GMC Sierra 3500HD Video:

Enter zip code to receive a FREE Quote on GMC Sierra 3500HD

2021 GMC Sierra 3500HD 4WD Crew Cab 159" SLT

4WD Crew Cab 159" SLT

Change Trim 

Price Info

Price with options: $57,400

MSRP: $57,400

Base Invoice: $53,726

Body Style

Crew Cab Pickup - Standard Bed

MPG

City: 0 - Hwy: 0

Select a color
GMC Sierra 3500HD 4WD Crew Cab 159" SLT
Select an image to view:

Quick Search

Choose Your GMC Sierra 3500HD 4WD Crew Cab 159" SLT Options

Price With Options:

$57,400

2021 GMC Sierra 3500HD Pros

The GMC Sierra HD has been completely redesigned for the 2020 model year. The new Sierra HD is bigger and more capable than the truck it replaces while also having a host of new technology to make living with and doing work with the truck, easier than ever before. At the same time, GMC crunched the numbers and found that more than half of their customers are opting for the upscale Denali edition of the Sierra HD. In accordance with those findings, they have made the new 2020 Sierra HD a more comfortable place to spend time in, with a well thought out interior, nicer materials and plenty of space for its occupants.

2021 GMC Sierra 3500HD Model Highlights

The Sierra HD comes in one of several different body styles with long and short bed options. However, despite this complexity there are only two available engines, both V8 units displacing 6.6 liters. The gasoline option is paired to a 6-speed automatic and makes 401 horsepower and 464 lb-ft of torque. The more expensive diesel engine is aided by a turbocharger and makes 445 horsepower and a massive 910 lb-ft of torque. Unlike the gasoline engine, the diesel is mated to a 10-speed automatic to handle all that torque. When properly equipped, a Sierra HD 3500 should be able to tow up to 35,000lbs with a 5th wheel attachment, or 20,000 lbs with a traditional trailer hitch, thanks in large part to the massive torque produced by its diesel V8. Sierra HD models are available with either rear-wheel drive of selectable four-wheel drive.

The Sierra HD comes in either 2500 form or 3500 form with 3500 versions offering a bit more towing capacity and payload because they can be optioned with a "dually" setup, giving the truck an extra pair of wheels on the rear axle. Both trucks can be optioned with a regular cab, a double cab featuring four conventional doors, or a crew cab with even bigger rear seats. Truck beds are either 6'9" or 8' depending on configuration, though the only restriction to bed size is in the regular cab version, which always comes with the longer bed.

In addition to copious options for the basic architecture of the truck, Sierra buyers are also offered plenty of choices when it comes to the tech in their new vehicle. GMC's ProGrade Trailering system features fifteen camera views to help keep an eye on things behind the truck, even counting a class exclusive transparent trailer view among its features. The available heads up display on the Sierra HD is massive, measuring 15-inches across, while the rear-view mirror can be switched between displaying an actual mirror and the view from the rearward facing camera. GM claims their MultiPro tailgate is the world's first six-function tailgate. In practice that means it's easy to load things into and out of the back of the truck, while also providing a ton of utility options for carrying loads with the tailgate dropped. It also has a built-in step to make it easier to climb in and out of the bed of the truck.

New for 2020 are the 4AT versions of the Sierra HD. Concentrating on off-roading capabilities, 4AT models come standard with four-wheel drive along with a more off-road biased suspension setup that includes Rancho Shocks. Other standard features on the 4AT include skid plates, an Eaton locking differential, Michelin all-terrain tires, a heads-up display, GMC's HD Surround Vision2 camera system, hill descent control and an offroad mode.

