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107 photos
Vehicles
›
Make
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GMC
›
Model
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Sierra
2021 GMC Sierra
United States
Diesel
4WD
Pickup
Updated Aug 24, 2026
107 photos
107 photos
Photos
Specifications
Vehicle Details
Powertrain
Engine & Performance
Exterior
Interior
Features
Safety & Security
Other
Vehicle Details
Year
2021
Make
GMC
Model
Sierra
Body Style
Pickup
Generation
4th Generation
Seats
6
Doors
4
Fuel
Diesel
Drivetrain
4WD
Transmission
Automatic, 10-speed
Powertrain
Engine Name
6.6 V8 Duramax 4WD Automatic
Engine Configuration
V
Power (hp)
451 hp
Power (kW)
332 kW
Torque
1,234 Nm (910 lb-ft)
Displacement
6,599 cc
Engine & Performance
Engine
Engine Specification
Rev. at Max Power
2,800 rpm
Rev. at Max Torque
1,600 rpm
Engine Configuration
Engine Configuration
V-Engine
Transmission & Drivetrain
Transmission
Automatic, 10-speed
Fuel
General › Fuel Cap Position
Rear
Left
General
Lockable Fuel Cap
Yes
Brakes
Parking Brake
Electric
Front Brakes
Disc Brakes
Rear Brakes
Disc Brakes
Front Brakes
Cooling
Ventilated
Exterior
Chassis & Body
Chassis
Chassis
Pickup
Pillars
A-C
Chassis Construction
Body-on-Frame
Protective Moldings
Yes
Chassis › Protective Moldings
Wheel Arches
Yes
Interior
Equipment
Instrument Cluster
Trip Computer
Yes
Head-up Display (HUD)
Optional
Speedometer
Analogue
Tachometer
Analogue
Fuel Gauge
Analogue
Voltmeter
Analogue
Features
Comfort Features
Keyless Entry
Optional
Keyless Start
Optional
Remote Engine Start
Optional
Garage Remote Control
Optional
Cruise Control
Optional
Parking Heater
Optional
Cameras
Safety & Security
Seat Belt
Height Adjustable Retractor
Yes
Rear Centre Seat Belt
Yes
Seat Belt Colour
Black
Feature
Driver
Passenger
Rear
Seat Belt Reminder
Other
Car Classification
American Classification
Heavy Duty Pickup Truck
British Classification
Pick-up
Australian Classification
Pickup
European Segment
J-Segment JE-Segment
Car.info Classification
Pickup
Colour
Non-Painted
Doors
Front Doors
Conventional
Rear Doors
Conventional
Door Handles
Pull-up
Equipment
Side Mirrors
Mirror Type
Conventional
User Memory
Optional
Heated
Optional
Turning Signal
Optional
House Colour
Black
Side Mirrors › Mirror Type
Driver side
Optional
Passenger side
Lights
Main Beam
LED
Low Beam
LED
Rear Lights
LED
Daytime Running Light
LED
Fog Lights
Optional
Fog Lights
Spot Light
Optional
Main Beam Assist
Optional
Colour
Door Handles
Non-painted
Rims & Tires
Tire Pressure Monitoring System (TPMS)
Yes
Rim Type
Disc Wheel
Spare Wheel
Full-size (Steel)
Oil Pressure
Analogue
Coolant Temperature
Analogue
Odometer Limit
1,000,000 km/miles
Compass
Optional
Instrument Cluster › Trip Computer
Display
3.5 - 8"
Instrument Cluster › Trip Computer › Display
Shape
Square
Climate Control
Air Condition
Yes
Pollen Filter
Yes
Outside Temperature Indicator
Yes
Controls
Buttons
Rotary Dials
Connectivity
Radio
AM
FM
App-Connect
