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Truck Hardware Gatorback 12"x23" Denali Mud Flaps

Part #:
GB1223D
Sale Price
$129.60
$162.00
Free Shipping
In Stock Ships by Tuesday

Additional details

    ⚠️Universal fit - Brackets recommended (Sold Separately)
  • Fits full-size trucks & SUVs
  • Use on rear wheels
  • Heavy-duty rubber, built to last
  • Drilling required for installation
  • Includes (2) 12"x23" flaps (1 driver/1 passenger)
  • Limited lifetime warranty

Gatorback Plate Finishes

Here are the different plate finishines

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

Most Helpful

Nice!
5
Better then any mud flap I have ever purchased!
2020 GMC Denali
5
Second set of gatorback mud flaps. Previous set worked well to keep mud a debris off our RV, so we purchased another set for our new GMC
Rear Mud Flaps
5
Very east to install & look great on my Denali

Most Recent

Nicely sized mud flaps!
5
Love the size and professional style of these flaps. I have GMC on the front and Denali on the rear. With 285-60R20 tires, these flaps provide good width coverage for reducing undercarriage spray and more importantly keep the running boards free of slush! Thx!
Very Nice product
5
I love these Mud Flaps. I have a 2015 GMC Denali 2500HD and pull a camper. These mud flaps keep the tires from trowing rocks and mud on the camper.

Do you have these available for the dually trucks?

- Karen on 5/18/2020

View all questions

Quality Protection for Your Full-Size Truck or SUV

Outfit your truck with the same rugged quality trusted by professionals—the Truck Hardware Gatorback 12"x23" Mud Flaps. Built for full-size trucks and SUVs, these full-length flaps deliver superior coverage and a bold, finished look. Each flap features a die-stamped 304 stainless steel plate for a premium shine and long-lasting durability. Designed for universal fitment on rear wheel wells, they keep your vehicle cleaner and protect against rocks, mud, and road debris.

Key Features

  • Universal Fit for Rear: These Gatorback mud flaps are designed to provide flexibility for truck and SUV owners.
  • Full-Length Design: 12"x23" size provides maximum protection for full-size trucks.
  • Durable Stainless Steel Plate: Featuring a 304 stainless steel plate, these mud flaps have a sleek and durable design that adds a sophisticated touch.
  • Heavy Duty Rubber: Made from premium virgin rubber, these mud flaps are built to withstand rough road conditions while providing long-lasting protection.
  • Simple Installation: Drilling into the wheel well lip ensures a tight, lasting fit. Self-tapping screws are included.
  • Limited Lifetime Warranty: Backed by a limited lifetime warranty, these mud flaps are designed to protect your vehicle for years to come.

Built for Real-World Toughness

Gatorback 12"x23" Mud Flaps deliver uncompromising strength and style. Whether you're hauling, towing, or off-roading, these flaps protect your paint and keep your truck looking sharp. The combination of thick rubber and stainless steel creates a premium, rugged appearance that complements any full-size pickup.

Installation Details

The Gatorback 12"x23" Mud Flaps are easy to install, with a requirement to drill into the lip of the wheel well to ensure a stable and lasting fit. This secure installation provides excellent stability, allowing the mud flaps to withstand harsh driving conditions without shifting or sagging.

Manufacturer Warranty

Gatorback mud flaps are backed by a limited lifetime warranty for the original owner, covering rubber replacement (e.g., tear-offs) throughout the product's life. This warranty does not cover damage caused by misuse, abuse, or normal wear and tear on brackets, plates, or mounting hardware. Rest assured that your mud flaps are designed for durability, and Gatorback stands behind their quality.

Step up your truck’s protection and appearance with the Truck Hardware Gatorback 12"x23" Mud Flaps. Built tough, designed to impress, and backed by a lifetime warranty—because your truck deserves the best.

Brand Gatorback by Truck Hardware
Length 23 inch(es)
Width 12 inch(es)
Height .5 inch(es)
Weight 9 lb(s)
UPC 667511021667

  • 2019 GMC Sierra 2500 HD
  • 2019 GMC Sierra 3500 HD
  • 2018 GMC Sierra 1500
  • 2018 GMC Sierra 2500 HD
  • 2018 GMC Sierra 3500 HD
  • 2017 GMC Sierra 1500
  • 2017 GMC Sierra 2500 HD
  • 2017 GMC Sierra 3500 HD
  • 2016 GMC Sierra 1500
  • 2016 GMC Sierra 2500 HD
  • 2016 GMC Sierra 3500 HD
  • 2015 GMC Sierra 1500
  • 2015 GMC Sierra 2500 HD
  • 2015 GMC Sierra 3500 HD
  • 2014 GMC Sierra 1500
  • 2014 GMC Sierra 2500 HD
  • 2014 GMC Sierra 3500 HD
  • 2013 GMC Sierra 1500
  • 2013 GMC Sierra 2500 HD
  • 2013 GMC Sierra 3500 HD
  • 2012 GMC Sierra 1500
  • 2012 GMC Sierra 2500 HD
  • 2012 GMC Sierra 3500 HD
  • 2011 GMC Sierra 1500
  • 2011 GMC Sierra 2500 HD
  • 2011 GMC Sierra 3500 HD
  • 2010 GMC Sierra 1500
  • 2010 GMC Sierra 2500 HD
  • 2010 GMC Sierra 3500 HD
  • 2009 GMC Sierra 1500
  • 2009 GMC Sierra 2500 HD
  • 2009 GMC Sierra 3500 HD
  • 2008 GMC Sierra 1500
  • 2008 GMC Sierra 2500 HD
  • 2008 GMC Sierra 3500 HD
  • 2007 GMC Sierra 1500
  • 2007 GMC Sierra 2500 HD
  • 2007 GMC Sierra 3500 HD
  • 2006 GMC Sierra 1500
  • 2006 GMC Sierra 2500 HD
  • 2006 GMC Sierra 3500 HD
  • 2005 GMC Sierra 1500
  • 2005 GMC Sierra 2500 HD
  • 2005 GMC Sierra 3500 HD
  • 2004 GMC Sierra 1500
  • 2004 GMC Sierra 2500 HD
  • 2004 GMC Sierra 3500 HD
  • 2003 GMC Sierra 1500
  • 2003 GMC Sierra 2500 HD
  • 2003 GMC Sierra 3500 HD
  • 2002 GMC Sierra 1500
  • 2002 GMC Sierra 2500 HD
  • 2002 GMC Sierra 3500 HD
  • 2001 GMC Sierra 1500
  • 2001 GMC Sierra 2500 HD
  • 2001 GMC Sierra 3500 HD
  • 2000 GMC Sierra 1500
  • 2000 GMC Sierra 2500 HD
  • 2000 GMC Sierra 3500 HD
  • 1999 GMC Sierra 1500
  • 1999 GMC Sierra 2500 HD
  • 1999 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