2020 GMC Sierra 3500HD
AT4 4x4 Crew Cab SB SRW

- / -
445 HP


Included Optional Not Available

Green Scores

No Green Scores

NHTSA Crash Test Ratings

No Crash Test Ratings Available


Front Brake Diameter 14.0
Rear Brake Diameter 14.2
4WD HUB Type Pushbutton Hubs
Axle Ratio 3.73
Exterior Dimensions
Length 250.08
Wheelbase 158.9
Height 80.87
Ground Clearance 11.2
Width 81.9
Front Track Width 68.1
Rear Track Width 68.3
Head Room 1st Row 43.0
Head Room 2nd Row/Rear 40.1
Hip Room 1st Row 61.2
Hip Room 2nd Row/Rear 60.2
Shoulder Room 1st Row 66.0
Shoulder Room 2nd Row/Rear 65.3
Leg Room 1st Row 44.5
Leg Room 2nd Row/Rear 43.4
Standard Seating 5
Max Seating 5
Seating Rows 2
Truck Specifications
Bed Length 82.2
Weights and Capacities
Max Payload 4365
Gross Vehicle Weight Rating 11350
Gross Vehicle Weight Range 10001-14000
Curb Weight 6947
Gross Combined Weight Rating 24000
Base Towing Capacity 14500
Tonnage 1
Max Towing Capacity 21300
Fuel Tank Capacity 36.0
Wheels and Tires
Front Wheel Diameter 18.0
Rear Wheel Diameter 18.0
Front Tire Description LT275/70R18E
Rear Tire Description LT275/70R18E
Front Wheel Size 18.0 x 8.0
Rear Wheel Size 18.0 x 8.0
Front Wheel Width 8.0
Rear Wheel Width 8.0
Tire Type All Terrain
Rear Brake Width 1.34
Front Brake Width 1.57
Exterior Dimensions
Turning Circle 52.7
Width without Mirrors 81.9

Installed Equipment

Air Conditioning
Air filtration
Front air conditioning automatic climate control
Front air conditioning zones dual
Rear vents second row
Airbag deactivation occupant sensing passenger
Front airbags dual
Side airbags front
Side curtain airbags front, rear
Side-curtain airbag rollover sensor
Audio System
Antenna type diversity, mast
Auxiliary audio input Bluetooth, USB, iPod/iPhone, jack, memory card slot
Radio AM/FM, HD radio, touch screen display, voice operated
Radio data system
Satellite radio SiriusXM
Speed sensitive volume control
Total speakers 6
ABS 4-wheel
Braking assist
Electronic brakeforce distribution
Electronic parking brake auto off
Front brake type ventilated disc
Power brakes
Rear brake type ventilated disc
Comfort Features
Armrests rear center with cupholders, rear folding
Door trim leather
Floor mat material rubber/vinyl
Floor material carpet
Floor mats front, rear
Heated steering wheel
Steering wheel trim leather
Convenience Features
Assist handle front, rear
Capless fuel filler system
Center console front console with armrest and storage
Cruise control
Cupholders front, rear
Easy entry power driver seat
Memorized settings 2 driver, driver seat, side mirrors
Multi-function remote panic alarm, proximity entry system
One-touch windows 4
Power outlet(s) 115V cargo area, 115V front, 12V front, 12V rear
Power steering variable/speed-proportional
Power windows lockout button
Push-button start
Reading lights front, rear
Rearview mirror auto-dimming
Remote engine start
Retained accessory power
Steering wheel tilt and telescopic
Steering wheel mounted controls audio, cruise control, multi-function, phone, voice control
Storage door pockets, front seatback, under rear seats
Vanity mirrors dual illuminating
4WD selector electronic hi-lo
4WD type part time w/ on demand setting
Locking differential rear
Alternator 170 amps
Auxiliary oil cooler
Battery heavy duty, maintenance-free
Battery rating 720 CCA
Battery saver
Exterior Features
Bumper detail rear step
Door handle color body-color
Exhaust tip color stainless-steel
Fender lip moldings black
Front bumper color body-color
Grille color black, black surround
Hood scoop
Mirror color black
Pickup bed light LED
Pickup bed liner spray-on
Pickup bed type fleetside
Rear bumper color body-color
Skid plate(s) front, rear
Tailgate lift assist, multi-function split-folding, power locking, removable
Tailgate protection cap
Window trim black
In Car Entertainment
Connected in-car apps app marketplace integration
Infotainment GMC Infotainment System
Infotainment screen size 8 in.
Smartphone integration Android Auto, Apple CarPlay
Digital odometer
Driver information system
Engine hour meter
External temperature display
Fuel economy display MPG, range
Gauge oil pressure, tachometer
Instrument cluster screen size 4.2 in.
Multi-function display
Trip odometer
Warnings and reminders coolant temperature warning, lamp failure, low battery, low fuel level, low oil pressure, maintenance due, tire fill alert
Daytime running lights LED
Exterior entry lights approach lamps, puddle lamps
Front fog lights LED
Headlights LED, auto delay off, auto on/off, wiper activated
Taillights LED
Side mirror adjustments power, power folding, power telescoping, reverse gear tilt
Side mirror type spotter mirror, towing
Side mirrors auto-dimming, heated, integrated turn signals
Camera system rearview
Check rear seat reminder
Child safety door locks
Child seat anchors LATCH system
Programmable safety key
Rearview monitor in dash
Emergency locking retractors front
Front seatbelts 3-point
Rear seatbelts 3-point
Seatbelt pretensioners front
Seatbelt warning sensor front
Driver seat heated, ventilated
Driver seat power adjustments height, lumbar, reclining, 10
Front headrests adjustable, 2
Front seat type bucket
Passenger seat heated, ventilated
Passenger seat power adjustments height, lumbar, reclining, 10
Rear headrests adjustable, 3
Rear seat heated
Rear seat folding folds up
Rear seat type 60-40 split bench
Upholstery leather-trimmed
Upholstery accents perforated
2-stage unlocking doors
Anti-theft system alarm, engine immobilizer
Power door locks anti-lockout, auto-locking
Stability and Traction
Hill holder control
Off-road driving assist hill descent
Roll stability control
Stability control
Traction control
Trailer stability control
Front shock type twin-tube gas
Front spring type torsion bars
Front stabilizer bar diameter 35 mm
Front suspension classification independent
Front suspension type upper and lower control arms
Rear shock type twin-tube gas
Rear spring type leaf
Rear suspension classification solid live axle
Rear suspension type multi-leaf
Tuned suspension off-road
Driver assistance app roadside assistance
Electronic messaging assistance voice operated, with read function
Phone voice operated
Satellite communications OnStar, voice guided directions
Smart device app function maintenance status
Wifi hotspot
Wireless data link Bluetooth
Tires and Rims
Spare tire mount location underbody
Spare tire size full-size
Spare wheel type steel
Tire Pressure Monitoring System
Wheels painted aluminum
Towing and Hauling
Auxiliary transmission fluid cooler
Cargo tie downs
Integrated trailer brake controller
Tow hooks front
Tow/Haul mode
Trailer hitch
Trailer wiring 4-pin, 7-pin
Front wipers variable intermittent
Power windows safety reverse
Tinted glass
Window defogger rear