Most buyers though, will probably opt for the Denali version of the Sierra HD. Available in both 2500 and 3500 forms, Denali versions of the Sierra HD come standard with the bigger crew cab, body colored front and rear bumpers, LED lights in the cargo bed, tinted glass, LED headlights, daytime running, front fog and taillights, powered external mirrors, a MultiPro tailgate, UltraSonic front and rear parking sensors, Lane Departure Warning, Lane Change Alert with Automatic Braking, Rear Cross-Traffic Alert, Following Distance Indicator and Hill Descent Control (HDC). Interior features include 10-way power front seats, 4G LTE Wi-Fi, Bluetooth and Apple CarPlay\Android Auto connectivity, an 8-inch infotainment screen and an 8-inch digital instrument cluster, an 8 speaker Richbass sound system, dual-zone climate control, heated front and rear seats, vented front seats, a heated steering wheel, keyless start and wireless device charging.

2021 GMC Sierra 3500HD Model News

The GMC Sierra HD competes with the RAM 2500 and 3500 as well as the Ford F-250 and F-350. The Sierra costs a bit more than its competitors, but it comes with a bigger and more powerful engine than the Ford, while the Dodge is significantly cheaper for the stripped down "Tradesman" trim level. In addition to its robustness, the Sierra comes with a ton of tech to make trailering easier, including an available camera system that utilizes no fewer than fifteen cameras. Meanwhile, those who want all that functionality with a good dose of comfort, will find no better truck than the upscale Denali versions of the Sierra HD.

2021 GMC Sierra 3500HD Value Writeup

Towing capacity; interior space; well thought out technology; available off-road equipment; powerful engine options; upscale Denali edition

