Truck Hardware Gatorback Black Wrap Denali Dually Mud Flaps - Rear Pair - Fits 2020-2026 GMC Sierra 3500HD

Part #:
GCR204R-DW
Sale Price
$493.20
$548.00
Free Shipping
ON ORDER — Expected to Ship in 10-14 Days

Additional details

    ⚠️Does NOT fit with rear dually wheel well liners
  • Includes (2) 21" wide dually flaps (1 driver/1 pass) & brackets
  • Custom fit - No body drilling required for installation
  • Rear - 13.25" tire coverage from fender to bottom of flap
  • Lifetime limited warranty

Gatorback Plate Finishes

Here are the different plate finishes

Rear Flap Installation Video

Step By Step Install

GCR202 and GCR203 Flap Differences

Product Overview

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
Rear mud flaps
5
Good heavy duty rubber but the brackets are very flimsy

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Upgrade your 2020-2026 GMC Sierra 3500 HD dually with the Truck Hardware Gatorback Black Wrap Denali Logo Dually Mud Flaps. This rear set of mud flaps provides exceptional protection for your truck's dual rear wheels while showcasing your pride in the Denali brand. Each mud flap features the officially licensed Denali logo, die-stamped into a black wrap 304 stainless steel plate, giving your truck a bold and refined appearance that complements its upscale design.

Constructed from heavy-duty 1/2" thick virgin rubber, these mud flaps are engineered to handle even the toughest road conditions. They effectively shield your truck from rocks, mud, gravel, and other road debris, keeping your vehicle cleaner and reducing paint damage. The Gatorback Black Wrap Denali Mud Flaps offer both premium protection and an elevated aesthetic, making them a perfect choice for GMC Sierra owners who value performance and style.

Rear Mud Flaps

These rear mud flaps are specifically designed for GMC Sierra 3500 HD dually models, providing comprehensive coverage for your truck's dual rear wheels. Measuring an impressive 21" in width, they deliver extensive protection from road debris, mud, and grime. The black wrap 304 stainless steel plate with the Denali logo measures 17 1/4" x 5", adding a distinctive and luxurious touch to your truck. The use of black wrap 304 stainless steel ensures outstanding rust and corrosion resistance, thanks to its high chromium content which provides excellent durability against the elements, maintaining the polished and bold appearance even under harsh conditions.

The virgin rubber construction ensures remarkable durability, allowing these mud flaps to withstand rough road conditions without compromising performance. The wide design helps minimize "sail" at high speeds, keeping the mud flaps securely in place for optimal protection. Installation is simple and requires no body drilling—each rear flap comes with custom-fit brackets and all necessary hardware for a secure and seamless fit.

Heavy-Duty Design for Lasting Performance

The Gatorback Black Wrap Denali Dually Mud Flaps are engineered for GMC Sierra models owners who demand the best in both protection and style. The virgin rubber construction ensures resilience, while the black wrap 304 stainless steel plate with the Denali logo provides a refined, premium touch with superior corrosion resistance. These mud flaps are designed to endure challenging road conditions while maintaining their sleek and upscale appearance, making them an essential accessory for those who appreciate quality and aesthetics.

Installation

Installing these mud flaps is straightforward and hassle-free. The rear set utilizes factory screws and existing mounting points, eliminating the need for drilling. The custom-fit design ensures compatibility with your truck's existing features, and each flap includes custom-fit brackets and all necessary hardware for a secure and simple installation.

You can easily fit them at home using standard tools. Once installed, these mud flaps integrate seamlessly with your truck’s design, providing both superior protection and a distinctive Denali look.

Key Features

  • Denali Logo: Features black wrap 304 stainless steel plates with a die-stamped Denali logo, adding a bold and refined look while offering superior rust resistance.
  • Enhanced Tire Coverage: Provides 21" of width for increased tire coverage and maximum protection against road debris, ideal for dual rear wheel configurations.
  • Durable Virgin Rubber Construction: Constructed from 1/2" thick virgin rubber to withstand challenging road conditions, reducing wear and tear on your vehicle and ensuring long-lasting performance.
  • Effortless, No-Drill Installation: Uses factory screws and includes custom-fit brackets for a secure and straightforward installation, delivering a premium, hassle-free experience.

Key Terms to Know

  • OEM (Original Equipment Manufacturer): Refers to parts made by the vehicle manufacturer. These mud flaps are designed to fit over the original mud protectors provided by GMC.
  • Sail: When mud flaps move excessively due to wind or speed, potentially reducing their effectiveness. The weight and design of these flaps minimize sail.
  • Black Wrap Stainless Steel: A type of stainless steel with a black wrap finish that provides excellent corrosion resistance and a bold, premium look, ideal for automotive applications.
  • Virgin Rubber: Rubber that has not been recycled or reclaimed, offering superior durability and flexibility compared to recycled rubber.

Tire Coverage:

  • Rear Tire Coverage: 13.25" from the bottom of the fender to the bottom of the flap.

Warranty

The Gatorback Black Wrap Denali Mud Flaps are backed by a limited lifetime warranty. This warranty covers the rubber portion against tear-offs for the lifetime of the product for the original owner. The warranty provides peace of mind, offering a replacement if the rubber flaps come off due to normal wear and tear. However, it does not cover damage resulting from abuse or regular wear on brackets, plates, or mounting hardware.

Product Care & Maintenance

  • Black Wrap 304 Stainless Steel Plates: To maintain the black wrap finish, clean the plates regularly with a soft cloth and a mild detergent cleaner. Avoid abrasive materials or harsh chemicals that could scratch or damage the surface. Rinse thoroughly with clean water and dry with a soft cloth to maintain the polished look. The 304 stainless steel provides excellent rust and corrosion resistance, making it ideal for long-term durability in all weather conditions.
  • Virgin Rubber: Clean the rubber portion using a mild soap and water solution. Avoid harsh chemicals or petroleum-based cleaners, as these can degrade the rubber over time. Rinse thoroughly and allow the mud flaps to air dry for the best results.

For GMC Sierra owners seeking a combination of premium protection and a bold, upscale look, the Truck Hardware Gatorback Black Wrap Denali Logo Dually Mud Flaps are an ideal choice. With enhanced coverage, effortless installation, and a luxurious Denali aesthetic, these rear mud flaps are designed to protect your truck from road debris while adding a refined, premium appearance. Choose Gatorback Black Wrap Denali Mud Flaps for lasting performance and sophisticated style.

Other helpful topics related to the gatorback mud flaps

Brand Gatorback by Truck Hardware
Length 24 inch(es)
Width 21 inch(es)
Height .5 inch(es)
Weight 24 lb(s)
UPC 667511041832

  • 2026 GMC Sierra 3500 HD
  • 2025 GMC Sierra 3500 HD
  • 2024 GMC Sierra 3500 HD
  • 2023 GMC Sierra 3500 HD
  • 2022 GMC Sierra 3500 HD
  • 2021 GMC Sierra 3500 HD
  • 2020 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