Optional Equipment

Audio System
MultiPro Audio System by Kicker
Convenience Features
Cargo Convenience Package Includes console vault and rear under seat storage. Limited promotion option.
Lockable Console Vault Limited promotion option.
Rear Under-Seat Storage Includes composite storage bin with lockable lid under the rear seat. Limited promotion option.
3.42 Rear Axle Ratio
3.73 Rear Axle Ratio
170 Amp and 220 Amp Dual Alternators
220 Amp Alternator
Auxiliary 730 CCA Battery
California Emissions Override California emissions override (allows a dealer in states that require california emissions - california, connecticut, delaware, maryland, massachusetts, new jersey, new york, oregon, pennsylvania, rhode island or washington to order federal emissions for a vehicle that will be registered in a state that has federal emission requirements). Do not use for vehicles that will be registered in california, connecticut, delaware, maryland, massachusetts, new jersey, new york, oregon, pennsylvania, rhode island or washington. Requires (fe9) federal emissions requirements. Not available in maine or vermont.
California Emissions Requirements
Engine Block Heater
Exhaust Brake
Federal Emissions Override For vehicles ordered by dealers in federal emission states with (yf5) or (ne1) emissions. Not required for vehicles being shipped to california, connecticut, delaware, maine, maryland, massachusetts, new jersey, new york, oregon, pennsylvania, rhode island, vermont or washington.
Federal Emissions Requirements
High Idle Switch
Northeast Emissions Override State-specific (for dealers ordering vehicles in (yf5) or (ne1) emission states - california, connecticut, delaware, maine, maryland, massachusetts, new jersey, new york, oregon, pennsylvania, rhode island, vermont and washington.) allows a california dealer (yf5 emissions) to order (ne1) emissions with (nb9) emissions override code for registration in (ne1) states; or, a connecticut, delaware, maine, maryland, massachusetts, new york, new jersey, oregon, pennsylvania, rhode island, vermont and washington dealer (ne1 emissions) to order (yf5) emissions with (nb9) emissions override code for registration in california.
Northeast Emissions Requirements Includes connecticut, delaware, maine, maryland, massachusetts, new jersey, new york, oregon, pennsylvania, rhode island, vermont and washington state requirements.
Exterior Features
Bedside Storage Boxes Limited promotion option.
Black Tubular Assist Steps Includes 6 in. Rectangular, black tubular assist steps. Limited promotion option.
Body Color Wheel Arch Moldings Limited promotion option.
Brownstone Metallic Paint
Capped Fuel Fill
Carbon Black Metallic Paint
Cargo Tie-Down Rings Includes a set of 4 cargo tie-down rings. Limited promotion option.
Dark Sky Metallic Paint
Front License Plate Bracket Included on orders with ship-to states that require a front license plate.
Front and Rear Black Molded Splash Guards Limited promotion option.
GMC MultiPro Tailgate Insert w/Mounting Tracks Limited promotion option.
Off-Road Assist Steps Includes 3 in. Black round tubular assist steps. Limited promotion option.
Onyx Black Paint
Pacific Blue Metallic Paint
Pickup Box
Red Quartz Tintcoat Paint
Roof Marker Lamps Includes smoked amber roof marker lamps.
Rubber Bed Mat Limited promotion option.
Standard Tailgate
Tri-fold Soft Tonneau Cover Limited promotion option.
Winter Grille Cover
Fleet Free Maintenance Credit This option code provides a credit in lieu of the free oil changes, tire rotations and inspections for one maintenance service during 1st year of ownership. The invoice will detail the applicable credit. The customer will be responsible for all oil changes, tire rotations, and inspections costs for this vehicle.
In Car Entertainment
