Used 2021 GMC Sierra 3500HD Denali Specs & Features

Starting MSRP

$66,100

Overview

Gas Engine

Drive Type	four wheel drive
Total Seating	5
Bed length	82.2 in.
Payload Capacity	4,365 lbs.
Towing Capacity	20,000 lbs.
Curb Weight	6,947 lbs.
Basic Warranty	3 yr./ 36,000 mi.
Country of final assembly	United States

Fuel & MPG

Fuel type	Regular unleaded
Range in miles (city/hwy)	0/0 mi.
Fuel tank capacity	36.0 gal.

2021 GMC Sierra 3500HD for sale near you

3 of 10 listings

Denali Diesel
MSRP: $54,000
96 mi away
Denali Diesel Crew Cab
MSRP: $53,990
83 mi away
SLT Crew Cab
MSRP: $37,900
46 mi away

SLE
MSRP: $45,998
In-stock online
Denali Diesel Crew Cab
MSRP: $55,961
In-stock online
Denali Diesel Crew Cab
MSRP: $68,981
22 mi away
SLT Diesel Crew Cab
MSRP: $56,818
68 mi away
SLT Diesel Crew Cab
MSRP: $55,990
83 mi away
Denali Diesel Crew Cab
MSRP: $66,987
19 mi away

See all 10 listings

Engine

Base engine size	6.6 L
Cylinders	V8
Base engine type	Gas

Horsepower	401 hp @ 5,200 rpm
Torque	464 lb-ft @ 4,000 rpm
Valves	16
Cam type	Overhead valves (OHV)
Valve timing	Variable
Direct injection	Standard

Towing & Hauling

Max Towing Capacity	20,000 lbs.
Max Payload Capacity	4,365 lbs.

Drivetrain

Transmission	6-speed shiftable automatic
Drive type	Four wheel drive
On demand 4WD	Standard

Electronic hi-lo gear selection	Standard
Automatic locking hubs	Standard
Rear locking differential	Standard
Descent control	Standard

Incentives

See Offers Near San Antonio, TX

Check out current offers on the GMC Sierra 2500HD

View Offers

GMC.com

Suspension

Front independent suspension	Standard
Stabilizer bar stabilizer bar	Standard

Dimensions

Length	250.1 in.
Overall width without mirrors	81.9 in.
Height	80.9 in.

Wheelbase	158.9 in.
Bed length	82.2 in.
Turning circle	52.7 ft.
Ground clearance	11.2 in.
Curb weight	6,947 lbs.
Maximum towing capacity	20,000 lbs.
Maximum payload	4,365 lbs.
Gross weight	11,350 lbs.
Country of final assembly	United States

Colors

Exterior Colors	Onyx Black Quicksilver Metallic Carbon Black Metallic Hunter Metallic Ebony Twilight Metallic Pacific Blue Metallic White Frost Tricoat Summit White Cayenne Red Tintcoat
Interior Colors	Dark Walnut/Dark Ash Grey, premium leather Jet Black, premium leather

Front Seat Dimensions

Front head room	43.0 in.
Front leg room	44.5 in.
Front shoulder room	66.0 in.

Front hip room	61.2 in.
Premium leather	Standard
Bucket front seats	Standard
8-way power driver seat	Standard
Height adjustable driver seat	Standard
Driver seat with power adjustable lumbar support	Standard
2 memorized driver seat settings	Standard
8-way power passenger seat	Standard
Height adjustable passenger seat	Standard
Passenger seat with power adjustable lumbar support	Standard
Multi-level heated driver seat	Standard
Multi-level heated passenger seat	Standard
Ventilated driver seat	Standard
Ventilated passenger seat	Standard

Rear Seat Dimensions

Rear head room	40.1 in.
Rear leg room	43.4 in.
Rear shoulder room	65.3 in.

Rear hip room	60.2 in.
Split-folding rear seatback	Standard
Folding with storage center armrest	Standard
Multi-level heated	Standard

Safety

Blind spot and lane departure warnings accident avoidance system	Standard
Rear cross traffic alert	Standard
Pre-collision safety system	Standard

Post-collision safety system	Standard
Dual front side-mounted airbags	Standard
Front and rear head airbags	Standard
Passenger airbag occupant sensing deactivation	Standard
Stability control	Standard
Traction control	Standard
Child seat anchors	Standard
Rear door child safety locks	Standard
4-wheel ABS	Standard
Front and rear ventilated disc brakes	Standard
Tire pressure monitoring	Standard
Dusk sensing headlamps	Standard
Auto delay off headlamps	Standard
LED headlamp	Standard
Daytime running lights	Standard
Front fog/driving lights	Standard
Turn signal mirrors	Standard
2 front headrests	Standard
Front height adjustable headrests	Standard
2 rear headrests	Standard
Rear height adjustable headrests	Standard
Rear center 3-point belt	Standard
Engine immobilizer	Standard

Build Your 2025 Sierra 2500HD

At a Glance:

2 Trims
$46,300starting MSRP

Build & Price GMC.com

*The Manufacturer’s Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees, and optional equipment. Dealer sets final price. Click here to see all GMC vehicles’ destination freight charges.

