Truck Hardware Gatorback AT4 Mud Flaps & Caps - Rear

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Part #: GCR200R-AT4
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Our Guarantee
  • Fits 2020-2024 GMC Sierra 2500 HD & 3500 HD (Single Rear Wheel)
  • Does NOT fit the AT4X submodel
  • Officially licensed AT4 logo on a 304 stainless steel plate
  • Includes (2)12" wide mud flaps (1 driver/1 pass) & 2 finishing caps
  • Remove OEM protector or factory mud guard for install
  • Rear mud flaps install inside the wheel well
  • Rear tire coverage - 10" below fender
  • Heavy duty premium rubber flaps
  • Lifetime limited warranty

Rear Flap Installation Video

Step By Step Install

Gatorback Plate Finishes

Here are the different plate finishines

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This rear pair of AT4 logo Gatorback Mud Flaps set allows for the removal of the factory protector or mud guards that come standard on Sierra HD trucks. Featuring a 1/2" thick rubber flap, these mud flaps are sure to impress while they protect your investment. The rear flaps and caps are more of a standard flap, giving you full tire coverage at 12" wide. The finishing cap has an OEM look and texture for a seemless fit and finish & give you another option to help customize your truck and give it a unique look. The Truck Hardware Gatorback series mud flaps are the industries highest quality heavy duty mud guards! The rugged design and quality finish of these mud flaps make the perfect compliment to your truck.

Installation is made simple featuring no body drilling using factory exisiting fastereners, mounting locations & custom designed finishing caps. If there are not any fasteners the flaps will come with the needed hardware and brackets for solid installation. Installation can done with tools you have at home. The finishing cap has an OEM look and texture for a seemless fit and finish. Using factory existing fasteners and strong 3M automotive grade tape are used to hold everything firmly in place. The rear pair come with the finishing caps and the hardware needed to install the flaps. Once the finishing caps are installed the rear mud flaps will install overtop of the caps inside the wheel well. When installing these flaps there is no drilling into the body of the truck.

The AT4 logo is officially licensed ensuring it looks perfect and is die stamped into the stainless steel plate with a hand applied vinyl overlay. The stainless plate measures 10 1/4" x 5". You will appreciate the attention to detail in these flaps.

Other helpful topics related to the gatorback mud flaps

Manufacturer Warranty-

Gatorback mudflaps are backed by a Limited lifetime warranty. This warranty covers rubber replacement (ex- tear offs) for the lifetime of the product to the original owner. It does not cover damage caused by abuse, or regular wear and tear on brackets, plates, or mounting hardware.

BrandGatorback by Truck Hardware
Length23 inch(es)
Width12 inch(es)
Height.5 inch(es)
Weight10 lb(s)

  • 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
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