EXTERIOR

Due to current supply-chain shortages, certain features shown have limited or late availability, or are no longer available. See the window label or a dealer regarding the features on an individual vehicle.

ASSERT YOUR DOMINANCE

Engineered for the bold, the monstrous exterior of the Sierra Heavy Duty was built big so you can tow big.

TRAILERING MIRRORS

TRAILERING MIRRORS

All Sierra Heavy Duty models are equipped with trailering mirrors. Also offered are:

  • Available trailering mirrors that power fold or manually extend and retract, LED rear guidance lamps that help enhance your views when backing up with a trailer, lower convex mirrors, as well as amber auxiliary clearance lamps
  • Available features of the power-adjustable trailering mirrors include:
    • Heated and auto-dimming upper glass (driver and passenger)
    • LED turn-signal indicators/clearance lamps
    • LED perimeter lighting
    • LED forward auxiliary task lighting  
SIDE BED STEP

SIDE BED STEP

The Side Bed Step conveniently located just in front of the rear wheel arches complements the large CornerStep rear bumper to help provide easy access when grabbing equipment from the cargo bed.

DUAL PATH AIR INDUCTION SYSTEM

DUAL PATH AIR INDUCTION SYSTEM

The Dual Path Air Induction System on the available 6.6L Duramax® Turbo-Diesel V8 engine draws dense, cool air through both the hood scoop and the large front grille to provide cooler induction air temperatures to help optimize horsepower and trailering performance.

ADVANCED LIGHTING

ADVANCED LIGHTING

All Sierra Heavy Duty models are equipped with LED daytime running lamps, halogen taillamps and wheel molding amber arch lamps over each wheel. Also available are:

  • Standard LED headlamps (high-intensity on Denali, AT4 and SLT)
  • Available fog lamps
  • Available LED fog lamps on SLE (standard on Denali, AT4 and SLT)
  • Available LED cargo bed lighting on SLE (standard on Denali, AT4 and SLT)
  • Available roof marker lamps on SRW (standard on DRW and Denali)  

WORLD’S FIRST

SIX-FUNCTION MULTIPRO TAILGATE

The available GMC MultiPro Tailgate offers six distinct functions designed to help improve loading, unloading and accessing the cargo box.

PRIMARY GATE

PRIMARY GATE

Open the primary gate using the key fob’s power release from inside the truck or from the button on the gate. These same buttons can be used to lock the gate once closed.

PRIMARY GATE LOAD STOP

PRIMARY GATE LOAD STOP

With the primary gate open, the load stop can help prevent items from sliding out of the bed.

EASY ACCESS

EASY ACCESS

The inner gate folds down for easy access when loading and unloading the bed.

FULL-WIDTH STEP

FULL-WIDTH STEP

After removing the conventional hitch, the inner gate folds into a large step for easy entry and exit from the bed (step holds up to 375 lbs.).

INNER GATE LOAD STOP

INNER GATE LOAD STOP

The inner gate also includes a load stop to help prevent second-tier items from sliding out of the bed. The inner gate can be disabled to prevent it from being opened when a hitch or other equipment is installed.

INNER GATE WITH WORK SURFACE

INNER GATE WITH WORK SURFACE

The opened inner gate provides a work surface as well as second-tier loading.

PREMIUM DENALI FEATURES

STANDARD CHROME VERTICAL FRONT RECOVERY HOOKS

POWER ASSIST STEPS

DUAL PATH AIR INDUCTION SYSTEM WITH 6.6L DURAMAX® TURBO-DIESEL V8 ENGINE

STANDARD 20" MULTI-DIMENSIONAL POLISHED ALUMINUM WHEELS

Single Rear Wheel model shown.

SIX-FUNCTION MULTIPRO TAILGATE WITH AVAILABLE ACCESSORY MULTIPRO AUDIO SYSTEM BY KICKER®† 

EXTERIOR THAT CONQUERS

The Sierra HD AT4 off-road pickup truck pairs powerful performance with a bold, athletic look, delivered by way of distinctive finishes and modern, precise detailing.

AVAILABLE AT4 HIGH CLEARANCE STEP

EXCLUSIVE EXTERIOR STYLINGS

VERTICAL RED RECOVERY HOOKS

CARGO BED INNOVATIONS

BEST-IN-CLASS HEAVY-DUTY CARGO BED VOLUME

  • Roll-formed high-strength steel bed
  • Best-in-class Heavy-duty cargo box volume
  • Standard Bed: 69.5 cu.-ft.
  • Long Bed: 83.5 cu.-ft.
  • 12 cargo tie-downs (500-lb. rating per corner)
  • LED Lighting
  • Available durable spray-on bedliner

CORNERSTEP REAR BUMPER

In both corners of the rear bumper, large footwells, lined with an anti-slip texture and sized for large boots, help make access to the cargo bed seamless. Standard on all Sierra Heavy Duty models.

SIERRA HD WHEELS

Each 2023 GMC Sierra Heavy Duty model comes equipped with an impressive set of standard or available head-turning wheels.

2500 & 3500 WHEELS

17" Painted Steel, Silver

17" Machined Aluminum

18" 8-Spoke Painted Steel,
Silver Extended

18" Machined Aluminum Wheels
with Dark Grey Metallic Accents

20" Machined Aluminum Wheels with Bright Silver Accents

20" Machined Aluminum Wheels with High-Gloss Black Accents

20" Multi-Dimensional Polished Aluminum

20" High-Gloss Black Painted Aluminum Wheels

3500 DUAL REAR WHEELS

17" Painted Steel

17" Painted Steel with Chrome Overlay

17" Forged Polished Aluminum

SIERRA HD

ACCESSORY WHEELS

20" Machined Aluminum Bolt Pattern with High-Gloss Black Accents — Dealer Installed

20" High-Gloss Black Painted — Dealer Installed

20" High-Gloss Black Aluminum Wheels with Machined Accents — Dealer Installed

20" Multi-Dimensional Chrome Aluminum Wheels — Dealer Installed

20" Chrome Aluminum — Dealer Installed

Due to current supply-chain shortages, certain features shown have limited or late availability, or are no longer available. See the window label or a dealer regarding the features on an individual vehicle.

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