Brakes
Brake ABS System 4-Wheel
Brake ABS System (Second Line)  
Brake Type Pwr
Disc - Front (Yes or ) Yes
Disc - Rear (Yes or ) Yes
Drum - Rear (Yes or )  
Front Brake Rotor Diam x Thickness (in) 14 x 1.6
Rear Brake Rotor Diam x Thickness (in) 14.1 x 1.3
Rear Drum Diam x Width (in)  
Cooling System
Total Cooling System Capacity (qts) - TBD -
Electrical
Cold Cranking Amps @ 0? F (2nd) 730
Cold Cranking Amps @ 0? F (Primary) 730
Maximum Alternator Capacity (amps) 220
Maximum Alternator Watts  
Engine
Displacement 6.6L/- TBD -
Engine Oil Cooler Yes
Engine Order Code L8T
Engine Type Turbocharged Diesel V8
Fuel System Direct Injection
SAE Net Horsepower @ RPM 445 @ 2800
SAE Net Torque @ RPM 910 @ 1600
Mileage
EPA Fuel Economy Est - City (MPG)  
EPA Fuel Economy Est - Hwy (MPG)  
Fuel Economy Est-Combined (N/A)  
Suspension
Axle Capacity - Front (lbs) - TBD -
Axle Capacity - Rear (lbs) - TBD -
Axle Ratio (:1) - Front 3.73
Axle Ratio (:1) - Rear 3.73
Axle Type - Front Independent
Axle Type - Rear - TBD -
Shock Absorber Diameter - Front (mm) 51
Shock Absorber Diameter - Rear (mm) 51
Spring Capacity - Front (lbs) - TBD -
Spring Capacity - Rear (lbs) - TBD -
Stabilizer Bar Diameter - Front (in) 1.38
Stabilizer Bar Diameter - Rear (in)  
Suspension Type - Front Short/Long Arm w/Torsion Bars
Suspension Type - Rear 3-Stage Multi-Leaf
Transmission
Clutch Size (in)  
Drivetrain Four Wheel Drive
Eighth Gear Ratio (:1) 0.85
Fifth Gear Ratio (:1) 1.48
First Gear Ratio (:1) 4.54
Fourth Gear Ratio (:1) 1.72
Ninth Gear Ratio (:1) 0.69
Reverse Ratio (:1) 4.54
Second Gear Ratio (:1) 2.87
Seventh Gear Ratio (:1) 1.00
Sixth Gear Ratio (:1) 1.26
Tenth Gear Ratio (:1) 0.63
Third Gear Ratio (:1) 2.06
Trans Description Cont. Automatic
Trans Description Cont. Again  
Trans Order Code MYD
Trans Power Take Off Yes
Trans PTO Access - TBD -
Trans Type 6
Transfer Case Gear Ratio (:1), High - TBD -
Transfer Case Gear Ratio (:1), Low - TBD -
Transfer Case Model - TBD -
Transfer Case Power Take Off  
Weight Information
Curb Weight - Front (lbs) 3851
Curb Weight - Rear (lbs) 2915
Gross Axle Wt Rating - Front (lbs) 6000
Gross Axle Wt Rating - Rear (lbs) 7250
Gross Combined Wt Rating (lbs) 40000
Gross Vehicle Weight Rating Cap (lbs) 12100
ENTERTAINMENT
Audio system feature, 6-speaker system
Audio system, Premium GMC Infotainment System with 8" diagonal color 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 (PZ8) Hitch Guidance with hitch view.)
Bluetooth for phone connectivity to vehicle infotainment system
HD Radio
SiriusXM Radio
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 favorites everywhere you go, with the SiriusXM app, online and at home on compatible connected devices. (IMPORTANT: The SiriusXM radio trial package is not provided on vehicles that are ordered for Fleet Daily Rental ("FDR") use. 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.com 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 for details and limitations.)
Wireless Phone Projection for Apple CarPlay and Android Auto
EXTERIOR
Bed Step, Black integrated on forward portion of bed on driver and passenger side (Not available with (ZW9) pickup bed delete.)
Bumper, front chrome lower
Bumper, rear chrome with bumper CornerSteps
Cargo tie downs (12), fixed, rated at 500 lbs per corner
CornerStep, rear bumper
Door handles, chrome
Fog lamps, LED
Glass, deep-tinted
Grille, Chrome surround with high gloss Black mesh and Chrome inserts
Headlamps, LED reflector (high intensity) with LED turn signals and LED signature Daytime Running Lamps
Lamps, cargo area, cab mounted integrated with center high mount stop lamp, with switch in bank on left side of steering wheel
LED Cargo Area Lighting located in cargo bed activated with switch on center switch bank or key fob
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])
Moldings, beltline, stainless steel
Single Rear Wheels
Tailgate and bed rail protection caps, top (Deleted with (ZW9) pickup bed delete.)
Tailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area light (Deleted with (ZW9) pickup bed delete.)
Tailgate, GMC MultiPro Tailgate with six functional load/access features (Deleted with (ZW9) pickup bed delete.)
Taillamps, LED signature taillight with LED stop and reverse light
Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door (Deleted with (ZW9) pickup bed delete.)
Tire, spare LT275/70R18 all-terrain, blackwall (Included and only available with (QF6) LT275/70R18E all-terrain, blackwall tires or (QF9) LT275/65R20 all-terrain, blackwall tires with (E63) pickup bed models. Available to order when (ZW9) pickup bed delete and (QF6) LT275/70R18E all-terrain, blackwall tires are ordered.)
Tires, LT275/70R18E all-terrain, blackwall (Requires single rear wheels.)
Wheelhouse liners, rear (Not available with dual rear wheel models.)
