2020 GMC Sierra 3500HD AT4 Features & Specs

Starting MSRP

Engine TypeGas
Transmission6-speed shiftable automatic
Drive TypeFour wheel drive
Total Seating5
Basic Warranty3 yr./ 36000 mi.
Starting MSRP

on demand 4WDyes
automatic locking hubsyes
Transmission6-speed shiftable automatic
Drive typeFour wheel drive
descent controlyes
Rear locking differentialyes
electronic hi-lo gear selectionyes
Fuel & MPG
Starting MSRP

Range in miles (cty/hwy)0/0 mi.
Fuel tank capacity36.0 gal.
Fuel typeRegular unleaded
Starting MSRP

Torque464 lb-ft @ 4000 rpm
Base engine size6.6 l
Horsepower401 hp @ 5200 rpm
Turning circle52.7 ft.
direct injectionyes
Base engine typeGas
Valve timingVariable
Cam typeOverhead valves (ohv)
Starting MSRP

2 rear headrestsyes
4-wheel ABSyes
Rear door child safety locksyes
Turn signal mirrorsyes
daytime running lightsyes
engine immobilizeryes
front fog/driving lightsyes
Rear center 3-point beltyes
post-collision safety systemyes
child seat anchorsyes
dual front side-mounted airbagsyes
front and rear head airbagsyes
stability controlyes
Passenger airbag occupant sensing deactivationyes
Rear height adjustable headrestsyes
Front and rear ventilated disc brakesyes
2 front headrestsyes
dusk sensing headlampsyes
LED headlampyes
auto delay off headlampsyes
tire pressure monitoringyes
traction controlyes
Starting MSRP

AT4 Premium Packageyes
Snow Plow Prep Package w/Dual Alternatorsyes
Cargo Convenience Packageyes
Snow Plow Prep Packageyes
AT4 Preferred Packageyes
Technology Packageyes
In-Car Entertainment
Starting MSRP

memory card slotyes
AM/FM stereoyes
speed sensitive volume controlyes
auxiliary audio input and USB with external media controlyes
satellite radio satellite radioyes
USB connectionyes
6 total speakersyes
Comfort & Convenience
Starting MSRP

Audio and cruise controls on steering wheelyes
front seatback storageyes
cruise controlyes
leather steering wheelyes
keyless ignitionyes
Climate controlyes
turn signal in mirrorsyes
power steeringyes
Dual illuminating vanity mirrorsyes
Sun sensoryes
front and rear cupholdersyes
electrochromatic inside rearview mirroryes
rear view camerayes
tilt and telescopic steering wheelyes
universal remote transmitter (for garage door, security system, etc.)yes
front door pocketsyes
heated steering wheelyes
Power Feature
Starting MSRP

hands-free entryyes
Reverse tilt dual mirrors provides curb view when vehicle in reverseyes
4 one-touch power windowsyes
Heated mirrorsyes
Interior Options
Starting MSRP

Rear Under Seat Storageyes
Lockable Console Vaultyes
Rear Seat Infotainment System w/DVD Playeryes
Starting MSRP

external temperature displayyes
trip computeryes
Front Seats
Starting MSRP

bucket front seatsyes
height adjustable passenger seatyes
multi-level heating driver seatyes
Front leg room44.5 in.
ventilated driver seatyes
ventilated passenger seatyes
Front head room43.0 in.
8 -way power passenger seatyes
height adjustable driver seatyes
multi-level heating passenger seatyes
Driver seat with power adjustable lumbar supportyes
Front shoulder room66.0 in.
8 -way power driver seatyes
Passenger seat with power adjustable lumbar supportyes
Front hip room61.2 in.
Rear Seats
Starting MSRP

Rear head room40.1 in.
Rear hip Room60.2 in.
Rear leg room43.4 in.
Rear shoulder room65.3 in.
rear ventilation ductsyes
folding with storage center armrestyes
Split-folding rear seatbackyes
multi-level heatingyes
Exterior Options
Starting MSRP

Smoked Amber LED Roof Marker Lampsyes
Black Front and Rear Molded Splash Guardsyes
Standard Tailgateyes
20" High Gloss Black Painted Wheelsyes
Tri-fold Soft Tonneau Coveryes
Wheel Locksyes
LT275/65R20 All-Terrain Blackwall Tiresyes
Rubber Bed Matyes
Front License Plate Kityes
6" Rectangular Black Tubular Assist Stepsyes
Power Glass Sunroofyes
Body Color Wheel Arch Moldingsyes
Bed View Camerayes
Black 3" Round Off-Road Assist Stepsyes
20" 6-Spoke Bright Machined Aluminum Wheels w/High Gloss Black Accentsyes
Auxiliary Trailer Camerayes
Starting MSRP

Length250.1 in.
Maximum towing capacity20000 lbs.
Curb weight6947 lbs.
Gross weight11350 lbs.
Ground clearance11.2 in.
Height80.9 in.
Maximum payload4365 lbs.
Wheel base158.9 in.
Width81.9 in.
Starting MSRP

Exterior Colors
  • Onyx Black
  • Brownstone Metallic
  • Pacific Blue Metallic
  • Red Quartz Tintcoat
  • Summit White
  • Dark Sky Metallic
  • Carbon Black Metallic
Interior Colors
  • Jet Black w/Kalahari Accents, leather
Tires & Wheels
Starting MSRP

LT275/70R18 tiresyes
fullsize non-matching spare tireyes
18 in. wheelsyes
All terrain tiresyes
underbody mounted spare tireyes
painted alloy wheelsyes
Starting MSRP

Stabilizer bar stabilizer baryes
front independent suspensionyes
Starting MSRP

Free Maintenance1 yr./ unlimited mi.
Basic3 yr./ 36000 mi.
Drivetrain5 yr./ 60000 mi.
Rust6 yr./ 100000 mi.
Roadside5 yr./ 60000 mi.