pre-slotted/pre-drilled for easier install.
AI-generated from the text of customer reviews

Most Helpful

Truck jewelry
5
These mudflaps are top-quality heavy duty very nice I’ve received so many compliments on them you would think that it was a nice piece  of jewelry I was wearing I love them and so does everybody else thank you
Bow tie and Duramax
5
Fit and finish were great. Stainless steel fasteners were perfect. I really like the looks of the flaps. Set off the truck and keeps the mud off the factory running boards. No more dirty back of pants legs. I recommend these for full functionality and great looks.
Great mudflaps
5
I really like these mudflaps, they look really good, they are exactly what I was wanting to find!!

Most Recent

Gatorback Flaps On LB7 Duramax
5
Absolutely love the products and their customer service. I tore a couple of my flaps off and they replaced it for free no questions asked.
Front and rear mudflaps
5
So happy with the quality of these mud flaps! This is the 3rd truck I have put them on and with never buy a different brand. They fit and look amazing and are a tough and durable product. Thank you again!

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Truck Hardware Gatorback "Duramax" Logo Mud Flaps - Set

Enhance your GMC Sierra's look and functionality with the premium Truck Hardware Gatorback "Duramax" Logo Mud Flap Set. Specifically designed for 2015-2019 GMC Sierra 2500 HD and 3500 HD (Single Rear Wheel), these mud flaps are engineered to provide a seamless fit and exceptional protection for your truck. Whether on the highway or taking on tough off-road environments, these mud flaps ensure that your vehicle remains safeguarded against dirt, debris, and harsh conditions while adding a distinctive style that represents your Duramax pride.

Crafted from 1/2" thick, heavy-duty virgin rubber, these 12" wide mud flaps offer superior strength and flexibility, ensuring long-lasting durability. Virgin rubber is known for its enhanced resilience compared to recycled alternatives, providing resistance to cracking, fading, and warping even in extreme temperatures or rough environments. The rubber's weight helps keep the flaps securely in place, preventing them from "sailing" while driving at high speeds or in windy conditions. The striking Duramax logo is officially licensed and die-stamped onto a stainless steel plate, finished with a hand-applied vinyl overlay, giving these mud flaps a premium look that stands out.

Truck Hardware's Gatorback series is known for its unparalleled quality in heavy-duty mud flaps. This set includes both front and rear mud flaps, each designed for an exact fit using custom-fit rear support brackets and factory-aligned fasteners. The result is an easy installation process that guarantees stability and a custom look that perfectly complements your GMC Sierra. The front mud flaps provide 9" of tire coverage from the bottom of the fender to the bottom of the flap, while the rear flaps offer 7.5" of tire coverage—ensuring comprehensive protection from rocks, mud, gravel, and other debris that could damage your truck's paint or body.

Key Features

  • Heavy-Duty Virgin Rubber Construction: Made from 1/2" thick premium virgin rubber, these mud flaps offer long-lasting durability and are highly resistant to cracking, fading, and warping. Virgin rubber provides unmatched strength and flexibility, ensuring that your mud flaps maintain their integrity for years to come.
  • Custom-Fit Design: Engineered specifically for 2015-2019 GMC Sierra 2500 HD and 3500 HD models. The set includes custom-fit rear support brackets (GB756802) to ensure added stability and prevent movement during rough driving conditions.
  • Officially Licensed Duramax Logo: The stainless steel plates feature a high-quality, die-stamped Duramax logo with a hand-applied vinyl overlay, adding a bold and professional look to your truck.
  • Complete Tire Coverage: The front mud flaps offer 9" of tire coverage, while the rear provides 7.5". This ensures maximum protection from road debris and environmental damage, preserving the pristine condition of your truck.

Installation

Front Flap Installation: The front mud flaps attach directly to the lip of the wheel well using self-tapping screws, with the option to utilize existing factory fasteners if available. The installation process is straightforward and requires only basic tools for a hassle-free experience. Ensure at least 1/2" of clearance between the tires and the wheel well to accommodate the flap thickness. The front flaps install flush with the wheel well, allowing seamless integration with other accessories like step bars, power boards, or side steps.

Rear Flap Installation: The rear mud flaps are secured using custom-fit rear support brackets and self-tapping screws, holding them tightly against the wheel well to minimize movement and prevent the flaps from flapping into the tires. This secure installation helps maintain the longevity of the mud flaps, even in harsh driving environments.

What's Included

  • (2) Front Mud Flaps - 12" x 23" (GB1223CUTDX-2)
  • (2) Rear Mud Flaps - 12" x 23" (GB1223DX-2)
  • Custom Rear Support Brackets (GB756802)
  • Stainless Steel Self-Tapping Mounting Screws

Care & Maintenance

To maintain the performance and appearance of your Gatorback Mud Flaps:

  • Rubber Flaps: Clean periodically with mild soap and water to remove dirt, grime, and road salt.
  • Stainless Steel Plates: Wipe down with a non-abrasive cleaner to maintain the polished finish.
  • Inspect mounting hardware regularly to ensure it remains secure, especially after off-road use or exposure to harsh weather conditions.

Manufacturer Warranty

Gatorback mud flaps are backed by a limited lifetime warranty. This warranty covers rubber replacement (e.g., tear-offs) for the lifetime of the product for the original owner. It does not cover damage caused by abuse or normal wear and tear on brackets, plates, or mounting hardware.

Terms

  • Virgin Rubber: Rubber that has not been recycled or reprocessed, offering superior durability, flexibility, and resistance to wear compared to recycled rubber.
  • Self-Tapping Screws: Screws designed to drill their own hole as they are driven into materials such as metal or plastic, simplifying the installation process.
  • Die-Stamped: A process where the logo is stamped into the metal plate, ensuring a precise, consistent, and high-quality finish.
  • UV-Resistant: The rubber material is treated to resist damage from ultraviolet (UV) light, preventing cracking or fading over time.

The Truck Hardware Gatorback "Duramax" Logo Mud Flaps are the perfect blend of rugged durability, premium style, and comprehensive protection for your GMC Sierra. With high-quality virgin rubber construction, bold Duramax branding, and extensive coverage, these mud flaps are built to keep your truck looking sharp and performing at its best. Choose Gatorback for unmatched quality and protection, and elevate your truck's style and defense against the elements.

BrandGatorback by Truck Hardware
Length23 inch(es)
Width12 inch(es)
Height.5 inch(es)
Weight23 lb(s)

  • 2019 GMC Sierra 2500 HD
  • 2019 GMC Sierra 3500 HD
  • 2018 GMC Sierra 2500 HD
  • 2018 GMC Sierra 3500 HD
  • 2017 GMC Sierra 2500 HD
  • 2017 GMC Sierra 3500 HD
  • 2016 GMC Sierra 2500 HD
  • 2016 GMC Sierra 3500 HD
  • 2015 GMC Sierra 2500 HD
  • 2015 GMC Sierra 3500 HD

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