Wheels, 18" (45.7 cm) machined aluminum wheel with Dark Grey metallic accents (Requires single rear wheels.)
INTERIOR
4G LTE Wi-Fi Hotspot capable (Terms and limitations apply. See onstar.com 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
Compass, located in instrument cluster
Cruise control, steering wheel-mounted
Defogger, rear-window electric
Door locks, power
Driver Information Center, 4.2" diagonal color display includes driver personalization
Driver memory, recalls driver "presets" for power driver seat and outside mirrors
Exterior Temperature Display located in radio display
Floor covering, color-keyed carpeting
Floor mats, carpeted front (Deleted when LPO floor liners are ordered or (BKF) Premium Floor Liners are ordered.)
Floor mats, carpeted rear (Deleted when LPO floor liners are ordered or (BKF) Premium Floor Liners are ordered.)
GMC Connected Access capable (Subject to terms. See onstar.com or dealer for details.)
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. With (ZW9) pickup bed delete no provision for a trailer tire pressure monitor system will exist but all the other (U1D) features will remain.)
Instrument cluster, 6-gauge cluster featuring speedometer, fuel level, engine temperature, tachometer, voltage and oil pressure
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) (Deleted with (ZW9) pickup bed delete.)
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
Remote vehicle starter system
Seat adjuster, driver 10-way power including lumbar
Seat adjuster, passenger 10-way power including lumbar
Seat trim, Perforated Leather-appointed front outboard seating positions
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, center fold out armrest with 2 cupholders, full cab width underseat storage, (includes child seat top tether anchor)
Seating, heated driver and front outboard passenger
Seats, front 40/20/40 split-bench with covered armrest storage and under-seat storage (lockable) (Not available with (PCY) SLT Convenience Package, (PDB) SLT Premium Package or (PDC) Texas Edition SLT Premium Package.)
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
USB Ports (Instrument Panel with bench seat), 2 also includes 1 SD card reader (first row). With (A50) Bucket Seats, ports are inside console and also includes auxiliary jack
USB ports, dual, charge-only (2nd row)
Window, power front, drivers express up/down
Window, power front, passenger express up/down
Windows, power rear, express down
MECHANICAL
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. Not included with (ZW9) pickup bed delete.)
Cooling, auxiliary external transmission oil cooler
Cooling, external engine oil cooler
Engine, 6.6L V8 with Direct Injection and Variable Valve Timing, gasoline (401 hp [299 kW] @ 5200 rpm, 464 lb-ft of torque [629 N-m] @ 4000 rpm)
Four wheel drive
Frame, fully-boxed, hydroformed front section and a fully-boxed stamped rear section
GVWR, 11,350 lbs. (5148 kg) with single rear wheels (Included and only available with TK30743 model and (L8T) 6.6L V8 gas engine. Requires single rear wheels.)
Pickup bed includes bed assist step (Deleted when (ZW9) pickup bed delete is ordered.)
Rear axle, 3.73 ratio (Requires (L8T) 6.6L V8 gas engine.)
Recovery hooks, front, frame-mounted, Black
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 Package (Not available with (X31) Off-Road Package.)
Trailer brake controller, integrated
Transfer case, two-speed active electronic Autotrac with push button control (Requires 4WD models.)
Transmission, 6-speed automatic, heavy-duty
PACKAGE
ProGrade Trailering System includes (PZ8) Hitch Guidance with Hitch View and (U1D) In-vehicle Trailering App
Trailering Package includes trailer hitch, 7-pin and 4-pin connectors and (CTT) Hitch Guidance (Deleted when (ZW9) pickup bed delete is ordered.)
PROCESSING-OTHER
Trailering Information Label provides max trailer ratings for tongue weight, conventional, gooseneck and 5th wheel trailering (Not available with (ZW9) pickup bed delete.)
SAFETY
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 (Always use seat belts and child restraints. Children are safer when properly secured in a rear seat in the appropriate child restraint. See the Owner's Manual for more information.)
Daytime Running Lamps LED signature lighting
HD Rear Vision Camera (Deleted with (ZW9) pickup bed delete. Not available with (CMT) Gooseneck / 5th Wheel Prep Package.)
Hitch Guidance dynamic single line to aid in truck trailer alignment for hitching (Deleted with (ZW9) pickup bed delete.)
Hitch Guidance with Hitch View with image adjustment, Pan/Zoom/Tilt (Deleted with (ZW9) pickup bed delete.)
OnStar and GMC connected services capable (Terms and limitations apply. See onstar.com or dealer for details.)
Rear Seat Reminder
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 behavior. 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)