2021 GMC Sierra 2500HD Denali

Dealership Vehicle Description
Performance & Specs
Interior
Exterior
Safety

Built for serious work and premium comfort, this 2021 GMC Sierra 2500 Denali is a heavy-duty pickup that brings diesel strength, four-wheel-drive traction, and upscale refinement together in one capable package. Finished in White and offered by Steele Chevrolet Buick GMC in Dartmouth, this used truck is ready for towing, hauling, and long highway runs.

Powered by a Turbocharged Diesel V8 6.6L engine paired with an automatic transmission, this 2021 GMC Sierra 2500 Denali delivers the kind of low-end torque truck owners want for demanding tasks. With 125,000 km on the odometer, it has the proven capability and road presence that make a heavy-duty GMC truck a smart choice for drivers who need real performance.

FEATURES OF THE Sierra 2500 Denali

Signature Denali grille and bold styling
Heavy-duty diesel power for demanding jobs
Four-door crew cab practicality and comfort
Premium truck design with upscale details

TRUCK FEATURES

Strong diesel torque for confident towing
Four-wheel drive for added jobsite traction
Heavy-duty chassis built for hard work
Pickup box ready for cargo duties

ADVANCED SAFETY FEATURES

Four-wheel drive adds control on loose surfaces
Heavy-duty build inspires confidence on highways
Large truck stance supports road visibility
Automatic transmission helps smooth power delivery

PERFORMANCE AND EFFICIENCY

Turbocharged 6.6L diesel V8 performance
Automatic transmission for smooth shifting response
Diesel power suits towing and hauling
Engine block heater for cold starts

COMFORT AND CONVENIENCE

Four full doors ease cabin access
Spacious cabin supports daily work travel
Premium Denali trim adds upscale feel
Comfortable layout for longer driving days

TECHNOLOGY AND CONNECTIVITY

Clear driver information display placement
User-friendly controls within easy reach
Automatic transmission supports relaxed driving experience
Practical cabin design aids everyday use

CARGO SPACE

Pickup box handles tools and gear
Heavy-duty bed suits worksite demands
Cabin offers room for personal items
Four-door layout adds everyday versatility

WHAT OTHER OWNERS LIKE

Strong diesel pulling power under load
Confident four-wheel-drive traction in rough weather
Comfortable cabin for long-distance driving
Denali trim blends luxury and capability

The 2021 GMC Sierra 2500 Denali stands out in the heavy-duty segment for its blend of muscle and refinement. This is the kind of truck that feels at home pulling a trailer, heading to a jobsite, or covering long distances with confidence. The diesel V8 is the main attraction, delivering the kind of output buyers expect from a serious three-quarter-ton pickup.

Its four-wheel-drive system helps this 2021 GMC Sierra 2500 Denali stay composed when road conditions change. From snowy Nova Scotia mornings to gravel roads and muddy work areas, added traction brings confidence where lighter-duty trucks may struggle. The engine block heater is also a valuable feature for Canadian winters, helping with easier cold-weather starts.

Inside, this 2021 GMC Sierra 2500 Denali offers a premium environment that matches its heavy-duty capability. The four-door configuration makes it easy to load passengers and gear, while the Denali trim gives the cabin a more refined atmosphere. It is a truck designed for drivers who want strength on the outside and comfort on the inside.

For buyers shopping for a used heavy-duty diesel truck, this 2021 GMC Sierra 2500 Denali checks key boxes: turbo-diesel power, automatic transmission, four-wheel drive, four full doors, and trusted GMC truck engineering. Whether your priority is towing, hauling, winter traction, or everyday utility, this Sierra 2500 Denali is equipped to handle demanding tasks with confidence and style.

This 2021 GMC Sierra 2500 Denali's VIN is: 1GT49REYXMF197675 .

Air filter
heavy-duty
Air filtration monitoring
Alternator
170 amps (Requires (L8T) 6.6L V8 gas engine.)
Auto-locking rear differential
Battery
heavy-duty 720 cold-cranking amps/80 Amp-hr, maintenance-free with rundown protection and retained accessory power (Included and only available with (L8T) 6.6L V8 gas engine.)
Brake lining wear indicator
Brakes
4-wheel antilock, 4-wheel disc with DURALIFE rotors
Capless Fuel Fill (Requires (L8T) 6.6L gas V8 engine.)
Cooling
auxiliary external transmission oil cooler
Cooling
external engine oil cooler
Four wheel drive
Frame
fully-boxed, hydroformed front section and a fully-boxed stamped rear section
GVWR
10,650 lbs. (4831 kg) (Included and only available with TK20743 model and (L8T) 6.6L V8 gas engine with 18 or 20 wheels or TK20943 and (L8T) 6.6L V8 gas engine with 17 wheels.)
Hill Descent Control
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.)
LPO
Chrome recovery hooks (dealer-installed)
Pickup bed includes bed assist step
Rear axle
3.73 ratio (Requires (L8T) 6.6L V8 gas engine.)
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

