Truck Hardware Gatorback Mud Flap Brackets - 21" Dually - Fits 2007-2014 Silverado/Sierra 3500

Part #:
GB755566
Sale Price
$125.10
$139.00
Free Shipping
ON ORDER — Expected to Ship in 10-14 Days

Additional details

  • Dually Rear Set - Includes One Left/One Right
  • Use With 21" Dually Flaps
  • Drilling Through Mud Flaps Is Required For Installation

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
Mudflaps and brackets
5
I love the look of my mudflaps and brackets they look super sharp on my truck
Excellent Brackets !!!
5
Thank you for the excellent brackets. Perfect fit and great quality!

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Custom-Fit Mounting Brackets for Dually Trucks

Add superior support to your mud flap installation with the Truck Hardware Gatorback 21" Rear Dually Mud Flap Brackets. These brackets are designed specifically to provide secure mounting points inside the rear wheel well for 2007-2014 Chevrolet Silverado 3500 HD and GMC Sierra 3500 HD dually trucks. Featuring a custom-fit design, these brackets offer a stable foundation for Gatorback mud flaps, ensuring reliable protection against road debris and enhancing your vehicle's rugged appearance.

Compatibility Notice

  • Fits 2007-2014 Chevrolet Silverado 3500 HD Dually
  • Fits 2007-2014 GMC Sierra 3500 HD Dually
  • Designed for use with 21" Gatorback dually mud flaps

Material Quality

  • Heavy-Duty Construction: The brackets are built for long-lasting durability and stability, ensuring that your mud flaps stay securely mounted under all driving conditions. Their robust design provides reliable support for Gatorback mud flaps, perfect for tackling tough road environments.

Installation Details

The Truck Hardware Gatorback 21" Rear Dually Mud Flap Brackets are designed to provide a custom fit while retaining the integrity of your vehicle. The installation process requires drilling through the mud flaps to secure them to the brackets, and these brackets also require fastening into the outer fender lip to fully support the rubber mud flap. The design ensures a secure fit for your mud flaps without compromising the truck body. All necessary hardware and fasteners are included for a smooth installation process.

Key Features

  • Custom-fit rear dually mud flap brackets for 2007-2014 Chevrolet Silverado 3500 HD and GMC Sierra 3500 HD Dually
  • Compatible with 21" Gatorback dually mud flaps
  • Heavy-duty construction for enhanced durability and stability
  • Designed to provide mounting points inside the rear wheel well for universal mud flaps
  • Drilling through mud flaps is required for installation

What's Included

  • (2) Rear mounting brackets (1 left, 1 right)
  • All necessary hardware and fasteners

Conclusion

For a stable and long-lasting mud flap installation, the Truck Hardware Gatorback 21" Rear Dually Mud Flap Brackets are an essential addition to your Chevrolet Silverado or GMC Sierra 3500 HD dually truck. With their heavy-duty design and precise fit, these brackets provide reliable support for your mud flaps, ensuring excellent protection from road debris while keeping your truck looking rugged and well-maintained.

Brand Gatorback by Truck Hardware
Length 21 inch(es)
Width 6 inch(es)
Height 4 inch(es)
Weight 6 lb(s)
UPC 667511016526

  • 2014 Chevrolet Silverado 3500 HD
  • 2013 Chevrolet Silverado 3500 HD
  • 2012 Chevrolet Silverado 3500 HD
  • 2011 Chevrolet Silverado 3500 HD
  • 2010 Chevrolet Silverado 3500 HD
  • 2009 Chevrolet Silverado 3500 HD
  • 2008 Chevrolet Silverado 3500 HD
  • 2007 Chevrolet Silverado 3500 HD
  • 2014 GMC Sierra 3500 HD
  • 2013 GMC Sierra 3500 HD
  • 2012 GMC Sierra 3500 HD
  • 2011 GMC Sierra 3500 HD
  • 2010 GMC Sierra 3500 HD
  • 2009 GMC Sierra 3500 HD
  • 2008 GMC Sierra 3500 HD
  • 2007 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