2021 GMC Sierra 3500HD AT4

4-Wheel Disc Brakes

Aluminum Wheels

Tires - Front All-Terrain

Tires - Rear All-Terrain

Conventional Spare Tire

Bed Liner

Daytime Running Lights

Fog Lamps

Heated Mirrors

Power Mirror(s)

Integrated Turn Signal Mirrors

Power Folding Mirrors

Privacy Glass

AM/FM Stereo

MP3 Player

Bluetooth Connection

Auxiliary Audio Input

Smart Device Integration

Satellite Radio

Requires Subscription

Satellite Radio

Requires Subscription

HD Radio

Bluetooth Connection

Bluetooth Connection

Smart Device Integration

Bucket Seats

WiFi Hotspot

Leather Seats

Power Driver Seat

Driver Adjustable Lumbar

Power Passenger Seat

Passenger Adjustable Lumbar

Pass-Through Rear Seat

Rear Bench Seat

Heated Front Seat(s)

Heated Front Seat(s)

Cooled Front Seat(s)

Heated Rear Seat(s)

Mirror Memory

Seat Memory

Floor Mats

Floor Mats

Leather Steering Wheel

Heated Steering Wheel

Adjustable Steering Wheel

Steering Wheel Audio Controls

Power Windows

Power Windows

Power Door Locks

Remote Engine Start

Keyless Entry

Power Door Locks

Keyless Start

Cruise Control

Security System

Power Outlet

MP3 Player

Auxiliary Audio Input

MP3 Player

Auxiliary Audio Input

Power Outlet

Climate Control

Multi-Zone A/C

A/C

Rear Defrost

Auto-Dimming Rearview Mirror

Traction Control

Stability Control

Daytime Running Lights

Driver Air Bag

Passenger Air Bag

Front Side Air Bag

Front Head Air Bag

Rear Head Air Bag

Passenger Air Bag Sensor

Telematics

Requires Subscription

Back-Up Camera

Back-Up Camera

Driver Restriction Features

Tire Pressure Monitor

Compass, located in instrument cluster

Cruise control, steering wheel-mounted

Defogger, rear-window electric

Door locks, power

Driver Information Center, 4.2" diagonal color display includes driver personalization

Driver memory, recalls driver "presets" for power driver seat and outside mirrors

Exterior Temperature Display located in radio display

Floor covering, color-keyed carpeting

GMC Connected Access capable (Subject to terms. See onstar.com or dealer for details.)

HD Radio

In-vehicle Trailering App, System includes checklist, trailer maintenance reminders, trailer security alerts, trailer mileage, tow/haul reminder, trailer electrical diagnostics and Trailer Tire Pressure Monitor System module (Includes trailer tire pressure monitoring alert ONLY when (PTT) trailer tire pressure monitor system is factory ordered and sensors are installed.)

Instrument cluster, 6-gauge cluster featuring speedometer, fuel level, engine temperature, tachometer, voltage and oil pressure

Keyless Open and Start

Mirror, inside rearview auto-dimming

Power outlet, bed mounted, 120-volt (400 watts shared with (KI4) instrument panel mounted power outlet)

Power outlet, front auxiliary, 12-volt

Power outlet, instrument panel, 120-volt (400 watts shared with (KC9) bed mounted power outlet)

Power outlet, rear auxiliary, 12-volt

Premium Floor Liners with removable carpet insert, front

Premium Floor Liners with removable carpet insert, rear

Remote vehicle starter system

Seat adjuster, driver 10-way power including lumbar

Seat adjuster, passenger 10-way power including lumbar

Seat trim, Perforated Front Leather seating surfaces

Seat, Up-level Rear with Storage Package, 60/40 folding bench for Crew Cab models includes full-length bench seat, seatback storage on left and right side, center fold out armrest with 2 cupholders, full cab width underseat storage, (includes child seat top tether anchor)

