Vehicle Details
Body Style
Truck
Engine
5.3L 8Cyl
Exterior Colour
White
Interior Colour
Black
Transmission
Automatic
Drivetrain
4×4
Stock
26-311A
Fuel Type
Gasoline
Trim Details
Crew Cab Short Box 4-Wheel Drive AT4
Description
2021 GMC Sierra 1500 AT4 4x4 | 5.3L V8 | 10-Speed | Summit White | Crew Cab
Rugged off-road capability meets premium comfort in this 2021 GMC Sierra 1500 AT4 Crew Cab 4x4 Short Box. Finished in striking Summit White with a premium Jet Black leather interior featuring Kalahari accents, this Sierra AT4 is built for Alberta roads, backcountry adventures, and everyday driving with bold styling and proven V8 power.
Key Features
5.3L EcoTec3 V8 Engine (L84) – 355 HP Strong, dependable V8 performance for towing, hauling, and confident everyday driving.
10-Speed Automatic Transmission (MQB) Smooth, responsive shifting designed for better performance, towing control, and highway efficiency.
4-Wheel Drive (4x4) Excellent traction for snow, gravel roads, muddy job sites, and off-road terrain.
AT4 Package (4SB) GMC’s premium off-road trim featuring lifted stance, aggressive styling, skid plates, and enhanced capability.
Perforated Leather Interior with Kalahari Accents (HVD) Exclusive AT4 interior design combining premium comfort with rugged style.
Engine Block Heater (K05) Ideal for reliable starts during cold Alberta winters.
Crew Cab / Short Box Configuration Spacious rear seating with a versatile cargo bed for work or recreation.
Exterior: Summit White (GAZ) Clean, bold finish that perfectly complements the AT4 styling.
Why Buy This Sierra AT4?
The 2021 GMC Sierra 1500 AT4 5.3L offers the perfect combination of off-road capability, premium comfort, and V8 truck performance. Whether you're towing, commuting, or heading off the beaten path, this AT4 is ready for it all.
Perfect For
Truck buyers • Off-road enthusiasts • Winter driving • Towing & hauling • Premium truck shoppers
Packages & Options
Standard Equipment
Technical Specifications
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AM/FM Stereo
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Auxiliary Audio Input
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Bluetooth Connection
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MP3 Player
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Smart Device Integration
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HD Radio
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Requires Subscription
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Satellite Radio
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Audio system feature, 6-speaker system
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Steering Wheel Audio Controls
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WiFi Hotspot
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Aluminum Wheels
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Tires - Front All-Terrain
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Tires - Rear All-Terrain
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Tires - Front All-Season
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Tires - Rear All-Season
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Wheel, 17" x 8" (43.2 cm x 20.3 cm) full-size, steel spare
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Wheelhouse liners, rear
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Bumper, front, body-colour lower (Front bumper colour will be high gloss black.)
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Bumper, rear body-colour with corner steps
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CornerStep, rear bumper
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Grille (Body-colour surround with high gloss Black mesh and Black chrome inserts. With (PCP) AT4 CarbonPro Edition the grille will have a unique grille surround with Black Chrome finish.)
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Daytime Running Lights
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Fog Lamps
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Taillamps, LED signature taillight with LED stop and reverse light
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Lamps, cargo area, cab mounted integrated with centre high mount stop lamp, with switch in bank on left side of steering wheel
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LED Cargo Area Lighting located in cargo box activated with switch on centre switch bank or key fob
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Heated Mirrors
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Mirror Memory
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Power Folding Mirrors
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Power Mirror(s)
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Privacy Glass
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Integrated Tailgate Step
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Tailgate, gate function manual with EZ Lift, includes power lock and release includes hitch area light
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Tailgate and bed rail protection caps, top
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Door handles, body-colour
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Bed Liner
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Cargo tie downs (12), fixed rated at 500 lbs (226.8 kg) per corner
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Bucket Seats
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Leather Seats
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Driver Adjustable Lumbar
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Power Driver Seat
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Passenger Adjustable Lumbar
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Power Passenger Seat
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Heated Front Seat(s)
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Cooled Front Seat(s)
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Rear Bench Seat
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Centre console, floor-mounted with cup holders, cell phone storage, power cord management, hanging file folder capability
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Floor covering, colour-keyed carpeting
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Floor Mats
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Adjustable Steering Wheel
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Steering column, lock control, electrical
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Leather Steering Wheel
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Heated Steering Wheel
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Instrument cluster 6-gauge cluster featuring speedometer, fuel level, engine temperature, tachometer, voltage and oil pressure
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Compass, located in instrument cluster
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Driver Information Centre, 4.2" diagonal colour display includes driver personalization
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In-vehicle Trailering App includes checklist, trailer maintenance reminders, trailer security alerts, trailer mileage, tow/haul reminder and trailer electrical diagnostics
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Power Windows
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Power Door Locks
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Keyless Entry
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Keyless Start
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Remote Engine Start
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Cruise Control
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Mirror Memory
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Seat Memory
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Security System
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Auxiliary Audio Input
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MP3 Player
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Power Outlet
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Power outlet, instrument panel, 120-volt (400 watts shared with (KC9) bed mounted power outlet)
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USB ports, dual, charge-only (2nd row)
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Power outlet, bed mounted, 120-volt (400 watts shared with (KI4) instrument panel mounted power outlet)
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A/C
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Climate Control
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Multi-Zone A/C
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Rear Defrost
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Auto-Dimming Rearview Mirror
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Assist handles, front A-pillar mounted for driver and passenger, rear B-pillar mounted
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GMC Connected Access capable (Subject to terms. See onstar.ca or dealer for details.)