In-Car Entertainment

AM/FM stereo	Standard
Bose premium brand speakers	Standard
7 total speakers	Standard

1 subwoofer(s)	Standard
Android Auto/Apple CarPlay	Standard
USB connection	Standard
Auxiliary audio input and USB with external media control	Standard
Memory card slot	Standard
Satellite radio satellite radio	Standard
Speed sensitive volume control	Standard

Power Feature

4 one-touch power windows	Standard
Hands-free entry	Standard
Reverse tilt dual mirrors provides curb view when vehicle in reverse	Standard

Heated mirrors	Standard

Comfort & Convenience

Keyless ignition	Standard
Tilt and telescopic steering wheel	Standard
Audio and cruise controls on steering wheel	Standard

Power steering	Standard
Front, side, and rear view camera	Standard
Front and rear parking sensors	Standard
Wireless charging	Standard
Cruise control	Standard
Universal remote transmitter (for garage door, security system, etc.)	Standard
Front and rear cupholders	Standard
Front and rear door pockets	Standard
Front seatback storage	Standard
Leather steering wheel	Standard
Heated steering wheel	Standard
Dual zone front climate control	Standard
Rear ventilation ducts	Standard
Sun sensor	Standard
Dual illuminating vanity mirrors	Standard
Electrochromatic inside rearview mirror	Standard
Turn signal in mirrors	Standard

Instrumentation

Trip computer	Standard
Compass	Standard
External temperature display	Standard

Tachometer	Standard
Clock	Standard

Tires & Wheels

Polished alloy wheels	Standard
20 in. wheels	Standard
All terrain tires	Standard

LT275/65R20 tires	Standard
Fullsize non-matching spare tire	Standard
Underbody mounted spare tire	Standard

Telematics

Emergency Service	Standard
Airbag Deployment Notification	Standard
Stolen Vehicle Tracking/Assistance	Standard

Hands-Free Calling	Standard
Roadside Assistance	Standard
Concierge Service	Standard
Destination guidance (also Turn-by-Turn Navigation)	Standard
Destination Download	Standard

Warranty

Basic	3 yr./ 36,000 mi.
Drivetrain	5 yr./ 60,000 mi.
Rust	6 yr./ 100,000 mi.

Roadside assistance	5 yr./ 60,000 mi.
Free maintenance	1 yr./ unlimited mi.

Mechanical Options

Engine Block Heater	+$100
Heavy Duty Front Spring/Camper Package	+$45
Duramax 6.6L Turbo-Diesel V8 Engine	+$9,750

Trailer Tire Pressure Monitor Sensors	+$50
220 Amp Alternator	+$150
Gooseneck Hitch Package	+$295
Trailering Wiring Provisions	+$35
Auxiliary Battery	+$135
Dual Alternators	+$380
Gooseneck/5th Wheel Prep Package	+$545
High Idle Switch	+$200

Packages

Snow Plow Prep/Camper Package	+$300
Denali Ultimate Package	+$1,770
Denali Black Diamond Edition	+$2,990

Technology Package	+$1,475
GMC Protection Package	+$370
Cargo Convenience Package	+$515

Interior Options

Rear Under Seat Storage	+$275
All-Weather Floor Liner	+$210
Lockable Console Vault	+$295

Premium Front Floor Liners	+$130

Exterior Options

GMC MultiPro Tailgate Step Lights	+$200
Body Color Wheel Arch Moldings	+$685
20" Chrome Aluminum Wheels	+$2,995

Bedside Storage Boxes	+$1,250
Auxiliary Trailer Camera	+$595
20" High Gloss Black Aluminum Wheels w/Machined Finish	+$1,995
20" Chrome Aluminum Wheels	+$2,995
MultiPro Audio System by Kicker	+$815
Front License Plate Kit	+$0
Power Glass Sunroof	+$995
20" High Gloss Black Painted Wheels	+$1,995
Tri-fold Soft Tonneau Cover	+$700
Power Retractable Assist Steps	+$1,100
Black Front and Rear Molded Splash Guards	+$190
Cargo Tie-Down Rings	+$105

See Edmunds pricing data

Has Your Car's Value Changed?

Used car values are constantly changing. Edmunds lets you track your vehicle's value over time so you can decide when to sell or trade in.

See pricing history

Buy In-Store Buy Online

Used 2021 GMC Sierra 3500HD Denali - Specs & Features