Rear Seat Infotainment System with DVD Player Includes dvd player, 8.0-inch dual rear headrest screens with sd, usb ports, hdmi inputs, wireless connectivity, remote control, 2 sets of 2-channel wireless infrared headphones, and available companion parental control app. Limited promotion option.
Marketing Package
AT4 Preferred Package Includes gmc infotainment system w/ navigation and 8 in. Diagonal color touch-screen, bose premium sound system (includes 7 speakers w/ subwoofer), wireless charging, universal home remote, led roof marker lamps, and rear sliding power window.
AT4 Premium Package Includes gmc infotainment system w/ navigation and 8 in. Diagonal color touch-screen, bose premium sound system (includes 7 speakers w/ subwoofer), wireless charging, universal home remote, rear sliding power window, front and rear park assist, lane change alert with side blind zone alert, rear cross traffic alert, 20 x 8.5 in. Machined aluminum wheels with high gloss black paint, 6 in. Black rectangular assist steps, led roof marker lamps, and perimeter lighting.
AT4 Premium Package Discount
Driver Alert Package I Includes front and rear park assist, lane change alert with side blind zone alert, rear cross traffic alert, and perimeter lighting.
Driver Alert Package II Includes lane departure warning, automatic emergency braking, forward collision alert, following distance indicator, safety alert seat, and intellibeam automatic high beam headlamps.
Gooseneck / 5th Wheel Package Includes hitch platform with tray to accept trailer ball, gooseneck or 5th wheel hitch, bed mounted 7-pin trailer harness, and bed view camera.
Snow Plow Prep Package Includes 220-amp alternator, increased front gawr, skid plates (transfer case and oil pan), pass through dash grommet hole, and roof emergency light provisions.
Technology Package Includes 8 in. Enhanced driver information center, 15 in. Diagonal head-up display, hd surround vision with two trailer view camera provisions, bed view camera, and rear camera mirror.
Roof and Glass
Power Sunroof
Rear Camera Mirror Includes inside rearview auto-dimming rear camera mirror with full camera display.
Heavy Duty Front Spring Package
Tires and Rims
20 in. 6-Spoke Bright Machined Aluminum Wheels w/High Gloss Black Accents
20 in. High Gloss Black Painted Wheels Limited promotion option.
LT275/65R20 All-Terrain Blackwall Tires
Trailer Tire Pressure Monitor System Includes module and set of 4 sensors.
Wheel Locks Includes a set of 4. Limited promotion option.
Towing and Hauling
Auxiliary Trailer Camera
Bed View Camera Includes camera in the chmsl which shows a view of the cargo bed and two trailer camera provisions.
GVWR of 11350 lbs.
GVWR of 12100 lbs.
Hitch Package Includes gooseneck ball and chain tiedown kit with case. Limited promotion option.
Trailer Wiring Provisions Includes trailer wiring provisions located at the rear of the pickup box attached to the rear frame cross member.
Upfitter Switches Provides 5-30 amp circuits to facilitate installation of aftermarket electrical accessories.

Available Engines

Duramax 6.6L Biodiesel Turbo V8 445hp 910ft. lbs.
Fuel Type Biodiesel
Fuel Quality 0
Max HP 445 at 2800 rpm
Max Torque 910 at 1600 rpm
Oil Capacity 9.5
Max Payload 4185
Bore 4.06
Stroke 3.9
Displacement 6.6
Block Type V
Cylinders 8
Aspiration Turbo
Fuel Induction CRDI
Cam Type OHV
Valves 32
Valve Timing VVT
Compression 16
6.6L V8 401hp 464ft. lbs.
Fuel Type Gasoline
Fuel Quality 87
Max HP 401 at 5200 rpm
Max Torque 464 at 4000 rpm
Oil Capacity 7.6
Max Payload 4365
Bore 4.06
Stroke 3.86
Displacement 6.6
Block Type V
Cylinders 8
Aspiration Naturally Aspirated
Fuel Induction DI
Cam Type OHV
Valves 16
Valve Timing VVT
Compression 10.8

Available Transmissions

Allison 10-Speed Shiftable Automatic
Detail Shiftable Automatic
Gears 10
6-Speed Shiftable Automatic
Detail Shiftable Automatic
Gears 6

No Photos Available

Other 2020 GMC Sierra 3500HD AT4 Styles

All 2020 GMC Sierra 3500HD Trims

Similar Models

All GMC Models