Seating, heated driver and front outboard passenger

Seats, front bucket with center console

Seats, heated second row outboard seats

Seats, ventilated driver and front passenger

SiriusXM Radio

SiriusXM with 360L Equipped with SiriusXM with 360L. Enjoy a trial subscription of the All Access package for the full 360L experience, with a greater variety of SiriusXM content, a more personalized experience and easier navigation. With the All Access package, you can also enjoy your favorites everywhere you go, with the SiriusXM app, online and at home on compatible connected devices. (IMPORTANT: The SiriusXM radio trial package is not provided on vehicles that are ordered for Fleet Daily Rental ("FDR") use. If you decide to continue service after your trial, the subscription plan you choose will automatically renew thereafter and you will be charged according to your chosen payment method at then-current rates. Fees and taxes apply. See the SiriusXM Customer Agreement at www.siriusxm.com for complete terms and how to cancel. All fees, content, features, and availability are subject to change. GM connected vehicle services vary by vehicle model and require active service plan, working electrical system, cell reception and GPS signal. See onstar.com for details and limitations.)

Steering column, lock control, electrical

Steering column, manual Tilt-Wheel and telescoping

Steering wheel audio controls

Steering wheel, heated

Steering wheel, leather-wrapped

Theft-deterrent system, unauthorized entry

USB Ports (Inside Console with bucket seats), 2 also includes 1 SD card reader and auxiliary jack

USB ports, 2 (first row) located on instrument panel

USB ports, dual, charge-only (2nd row)

Window, power front, drivers express up/down

Window, power front, passenger express up/down

Windows, power rear, express down

Wireless Phone Projection for Apple Carplay and Android Auto

Glass, deep-tinted

Grille, Painted Black surround with high gloss Black mesh and Black chrome inserts

Headlamps, LED reflector (high intensity) with LED turn signals and LED signature Daytime Running Lamps

Lamps, cargo area, cab mounted integrated with center high mount stop lamp, with switch in bank on left side of steering wheel

LED Cargo Area Lighting located in cargo bed activated with switch on center switch bank or key fob

Mirror caps, high gloss Black

Mirrors, outside power-adjustable vertical trailering with heated and auto-dimming upper glass, (driver and passenger) lower convex mirrors, turn signal indicators, puddle lamps, perimeter lighting, auxiliary lighting, power folding/extending (extends 3.31" [84.25mm])

Moldings, beltline, Black

Single Rear Wheels

Tailgate and bed rail protection caps, top

Tailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area light

Tailgate, GMC MultiPro Tailgate with six functional load/access features

Taillamps, LED signature taillight with LED stop and reverse light

Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door

Tire, spare LT275/70R18 all-terrain, blackwall

Tires, LT275/70R18E all-terrain, blackwall

Wheelhouse liners, rear

Wheels, 18" (45.7 cm) machined aluminum wheel with Dark Grey metallic accents

Cooling, auxiliary external transmission oil cooler

Cooling, external engine oil cooler

Engine, 6.6L V8 with Direct Injection and Variable Valve Timing, gasoline (401 hp [299 kW] @ 5200 rpm, 464 lb-ft of torque [629 N-m] @ 4000 rpm)

Four wheel drive

Frame, fully-boxed, hydroformed front section and a fully-boxed stamped rear section

GVWR, 11,350 lbs. (5148 kg) with single rear wheels (Included and only available with TK30743 model and (L8T) 6.6L V8 gas engine. Requires single rear wheels.)

Pickup bed includes bed assist step

Rear axle, 3.73 ratio (Requires (L8T) 6.6L V8 gas engine.)

Recovery hooks, Red

Skid Plates protect the oil pan, front axle and transfer case

Steering, Digital Variable Steering Assist This system automatically adjusts steering based on speed, road conditions, and other inputs to reduce driver effort and fatigue

Suspension, Off-Road includes twin-tube shocks

Trailer brake controller, integrated

Transfer case, two-speed active electronic Autotrac with push button control

Transmission, 6-speed automatic, heavy-duty

StabiliTrak, stability control system with Proactive Roll Avoidance and traction control includes electronic trailer sway control and hill start assist

Teen Driver a configurable feature that lets you activate customizable vehicle settings associated with a key fob, to help encourage safe driving behavior. It can limit certain available vehicle features, and it prevents certain safety systems from being turned off. An in-vehicle report card gives you information on driving habits and helps you to continue to coach your new driver

Tire Pressure Monitoring System with Tire Fill Alert (does not apply to spare tire)