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8 Cylinder Engine
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Gasoline Fuel
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10-Speed A/T
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A/T
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Pickup bed
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GVWR, 7000 lbs. (3175 kg) (Requires Crew Cab model with (L84) 5.3L EcoTec3 V8 engine or (L87) 6.2L EcoTec3 V8 engine.)
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Air filter, heavy-duty
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Automatic Stop/Start (Standard on vehicles built before 6-7-2021. Most vehicles built on or after 6-7-2021 that are equipped with a V8 engine and (MQB) 10-speed automatic transmission will have (NSS) Not Equipped with Automatic Stop/Start, which removes Automatic Stop/Start and its content. See dealer for details.)
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Hill Descent Control
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Locking/Limited Slip Differential
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Transfer case, two-speed, electronic Autotrac with push button control (4WD models only)
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Suspension, Off-Road with 2" factory installed lift and monotube shocks
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Four Wheel Drive
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Cooling, external engine oil cooler (Not available with (LM2) Duramax 3.0L Turbo-Diesel I6 engine.)
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Cooling, auxiliary external transmission oil cooler (Not available with (LM2) Duramax 3.0L Turbo-Diesel I6 engine.)
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Alternator, 170 amps (Included and only available with (L84) 5.3L EcoTec3 V8 engine or (L87) 6.2L EcoTec3 V8 engine. Not available with (LM2) Duramax 3.0L Turbo-Diesel I6 engine.)
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Battery, heavy-duty 730 cold-cranking amps/80 Amp-hr maintenance-free with rundown protection and retained accessory power (Included and only available with (L84) 5.3L EcoTec3 V8 engine, (L3B) 2.7L Turbo engine and (L87) 6.2L EcoTec3 V8 engine.)
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Frame, fully-boxed, hydroformed front section
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Skid Plates
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Trailer brake controller, integrated
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Tow Hooks
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Power Steering
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4-Wheel Disc Brakes
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ABS
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Brake lining wear indicator
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Capless Fuel Fill
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Exhaust, aluminized stainless-steel muffler and tailpipe
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Exhaust, dual with premium tips (With (PCP) AT4 CarbonPro Edition the exhaust tips will be black.)
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Tow Hitch
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ProGrade Trailering System includes (PZ8) Hitch Guidance with Hitch View and (U1D) In-vehicle Trailering App
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Stability Control
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Traction Control
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Daytime Running Lights
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Driver Air Bag
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Front Head Air Bag
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Front Side Air Bag
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Passenger Air Bag
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Passenger Air Bag Sensor
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Rear Head Air Bag
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Requires Subscription
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Telematics
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Back-Up Camera
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Hitch Guidance
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Driver Restriction Features
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Tire Pressure Monitor
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Rear Seat Reminder
No matches were found.
