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

Part #:
GB1223CUTD~GB1223D~GB756802
Sale Price
$311.20
$389.00
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

Front Flap Installation Video

GMC Mud Flap Set

What you get with the set

Gatorback Plate Finishes

Here are the different plate finishines

At a glance

Overall sentiment is overwhelmingly positive: customers consistently describe Gatorback/SharpTruck mud flaps as premium, heavy-duty, great-looking products that provide excellent protection, with standout customer service and warranty support; the main negatives are high price and occasional installation/hardware/fitment frustrations.

What Customers Liked

  • Thick, heavy rubber with a substantial feel; durable, flexible in cold/snow/ice; doesn’t “sail” at highway speeds; plates/weights feel robust and can be replaced/swapped.
  • Significantly reduces rock chips, mud/salt spray, and slush on rocker panels, running boards/power steps, bumpers, trailers/RVs; many note cleaner sides and less debris noise on gravel roads.
  • Vehicle-specific fit often described as ‘like a glove’/OEM; finishes (chrome, gunmetal, black plates) and logo plates (Z71/AT4X/FX4/Ram/Ford/Chevy, flags, etc.) ‘make the truck pop’ and draw compliments.
  • Many report straightforward installs, especially after the first flap; helpful YouTube videos; slotted holes help leveling; adjustable stick-out; removable lower section appreciated for off-roading/clearance.
  • Fast shipping is frequently praised; responsive support for exchanges/mis-shipments/damaged parts; hassle-free warranty replacements (torn/ripped flaps or scratched plates) often sent quickly.

Things to Consider

  • Most common complaint: ‘pricey/overpriced’ (often $600–$1000 with brackets/plates). Some feel brackets/plates should be included at that price.
  • Installs can be time-consuming or awkward (especially rears/dually setups), sometimes requiring wheel removal, right-angle drill, extra hands, drilling into plastic liners, trimming liners/trim pieces, or drilling/slot-cutting templates.
  • Paper instructions sometimes lacking, confusing, or mismatched vs video; hardware bags not well-separated/labeled; left/right not always marked; templates/printer scaling issues; ‘no-drill’ marketing criticized when drilling plastic is required.
  • Occasional reports of cheap/fragile fasteners, plastic clips/nut inserts pulling out/stripping, mixed metric/SAE heads, silver hardware being visually noticeable, bracket thickness/material concerns (plastic/galvanized vs stainless), and clamp-on brackets potentially rubbing paint (suggest PPF/tape).
  • Some vehicles need hole elongation, bracket bending, or ‘gerry-rigging’; occasional rubbing with oversized tires/offset wheels; a few reports of mis-shipped parts (two rears), wrong plates/colors, missing washers/spacers/clips/screws, or shipping scuffs/scratches/damaged boxes.
AI-generated from the text of customer reviews

Most Helpful

2017 GMC Denali
5
My mudflap set arrived and I was able to install all four in about three hours. Place vehicle on level ground to start. Once lining up and placing two screws to secure flap, I remove the tire to complete installation one at a time. They are a good quality set look great!
Lookin good
5
Had the flaps professionally installed and they fit and look great
Nice!
5
Better then any mud flap I have ever purchased!

Most Recent

Mud flaps
5
Very pleased with the quality and easy installation of these mud flaps. Just newly installed, but so far so good.
Rear Mud Flaps
5
Very east to install & look great on my Denali

Will these mud flaps fit my 2019 Denali?

- J.R. on 10/30/2018

These will fit the 2019 2500 HD and 3500 HD as well as the 1500 Limited Denali. If it is the new body style they will not. Truck Hardware is working getting the custom fit flaps for the new truck finished up.

- Admin on 10/30/2018

Will these mud flaps fit my 2018 Yukon Denali

- Andrew Gooch on 2/6/2021

They will not the Yukon. The wheel well of the Yukon is mostly plastic with the rear bumper. That is not strong enough to supper the weight of the mud flap.

