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Truck Hardware Gatorback AT4 Mud Flaps - Set of 4 - Fits 2020-2026 GMC Sierra 2500/3500HD

Part #:
GCS200K-AT4
Sale Price
$528.00
$660.00
Free Shipping
ON ORDER — Expected to Ship in 10-14 Days

Additional details

    ⚠️Does NOT fit AT4X / Does NOT fit with OEM splash guards
  • Includes (4)12" wide mud flaps (2 driver/2 pass) and installation hardware
  • Installs over OEM protectors
  • Stainless steel upper bracket with 2" kickback
  • Front tire coverage - 8.75" below OEM protector
  • Rear tire coverage - 8.75" below OEM protector
  • Heavy duty premium rubber flaps
  • Lifetime limited warranty

Front Flap Installation Video

Step By Step Install Instructions

Rear Flap Installation Video

Step By Step Install Instructions

GMC Sierra HD Mud Flap Differences

Product Overview

Gatorback Plate Finishes

Here are the different plate finishes

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
Gatorback Mud Flaps
5
I was nervous about the price, but once they arrived, I could easily tell they are a well made quality product.

Do they fit 2021 GMC AT4

- Charlie Dolan on 7/11/2021

They fit the 2500 HD and 3500 HD for the 1500 here is the custom fit set, www.sharptruck.com/2019-gmc-sierra-1500-at4-black-wrap-logo-gatorback-mud-flaps-set

- Admin on 7/14/2021

View all questions

Premium Protection with a Rugged, Stylish Touch

Upgrade your 2020-2026 GMC Sierra 2500 HD & 3500 HD (single rear wheel) with the Truck Hardware Gatorback "AT4" Logo Mud Flaps - Set. These premium mud flaps are designed for truck owners who prioritize protection, durability, and an exclusive look for their vehicle. Featuring the officially licensed AT4 logo on a 304 stainless steel plate, these mud flaps provide exceptional protection while adding a rugged, stylish touch to your GMC Sierra HD. Built to endure the toughest road conditions, Gatorback mud flaps ensure that your truck remains in pristine condition.

High-Quality Materials for Lasting Durability

Made from heavy-duty virgin rubber, the Gatorback "AT4" Logo Mud Flap Set offers unparalleled durability and resilience, effectively shielding your truck from rocks, mud, gravel, and other debris. Each flap measures 12" wide and 1/2" thick, providing substantial coverage for your truck's wheels. The officially licensed AT4 logo is die-stamped onto a 304 stainless steel plate, which is known for its superior corrosion resistance, ensuring that these plates maintain their polished appearance for years to come.

Custom Fit and Effortless Installation

Designed specifically for GMC Sierra models, these mud flaps install seamlessly over the OEM protector and are not compatible with OEM splash guards. The set includes all necessary mounting hardware, including stainless steel upper brackets with a 2" kickback for enhanced stability. The upper brackets are crafted from 304 stainless steel, offering excellent resistance to rust and corrosion while providing solid support. The no-drill installation process utilizes factory mounting points, making it quick and simple to install, while preserving the integrity of your truck's body.

Key Features

  • Heavy-Duty Rubber Construction: 12" wide, 1/2" thick rubber flaps for robust protection against road debris.
  • 304 Stainless Steel Plates with AT4 Logo: Polished stainless steel plates with the official AT4 logo, ensuring rust resistance and a premium look.
  • No-Drill Installation: Utilizes factory mounting points for a straightforward, non-invasive installation.
  • Custom Fit for GMC Sierra: Engineered specifically for 2020-2026 GMC Sierra 2500 HD & 3500 HD (single rear wheel) for a perfect fit.

Front and Rear Tire Coverage

  • Front Tire Coverage: 8.75" of coverage from the bottom of the OEM protector to the bottom of the flap.
  • Rear Tire Coverage: 8.75" of coverage from the bottom of the OEM protector to the bottom of the flap.

Product Care & Maintenance

  • Virgin Rubber: Clean using mild soap and water to maintain flexibility and a like-new appearance. Avoid abrasive materials or harsh chemicals to prevent damage.
  • 304 Stainless Steel Plates: Clean and polish with a stainless steel cleaner to maintain shine and prevent rust. Avoid using abrasive materials that could scratch the surface.

What’s Included

  • 2 - 12" wide Gatorback "AT4" Logo Mud Flaps for the front.
  • 2 - 12" wide Gatorback "AT4" Logo Mud Flaps for the rear.
  • Stainless steel upper brackets with 2" kickback and all mounting hardware.

Warranty Information

Truck Hardware Gatorback "AT4" Logo Mud Flaps are backed by a limited lifetime warranty. This warranty covers the rubber portion of the mud flaps against manufacturer defects for the original owner, including replacement for damages due to normal wear and tear. The warranty does not cover damage resulting from misuse, abuse, or improper installation. To initiate a warranty claim, please provide product photos and proof of purchase.

Terms

  • 304 Stainless Steel: A high-quality, corrosion-resistant stainless steel that offers superior rust resistance and durability compared to regular stainless steel, ensuring your mud flaps maintain their polished look for years.
  • Virgin Rubber: Rubber that has not been recycled or repurposed, retaining its original strength, flexibility, and durability for superior performance.
  • No-Drill Installation: Refers to an installation process that uses existing factory mounting points, eliminating the need for drilling into the vehicle’s body, thus preserving its integrity.

Ensure that your GMC Sierra 2500 HD or 3500 HD is ready for whatever the road throws at it with the Truck Hardware Gatorback "AT4" Logo Mud Flaps - Set. Combining premium materials, hassle-free installation, and an eye-catching design, these mud flaps provide the ultimate in style, protection, and durability for your truck. Choose Gatorback for the perfect combination of form and function.

BrandGatorback by Truck Hardware
Length23 inch(es)
Width12 inch(es)
Height.5 inch(es)
Weight20 lb(s)
UPC667511041320

  • 2026 GMC Sierra 2500 HD
  • 2026 GMC Sierra 3500 HD
  • 2025 GMC Sierra 2500 HD
  • 2025 GMC Sierra 3500 HD
  • 2024 GMC Sierra 2500 HD
  • 2024 GMC Sierra 3500 HD
  • 2023 GMC Sierra 2500 HD
  • 2023 GMC Sierra 3500 HD
  • 2022 GMC Sierra 2500 HD
  • 2022 GMC Sierra 3500 HD
  • 2021 GMC Sierra 2500 HD
  • 2021 GMC Sierra 3500 HD
  • 2020 GMC Sierra 2500 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