Android Auto
Apple CarPlay (Wireless)
Bluetooth
Phone
Audio
Cellular Network
Optional
WiFi
Optional
Connectivity › Radio
XM
Optional
HD Radio
Optional
Connectivity › Media Format
Memory Card Reader
Optional
Connectivity › Media Format › Memory Card Reader
SD
Optional
Connectivity › Media Inputs
AUX
Front
USB
USB-A
USB-C
Connectivity › Media Inputs › USB
Placement
Front
Rear
Optional
Connectivity › Cellular Network
5G
Optional
Connectivity › Cellular Network › 5G
4G
Optional
3G
Optional
Displays
Center Display
7 - 8"
Center Display Controls
Touchscreen
Displays › Center Display
Type
Colour
Speakers
Total Number of Speakers
6 - 7 pcs
Subwoofer
Optional
Rear-view Mirror
Adjustments
Mechanical
Interior Storage › Storage Compartments
Glove Compartment
Lockable (Manual)
Armrest Hatch
Front
Under Seats
Optional
Door
Driver Side
Passenger Side
Rear
Interior Storage › Storage Compartments › Under Seats
Rear
Optional
Interior Storage
Cup Holders
Yes
Interior Storage › Cup Holders
Front
2
Rear
2
Interior Storage › Cup Holders › Front
Placement
Middle Console
Interior Storage › Cup Holders › Rear
Placement
Armrest
Lights
Read Light
Front
Guide Light
Entry Guard
Bottom of the Doors
Other Equipment
Make-up Mirror
Driver Side
Passenger Side
Clock
Yes
12V Outlet
Front
Carpets
Optional
Ashtray
Optional
Cigarette Lighter
Optional
Other Equipment › Clock
Digital
Center Display
Other Equipment › 12V Outlet
Rear
Optional
Other Equipment › Carpets
Front
Optional
Rear
Optional
Other Equipment › Ashtray
Front
Optional
Steering Wheel
Multifunction Steering Wheel
Optional
Heated
Optional
Power Steering
Yes
Adjustments
Tilt
Number of Spokes
4
Steering Mechanism
Recirculating Ball
Adjustments
Telescope
Optional
Design
Transmission Knob Material
Plastic
Pedals
Standard
Pedals
Brown
Optional
Seats
Front Seats › Adjustments, Driver
Seat Depth
Yes
Seat Height
Yes
Cushion Tilt
Optional
Backrest Angle
Optional
Lumbar Support
Optional
Headrest, Height
Manual
Front Seats › Adjustments, Passenger
Seat Depth
Optional
Voice Control
Optional
Wireless Phone Charger
Optional
Parking Heater
Cabin Heater
Optional
Parking Heater › Cabin Heater
Engine Heater
Optional
Remote
Optional
Timer
Optional
Cameras
Rear
Optional
Voice Control
Phone
Optional
Wireless Phone Charger
Front
Optional
Other Features
GPS
Optional
GPS Preparation
Optional
Smartphone App
Optional
Horn
Dual Note
GPS
USB
Optional
Accessories
Tool Kit and Jack
Optional
Tire Repair Kit
Optional
Compressor
Optional
Fire Extinguisher
Optional
Warning Triangle
Optional
First Aid Kit
Optional
Trunk Modules
Optional
Bicycle Holder
Optional
Driver
Yes
Passenger
Yes
Rear
-
Belt Pretensioner
Driver
Yes
Passenger
Yes
Rear
-
Belt Load Limiter
Driver
Yes
Passenger
Yes
Rear
Yes
Height Adjustable Retractor
Manual
Yes
Type of Belt
Three-Point-Belt
Front Seats
Outer Rear Seats
Centre Rear Seat
Assist Systems
Electronic Stability Control (ESC)
Yes
Forward Collision Warning (FCW)
Optional
Rear Cross-Traffic Alert (RCTA)
