Truck Hardware Gatorback Mud Flap Brackets - Dually - 2015-2019 Silverado/Sierra HD

Part #:
GB756991
Sale Price
$158.40
$176.00
Free Shipping
In Stock Ships by Monday

Additional details

  • Dually rear set - includes one left/one right
  • Use with 19-21" dually flaps
  • Rear - 9.5" tire coverage from fender to bottom of flap
  • No drilling into truck body required
  • Drilling through mud flaps is required for installation
  • Galvanized steel construction

Rear Dually Bracket and Flap Installation

Step by Step Instructions

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

Most Helpful

Perfect
5
You have to get these brackets!! Everything fit perfect. The accuracy of this design was awesome. I’m usually disappointed in the alignment, fit and finish of products like this. Not this time! Went together perfect and made installing a snap. Probably 30 minutes installing the first side and 15 on the second side. Easy!
Dually bracket
5
The guys who put my bracket and High Country Mud Flaps on said it was the best and easiest set up they have ever seen.
The installation was fast and easy but sturdy with the heavy duty mats.
I would recommend them to anyone and everyone if they are looking for mud flaps
Makes Dually Installs Easy!
5
These are a godsend if you're installing dually flaps on Chevy/GMC. Once I determined which side these were for (recommend a small DS/PS sticker or marking) it was relatively easy to line up the holes to drill for proper height and configuration. Custom sheet metal cut ensures that no metal is visible from the side or rear once installed, and provides more than adequate stability. Tip of the hat to those who emphasize using these brackets vice "standard" installation on duallys.
A manager responded to this review

Thank you for the feedback. The manufacturer has updated the install instructions to reflect which bracket goes on which side.

Most Recent

Love the mud! Flaps top quality
5
Love their customer service. Very very helpful
Instructions
4
I wish there was a video or better yet maybe instructions that didn’t remind me of ikea

Will they work with a 21 wide by 24 long bowtie gatorback on a 2018 dually ? I purchased the flaps already thru you. Meant to install on my 1987 dually, now want them on my new truck.

- Bruce Roberts on 11/19/2017

These will work on the 2018 dually and the 21 x 24 flaps.

- Admin on 11/19/2017

View all questions

Secure Mounting Solution for Dually Mud Flaps

The Truck Hardware Gatorback Mud Flap Brackets for dually trucks are specifically designed to provide a strong, reliable mounting point for your heavy-duty mud flaps. Each rear set includes one left and one right bracket, engineered to perfectly support Gatorback 19" or 21" dually mud flaps. These brackets are essential for ensuring that your mud flaps stay securely mounted, providing 9.5" of tire coverage from the bottom of the fender to the bottom of the flap. With galvanized steel construction, these brackets are built to withstand the elements and deliver long-lasting durability.

Compatibility Notice

  • Fits 2015-2019 Chevrolet Silverado 3500 HD Dually
  • Fits 2015-2019 GMC Sierra 3500 HD Dually
  • Designed for use with 19"-21" Gatorback dually mud flaps

Heavy-Duty Construction for Lasting Performance

The Gatorback dually mounting brackets are crafted from galvanized steel, making them incredibly durable and capable of supporting the weight of the Gatorback flaps, which weigh over 10 lbs each. By using these brackets, you ensure a secure and level installation of your mud flaps that will last over time, even in tough road conditions. The brackets utilize existing factory holes, eliminating the need for drilling into your truck's body, which helps to maintain the integrity of your vehicle's finish.

Installation Details

Installing the Gatorback dually brackets is straightforward and requires no drilling into the truck body. Drilling through the mud flaps is necessary to attach them securely to the brackets. These brackets are designed to provide a stable, level mounting point that keeps the mud flaps in place, offering superior protection for your vehicle's dually tires and rear body.

Key Features

  • Dually rear set includes one left and one right bracket
  • Designed for use with 19"-21" Gatorback dually mud flaps
  • Provides 9.5" of tire coverage from the bottom of the fender to the flap's end
  • No drilling into truck body required—uses existing factory mounting holes
  • Heavy-duty galvanized steel construction for maximum durability

Truck Hardware's Gatorback Mud Flap Brackets for dually trucks provide the reliable support you need to securely mount your heavy-duty mud flaps. With a design that uses existing factory holes and durable galvanized steel construction, these brackets ensure a professional and long-lasting installation, protecting your truck from road debris while maintaining its rugged appearance. Keep your investment protected and level with Gatorback's custom fit dually mounting brackets.

Brand Gatorback by Truck Hardware
Length 16 inch(es)
Width 4 inch(es)
Height 6 inch(es)
Weight 4 lb(s)
UPC 667511024804

  • 2019 Chevrolet Silverado 3500 HD
  • 2018 Chevrolet Silverado 3500 HD
  • 2017 Chevrolet Silverado 3500 HD
  • 2016 Chevrolet Silverado 3500 HD
  • 2015 Chevrolet Silverado 3500 HD
  • 2019 GMC Sierra 3500 HD
  • 2018 GMC Sierra 3500 HD
  • 2017 GMC Sierra 3500 HD
  • 2016 GMC Sierra 3500 HD
  • 2015 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