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WeatherTech

WeatherTech No-Drill MudFlaps 2020-2026 Sierra 3500HD Dually

WeatherTech No-Drill MudFlaps 2020-2026 Sierra 3500HD Dually

$219.90 USD
$219.90 USD
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Shipping calculated at checkout.

110120-120122

Available to order — typically ships in ~1–2 weeks
  • Free shipping on orders $250+
  • Typically ships in ~1–2 weeks
  • 30-day hassle-free returns
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Key Features

  • Front and rear set: 110120 front pair plus the wide 120122 dually rear pair
  • Covers the GMC Sierra 3500HD dually from 2020 to 2026
  • Shares its front pair with the single-rear-wheel 110120-120120 kit
  • The rear part number is the only difference between the two kits
  • Sierra Denali trim included
  • No-Drill mounting with QuickTurn stainless fasteners

The WeatherTech 110120-120122 is the dual-rear-wheel version of the current Sierra HD set: the same 110120 front, paired with the wide 120122 dually rear.

The rear flap is the whole difference

This kit and the single-wheel 110120-120120 share an identical front pair and carry identical descriptions in most catalogues. Only the rear part number separates them, and it is the one that has to match your axle. A dually rear on a single-wheel truck hangs too wide; a single-wheel rear on a dually leaves the outer tyre uncovered.

Fitment

Fits 2020-2026 GMC Sierra 3500HD with dual rear wheels, Denali included. GMC does not build a factory dually 2500HD, so this is a 3500HD application.

What the set includes

  • 110120 front MudFlap pair
  • 120122 wide dual-rear-wheel rear MudFlap pair
  • QuickTurn fasteners and clips

Each flap is laser-measured to the vehicle's own body contour and mounts to existing factory holes with WeatherTech's QuickTurn stainless fasteners — no drilling into painted metal, no trimming, no wheel removal.

FAQ
How do I tell this from the 110120-120120 kit?

By the rear number. 120122 is the dually rear; 120120 is the single-wheel rear. The fronts are identical.

Does GMC make a dually 2500HD?

No. The dually is a 3500HD configuration.

Can I fit the Chevrolet Silverado version?

No. Sierra and Silverado are separately tooled.

Vehicle Fitment
Years Make Model Submodel
2020–2026 GMC Sierra 3500HD DRW

Specifications
sold as
front and rear set (4 flaps)
mounting
No-Drill, QuickTurn fasteners, existing factory holes
part type
No-Drill DigitalFit MudFlaps
rear axle
dual rear wheel (DRW)
rear component
120122
front component
110120

Shipping & Returns

Free shipping on orders $250+ (standard items). Oversized items ship at calculated rates.

30-day returns with RMA required. 15% restocking fee, buyer pays return shipping. Defective items returned free with full refund.

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