Optional
Lane Assist System
Optional
Hill Descent Control (HDC)
Optional
Trailer Assist
Yes
Trailer Stability Assist (TSA)
Yes
Brake Systems
Autonomous Emergency Brake System (AEB)
Optional
Power Brakes
Yes
Anti-lock Braking System (ABS)
Four-channel
Traction Control System (TCS)
Yes
Electronic Brake Assist (BA/EBA)
Yes
Differential Lock
Electronic
Sensors
Parking Sensors
Optional
Blind Spot Detection (BLIS)
Optional
Parking Sensors
Front
Optional
Rear
Optional
Other Features
Immobiliser
Yes
Anti-theft Alarm
Optional
Central Locking
Remote (Panic Button)
Child Safety Locks
Manual
Immobiliser
Electronic
Yes
Airbags
Feature
Driver
Passenger
Rear
Frontal Airbag
Driver
Yes
Passenger
Yes
Rear
-
Side Chest Airbag
Driver
Child Protection
Isofix
Passenger: -
Rear: Yes
Optional
Windscreen Wipers
Speed Sensing Intermittent
Optional
Intermittent Control
Yes
Windows
Window Lifts, Front
Powered
Window Lifts, Rear
Powered
Heated Windows
Optional
Heat-Insulating Windows
Front
First Row
Second Row
Rear
Safety Glass
Yes
Rear Windows, Sliding
Optional
Windows › Window Lifts, Features
Pinch Protection
Driver
Passenger
One-touch up/down
Driver
Passenger
Rear
Windows › Heated Windows
Rear
Optional
Windows › Safety Glass
Front
Laminated
Side
Tempered
Rear
Tempered
Other Equipment
Sunroof
Optional
Tow Hitch
Stationary
Tow Hook
Front
Antenna
Whip
Windblocker
Optional
Mud Flaps
Optional
Side Steps
Optional
Other Equipment › Sunroof
Sun Blind
Optional
Other Equipment › Sunroof › Sun Blind
Tinted Glass
Optional
Other Equipment › Mud Flaps
Front
Optional
Rear
Optional
Other Equipment › Side Steps
Deployable
Optional
Stationary
Optional
Yes
Seat Height
Yes
Cushion Tilt
Optional
Backrest Angle
Optional
Lumbar Support
Optional
Headrest, Height
Manual
Front Seats
Power Seat, Driver
Optional
Power Seat, Passenger
Optional
Heated Seats
Optional
Armrest
Middle
Ventilated Seats
Optional
Front Seats › Heated Seats
Cushion
Optional
Front Seats › Heated Seats › Cushion
Backrest
Optional
Front Seats › Ventilated Seats
Driver
Optional
Passenger
Optional
Second Seat Row
Armrest
Yes
Collapsible
Manual
Number of Seats
3
Type of Seat
Adult
Second Seat Row › Collapsible
Backrest Release
On Top of Backrest
Split Fold Ratio
60/40
Heated Seats
Optional
Second Seat Row › Headrests
Outer Seats
Height Adjustment
Centre Seat
Yes
Portable Cooling Box
Optional
Yes
Passenger
Yes
Rear
-
Side Head Airbag
Driver
Yes
Passenger
Yes
Rear
-
Side Pelvis Airbag
Driver
Yes
Passenger
Yes
Rear
-
Curtain Airbag
Driver
Yes
Passenger
Yes
Rear
Yes
Airbag cut-off Switch
Driver
-
Passenger
Yes
Rear
-
GMC
284 vehicles
Sierra
Model
14 variants
€67,000
MSRP · EUR
8.9
Body
Pickup
Variant
Sierra Standard
2001–2026
Configuration
Hd Pickup Sierra 3500 Hd Crew Cab
Sierra Pickup Generations
6 of 9
4th Generation
2014–2023
Year
2021
Powertrain
6.6 V8 Duramax 4WD Automatic
Horsepower
451 hp
Drivetrain
4WD
Fuel
Transmission
Automatic, 10-speed
Diesel
Pickup
4WD
Automatic, 10-speed
Diesel