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Vehicle NameGMC Sierra 1500
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Body StyleCrew Cab Pickup
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Body CodeE63
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DrivetrainFour Wheel Drive
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Trans Order CodeMQB
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Trans Type10
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Trans Description Cont.Automatic
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First Gear Ratio (:1)4.69
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Second Gear Ratio (:1)2.98
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Third Gear Ratio (:1)2.15
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Fourth Gear Ratio (:1)1.8
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Fifth Gear Ratio (:1)1.52
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Sixth Gear Ratio (:1)1.28
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Seventh Gear Ratio (:1)1.00
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Eighth Gear Ratio (:1)0.85
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Ninth Gear Ratio (:1)0.69
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Tenth Gear Ratio (:1)0.63
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Reverse Ratio (:1)4.86
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Transfer Case ModelMagna MP3023/4
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Transfer Case Gear Ratio (:1), High1.00
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Transfer Case Gear Ratio (:1), Low2.69
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Passenger Capacity5
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Front Head Room (in)43.03
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Front Leg Room (in)44.53
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Front Shoulder Room (in)66.02
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Front Hip Room (in)61.18
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Second Head Room (in)40.12
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Second Leg Room (in)43.4
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Second Shoulder Room (in)65.16
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Second Hip Room (in)60.24
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Gross Axle Wt Rating - Front (lbs)3800
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Gross Axle Wt Rating - Rear (lbs)3800
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Curb Weight - Front (lbs)2839
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Curb Weight - Rear (lbs)1976
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Gross Vehicle Weight Rating Cap (lbs)7000
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Gross Combined Wt Rating (lbs)15000
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EnerGuide Estimate - City (L/100 km)14.7
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EnerGuide Estimate - Hwy (L/100 km)11.2
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G/km Of CO2 Emissions307
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Dead Weight Hitch - Max Trailer Wt. (lbs)5000
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Dead Weight Hitch - Max Tongue Wt. (lbs)500
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Wt Distributing Hitch - Max Trailer Wt. (lbs)9200
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Wt Distributing Hitch - Max Tongue Wt. (lbs)920
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Fifth Wheel Hitch - Max Trailer Wt. (lbs)7500
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Fifth Wheel Hitch - Max Tongue Wt. (lbs)1875
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Maximum Trailering Capacity (lbs)9200
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Engine TypeGas V8
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Fuel SystemDirect Injection
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Engine Order CodeL84
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Displacement5.3L/325
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SAE Net Horsepower @ RPM355 @ 5600
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SAE Net Torque @ RPM383 @ 4100
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Engine Oil CoolerYes
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Cold Cranking Amps @ 0° F (Primary)730
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Maximum Alternator Capacity (amps)170
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Frame TypeBox Ladder
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Suspension Type - FrontIndependent
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Suspension Type - RearSolid Axle
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Spring Capacity - Front (lbs)3800
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Spring Capacity - Rear (lbs)3850
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Axle Capacity - Front (lbs)3800
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Axle Capacity - Rear (lbs)3800
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Axle Ratio (:1) - Front3.23
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Axle Ratio (:1) - Rear3.23
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Shock Absorber Diameter - Front (mm)50
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Shock Absorber Diameter - Rear (mm)51
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Stabilizer Bar Diameter - Front (in)1.3
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Front Tire Order CodeXCK
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Rear Tire Order CodeXCK
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Spare Tire Order CodeXCQ
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Front Tire Size265/65R18SL
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Rear Tire Size265/65R18SL
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Spare Tire Size265/70R17SL
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Revolutions/Mile @ 45 mph - Front (Rev/Mile)N/A
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Revolutions/Mile @ 45 mph - Rear (Rev/Mile)N/A
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Revolutions/Mile @ 45 mph - Spare (Rev/Mile)N/A
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Front Wheel Size (in)18 x 8.5
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Rear Wheel Size (in)18 x 8.5
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Spare Wheel Size (in)17 x 8
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Front Wheel MaterialAluminum
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Rear Wheel MaterialAluminum
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Spare Wheel MaterialSteel
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Steering TypeElectric Rack & Pinion
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Turning Diameter - Curb to Curb (ft)46.3
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Turning Diameter - Wall to Wall (ft)N/A
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Brake TypePwr
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Brake ABS System4-Wheel
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Disc - FrontYes
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Disc - RearYes
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Front Brake Rotor Diam x Thickness (in)13.5 x 1.18
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Rear Brake Rotor Diam x Thickness (in)13.6 x 0.79
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Fuel Tank Capacity, Approx (L)91
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Wheelbase (in)147.53
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Length, Overall (in)231.72
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Width, Max w/o mirrors (in)81.24
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Height, Overall (in)78.35
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Ground Clearance, Front (in)10.88
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Ground Clearance, Rear (in)10.88
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Cargo Box Length @ Floor (in)69.92
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Cargo Box Width @ Floor (in)71.4
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Cargo Box Width @ Wheelhousings (in)50.63
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Cargo Box (Area) Height (in)22.4
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Tailgate Width (in)71.4
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Cargo Volume (ft³)62.9
No matches were found.
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