4G LTE Wi-Fi Hotspot capable (Terms and limitations apply. See onstar.ca or dealer for details.)
Air conditioning
dual-zone automatic climate control
Air vents
rear
Assist handles front A-pillar mounted for driver and passenger
rear B-pillar mounted
Audio system
Premium GMC Infotainment System with Navigation and 8 diagonal colour touch-screen includes multi-touch display, AM/FM stereo, Bluetooth streaming audio for music and most phones; featuring wireless Android Auto and Apple CarPlay capability for compatible phones, advanced voice recognition, in-vehicle apps, personalized profiles for infotainment and vehicle settings. Includes greater memory. (Includes (PZ8) Hitch Guidance with hitch view.)
Bluetooth for phone
connectivity to vehicle infotainment system
Bose Sound System
premium 7-speaker system with Richbass woofer
Centre console
floor-mounted with cup holders, cell phone storage, power cord management, hanging file folder capability
Compass
located in instrument cluster
Cruise control
steering wheel-mounted
Defogger
rear-window electric
Door locks
power
Driver Information Centre
enhanced, 8 diagonal multicolour digital display includes analogue speedometer and tachometer gauges
Driver memory recalls driver presets for power driver seat and outside mirrors
Exterior Temperature Display
located in radio display
Floor covering
colour-keyed carpeting
Floor mats
carpeted front (Unique premium carpet. Deleted when LPO floor liners are ordered or (BKF) Premium Floor Liners are ordered.)
Floor mats
carpeted rear (Unique premium carpet. Deleted when LPO floor liners are ordered or (BKF) Premium Floor Liners are ordered.)
GMC Connected Access capable (Subject to terms. See onstar.ca or dealer for details.)
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
Radio
HD
Rear Seat Reminder
Remote vehicle starter system
Seat adjuster
driver 10-way power including lumbar
Seat adjuster
passenger 10-way power including lumbar
Seat trim
Forge perforated leather-appointed
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, centre fold out armrest with 2 cupholders, full cab width under-seat storage, (includes child seat top tether anchor) (Rear seat features leather seating surfaces.)
Seating
heated driver and front outboard passenger
Seats
front bucket with centre console
Seats
heated second row outboard seats
Seats
ventilated driver and front passenger
SiriusXM
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 favourites everywhere you go, with the SiriusXM app, online and at home on compatible connected devices. (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.ca 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/ca 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
Universal Home Remote
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, passenger express up/down
Window
power, rear sliding with rear defogger
Windows
power front, drivers express up/down
Windows
power rear, express down
Wireless Charging
Wireless Phone Projection for Apple CarPlay and Android Auto

Assist steps
chromed tubular, 6 rectangular cab length (factory installed) (Not available with (JSE) Denali Black Diamond Edition or (BRS) power-retractable assist steps with LED perimeter lighting.)
Bed Liner
Spray-on, Pickup bedliner with GMC logo (does not include spray-on liner on tailgate due to Black composite inner panel) (Denali logo replaces GMC logo.)
Bed Step
Black integrated on forward portion of bed on driver and passenger side
Bumper
front, body-colour lower
Bumper
rear body-colour with bumper CornerSteps
Cargo tie downs (12)
fixed rated at 500 lbs (226.8 kg) per corner
CornerStep
rear bumper
Door handles
chrome
Fog lamps
LED
Glass
deep-tinted
Grille (Signature Denali grille with high gloss Black mesh and Chrome inserts.)
Headlamps
LED reflector (high intensity) with LED turn signals and LED signature Daytime Running Lamps
IntelliBeam
automatic high beam on/off
Lamps
cargo area cab mounted integrated with centre high mount stop lamp, with switch in bank on left side of steering wheel
Lamps
Smoked Amber roof marker, (LED)
LED Cargo Area Lighting located in cargo bed activated with switch on centre switch bank or key fob
LPO
Polished exhaust tip (dealer installed) (Requires (L8T) 6.6L V8 gas engine. Not included with (L5P) Duramax 6.6L Turbo-Diesel V8 engine.)
Mirror caps
chrome
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])
Mouldings
beltline, stainless steel
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
LT275/65R20 all-terrain, blackwall
Wheelhouse liners
rear
Wheels
20 (50.8 cm) multi-dimensional Polished aluminum

Airbags
Dual-stage frontal airbags for driver and front outboard passenger; Seat-mounted side-impact airbags for driver and front outboard passenger; Head-curtain airbags for front and rear outboard seating positions; Includes front outboard Passenger Sensing System for frontal outboard passenger airbag
Automatic Emergency Braking
Bed View Camera camera in the CHMSL to show a view of the cargo bed
display located in infotainment screen, includes Two Trailer Camera Provisions
Daytime Running Lamps
LED signature lighting
Following Distance Indicator
Forward Collision Alert
Front and Rear Park Assist
ultrasonic
HD Surround Vision with Two Trailer View Camera Provisions provides the driver with an overhead view of the scene around the vehicle on a centre stack display
Hitch Guidance dynamic single line to aid in truck trailer alignment for hitching
Hitch Guidance with Hitch View with image adjustment
Pan/Zoom/Tilt
Lane Change Alert with Side Blind Zone Alert
Lane Departure Warning
OnStar and GMC connected services capable (Terms and limitations apply. See onstar.ca or dealer for details.)
Rear Cross Traffic Alert
Safety Alert Seat
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 behaviour. 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)