Truck Hardware Gatorback Stainless Plate Dually Mud Flaps - Set of 4 - Fits 2015-2019 Silverado/Sierra 3500HD

Part #:
GB1223CUTSS~GB2124SS~GB756991
Sale Price
$470.70
$523.00
Free Shipping
In Stock Ships by Monday

Additional details

  • Fits 2015-2019 Silverado/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 (GB1223CUTSS)
  • Includes 21"x24" dually rear flaps (GB2124SS)
  • Includes custom fit rear support brackets (GB756991)
  • 304 Stainless Steel Plate
  • Limited lifetime warranty

Front Flap Installation Video

Installing the flap in a front wheel well

Rear Dually Bracket and Flap Installation

Step by Step Instructions

Dually Mud Flap Set

What you get with the set

Gatorback Plate Finishes

Here are the different plate finishes

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

Perfect
5
You have to get these brackets!! Everything fit perfect. The accuracy of this design was awesome. I’m usually disappointed in the alignment, fit and finish of products like this. Not this time! Went together perfect and made installing a snap. Probably 30 minutes installing the first side and 15 on the second side. Easy!
GMC mud flaps
5
they are great quality and look great!  
Dually bracket
5
The guys who put my bracket and High Country Mud Flaps on said it was the best and easiest set up they have ever seen.
The installation was fast and easy but sturdy with the heavy duty mats.
I would recommend them to anyone and everyone if they are looking for mud flaps

Most Recent

Front flaps 16 f-350
5
These are by far the best flaps on the market. My brother bought a set for his 20 f-350 and loved them. I didn't look anywhere else. Easy to install and look great. Next is stainless for my running boards!
Love the mud! Flaps top quality
5
Love their customer service. Very very helpful

Is any dully mud flaps available for the 2020 GMC dully yet.

- Ted Eby on 1/28/2020

There is not. The GMC dually is being worked on, but there is not an ETA on release yet

- Admin on 1/28/2020

View all questions

Truck Hardware Gatorback Stainless Plate Dually Mud Flaps - Set

The Truck Hardware Gatorback Stainless Plate Dually Mud Flaps are the perfect blend of rugged protection and premium styling for your Chevy Silverado or GMC Sierra 3500 HD. Specifically designed for 2015-2019 Chevy Silverado 3500 HD and GMC Sierra 3500 HD (Dually Rear Wheel) models, these mud flaps provide excellent defense against road debris while enhancing the appearance of your truck with their classic stainless steel plate finish. Combining precision engineering with high-quality materials, these mud flaps are a must-have for truck owners seeking performance and style.

Constructed from heavy-duty virgin rubber, the Gatorback Stainless Plate Dually Mud Flaps are designed to endure tough conditions while maintaining flexibility and resilience. Each rear flap weighs 10 pounds, ensuring they stay securely in place without 'sailing' or shifting, even at highway speeds. These mud flaps offer extensive tire coverage—5 inches for the front and 9.5 inches for the rear—providing maximum protection against rocks, mud, and other road debris that can damage your truck's finish. The stainless steel plate adds a striking visual element, giving your truck a clean and polished look.

These mud flaps are engineered not only for their protective qualities but also to elevate the visual appeal of your truck. The stainless steel plates are designed to withstand harsh environments, providing a durable finish that will last for years while retaining their premium appearance.

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 only requires 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 include 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 securely 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. The rear plates, which measure 17 1/4" x 5", provide a bold and distinctive visual enhancement to your truck.

Key Features

  • Premium Virgin Rubber: Crafted from UV-resistant virgin rubber for superior durability, flexibility, and resistance to cracking—ideal for harsh environments.
  • Custom Fit for Silverado & Sierra 3500 HD: Designed specifically for 2015-2019 Chevy Silverado and GMC Sierra 3500 HD dually models, offering tailored coverage for both front and rear tires.
  • 304 Stainless Steel Plates: High-grade stainless steel plates add a sleek, polished look while offering additional protection against wear and tear.
  • Durable Rear Support Brackets: Galvanized steel brackets provide a stable and secure installation, keeping the heavy-duty flaps firmly mounted.

What’s Included

  • (2) Front Mud Flaps - 12" x 23" (GB1223CUTSS)
  • (2) Rear Mud Flaps - 21" x 24" (GB2124SS)
  • 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.
  • 304 Stainless Steel: Wipe down the stainless steel plates to maintain their shine 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.
  • 304 Stainless Steel: A high-grade stainless steel known for its excellent corrosion resistance and durability.
  • 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 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 Stainless Plate Dually Mud Flaps provide the perfect combination of rugged durability and polished style for your Chevy Silverado or GMC Sierra 3500 HD. Featuring premium materials, straightforward installation, and an iconic stainless steel design, these mud flaps are the ultimate addition for truck owners looking to protect their vehicle while enhancing its aesthetic appeal. Choose Gatorback for a high-quality upgrade that adds both form and function to your truck, ensuring it stays protected and looking great for years to come.

Package Fits These Trucks-

  • 2015 Chevrolet Silverado 3500 HD (Dually Rear Wheel)
  • 2016 Chevrolet Silverado 3500 HD (Dually Rear Wheel)
  • 2017 Chevrolet Silverado 3500 HD (Dually Rear Wheel)
  • 2018 Chevrolet Silverado 3500 HD (Dually Rear Wheel)
  • 2019 Chevrolet Silverado 3500 HD (Dually Rear Wheel)
  • 2015 GMC Sierra 3500 HD (Dually Rear Wheel)
  • 2016 GMC Sierra 3500 HD (Dually Rear Wheel)
  • 2017 GMC Sierra 3500 HD (Dually Rear Wheel)
  • 2018 GMC Sierra 3500 HD (Dually Rear Wheel)
  • 2019 GMC Sierra 3500 HD (Dually Rear Wheel)

BrandGatorback by Truck Hardware
Length24 inch(es)
Width21 inch(es)
Height.5 inch(es)
Weight35 lb(s)

  • 2019 Chevrolet Silverado 3500 HD
  • 2018 Chevrolet Silverado 3500 HD
  • 2017 Chevrolet Silverado 3500 HD
  • 2016 Chevrolet Silverado 3500 HD
  • 2015 Chevrolet Silverado 3500 HD
  • 2019 GMC Sierra 3500 HD
  • 2018 GMC Sierra 3500 HD
  • 2017 GMC Sierra 3500 HD
  • 2016 GMC Sierra 3500 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