On the front there is not enough clearance between the tire and the inside of the wheel well to allow these flaps to be installed

- Admin on 2/10/2021

Will these mud flaps fit 2023 denali

- Allan vostad on 11/2/2023

This set will not work on the 2023. If you go here, www.sharptruck.com/truck-hardware-logo-mud-flaps put in your vehicles information. There are different sets for the 1500 Denali and the HD Denali

- Admin on 11/6/2023

View all questions

Truck Hardware Gatorback "Denali" Logo Mud Flaps - Set

Add a touch of luxury and rugged protection to your GMC Sierra with the premium Truck Hardware Gatorback "Denali" Logo Mud Flap Set. Specifically crafted for 2014-2018 GMC Sierra 1500, 2019 GMC Sierra 1500 Limited, and 2015-2019 GMC Sierra 2500 HD and 3500 HD (Single Rear Wheel), these mud flaps are designed to provide both exceptional style and high-grade protection for your truck. Whether you're tackling rugged terrains or cruising the highway, these mud flaps keep your vehicle shielded from road debris, preserving its finish while showing off your Denali pride.

Manufactured from 1/2" thick, heavy-duty virgin rubber, these 12" wide mud flaps offer superior durability and flexibility. Virgin rubber is highly resilient, providing better resistance to cracking, fading, and warping compared to recycled alternatives. The weight of these mud flaps ensures they stay securely in place, reducing "sailing" at high speeds or in windy conditions. The flaps are adorned with an officially licensed Denali logo, die-stamped onto a premium stainless steel plate with a hand-applied vinyl overlay, adding a sleek and upscale touch that complements the Denali's luxury styling.

The Truck Hardware Gatorback series is renowned for its industry-leading quality in heavy-duty mud flaps. This set includes both front and rear mud flaps, custom-fit for your GMC Sierra, ensuring an exact fit with the use of custom rear support brackets and factory-aligned fasteners. The front mud flaps provide 5" of tire coverage from the bottom of the fender to the bottom of the flap, while the rear flaps offer 7.5" of coverage—giving your truck comprehensive protection from rocks, mud, gravel, and other road debris that could cause costly damage to your paint or body.

Key Features

  • Heavy-Duty Virgin Rubber Construction: Made from 1/2" thick premium virgin rubber, these mud flaps offer outstanding durability and are highly resistant to cracking, fading, and warping. Virgin rubber provides superior strength and flexibility, ensuring that your mud flaps remain intact and effective for years to come.
  • Custom-Fit Design: Designed specifically for 2014-2019 GMC Sierra models. The set includes custom-fit rear support brackets (GB756802) that add stability and prevent unwanted movement, even in challenging driving conditions.
  • Officially Licensed Denali Logo: The stainless steel plates feature the iconic Denali logo, die-stamped for precision and finished with a hand-applied vinyl overlay. This adds a bold, premium appearance that complements the distinctive styling of your truck.
  • Comprehensive Tire Coverage: The front mud flaps offer 5" of tire coverage, while the rear provide 7.5" of coverage. This ensures superior protection from road debris, helping to maintain the pristine condition of your truck's exterior.

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 use existing factory fasteners if available. Installation is straightforward, requiring only basic tools for a hassle-free experience. Ensure there is 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 integrity of the mud flaps, even in tough driving environments.

What's Included

  • (2) Front Mud Flaps - 12" x 23" (GB1223CUTD)
  • (2) Rear Mud Flaps - 12" x 23" (GB1223D)
  • 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 regularly 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 periodically 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 "Denali" Logo Mud Flaps are the perfect combination of luxury, rugged durability, and effective protection for your GMC Sierra. Featuring premium virgin rubber construction, iconic Denali branding, and comprehensive coverage, these mud flaps are designed to enhance your truck's style while defending it against the elements. Choose Gatorback for unmatched quality and protection, and elevate your truck's look and performance.

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 1500
  • 2018 GMC Sierra 2500 HD
  • 2018 GMC Sierra 3500 HD
  • 2017 GMC Sierra 1500
  • 2017 GMC Sierra 2500 HD
  • 2017 GMC Sierra 3500 HD
  • 2016 GMC Sierra 1500
  • 2016 GMC Sierra 2500 HD
  • 2016 GMC Sierra 3500 HD
  • 2015 GMC Sierra 1500
  • 2015 GMC Sierra 2500 HD
  • 2015 GMC Sierra 3500 HD
  • 2014 GMC Sierra 1500

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