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2020 GMC Sierra 3500 review

Research, photos, specs, and expertise

GMC Sierra 3500 highlights

Customer rating

RepairPal reliability rating

Mileage (EPA estimate)

(data not available)

Pricing for current inventory

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All GMC Sierra 3500 years

What is new for the 2020 GMC Sierra 3500?

  • Trim Added: New Sport trim for enhanced performance and styling.
  • Standard Equipment on all: All models now include advanced safety features as standard.
  • New Equipment: Updated infotainment system with larger screen and improved user interface.
  • New Equipment: Available hybrid engine option for better fuel efficiency.

2020 GMC Sierra 3500 trims

Curious how GMC Sierra 3500 trims differ? Use our side-by-side vehicle comparison to see the differences and similarities

Base:

  • 6.6L
  • 401-hp, 464-lb-ft of torque 6.6L
  • 445-hp, 910-lb-ft of torque 6.6L
  • Traction Control
  • Vinyl Seats
  • Automatic Transmission
  • Bluetooth Technology
  • Apple CarPlay
  • Android Auto
  • 4WD/AWD
  • Side Airbags
  • View our GMC Sierra 3500 inventory

SLE:

SLT:

  • Includes all features available on the SLE
  • Memory Seats
  • Front Seat Heaters
  • Power Seats
  • Leather Seats
  • Remote Start
  • Smart Key
  • Heated Steering Wheel
  • Rear Defroster
  • View our GMC Sierra 3500 SLT inventory

AT4:

Denali:

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Ratings & reliability

Customer ratings

5 out of 5

1 customer reviews

RepairPal reliability rating

3
Average

RepairPal gave the GMC Sierra 3500 an overall reliability rating of 3 out of 5 stars, which RepairPal describes as Average. This rating ranks GMC Sierra 3500 14th out of 19 among Fullsize Trucks.

View RepairPal's full rating of the GMC Sierra 3500

GMC Sierra 3500 features and specs

Curious how GMC Sierra 3500 trims differ? Use our side-by-side vehicle comparison to see the differences and similarities

SLE 2D Regular Cab 2WD

Standard Features

  • Rear View Camera
  • Side Airbags
  • Overhead Airbags
  • Cloth Seats
  • Power Windows
  • Power Locks
  • Power Mirrors
  • Cruise Control
  • Air Conditioning
  • Traction Control
  • ABS Brakes
  • Heated Mirrors
  • Alloy Wheels
  • Tow Hitch
  • Dual Rear Wheels
  • Long Bed
  • Automatic Transmission
  • Auxiliary Audio Input
  • Android Auto
  • AM/FM Stereo
  • Bluetooth Technology
  • Apple CarPlay

Optional Features

  • Air Conditioning
  • Cloth Seats
  • Front Seat Heaters
  • Power Seat(s)
  • Remote Start
  • Smart Key
  • Parking Sensors
  • Rear View Camera
  • Lane Departure Warning
  • Heated Steering Wheel
  • Rear Defroster
  • Blind Spot Monitor
  • Power Mirrors
  • Heated Mirrors
  • Gooseneck Tow Hitch
  • Fifth Wheel Tow Hitch
  • Tow Hitch
  • Long Bed
  • Bed Cover
  • Bed Liner
  • Dual Rear Wheels
  • Alloy Wheels
  • Running Boards
  • Satellite Radio Ready
  • BOSE Sound System
  • Auxiliary Audio Input
  • Navigation System

Drive Wheels

Rear Wheel Drive (2WD)

Engine size

6.6L

Horsepower

401

Torque (ft-lbs)

464

Engine type

Gas

Fuel capacity

36

Wheelbase

141.55"

Overall length

235.5"

Width

81.75"

Height

80.94"

Leg room

F 44.53"

Head room

F 43.11"

Front tires

LT275/70R18

Rear tires

LT275/70R18

Seating capacity

3

Max towing capacity

1450/20000 lbs.

Transmission

Automatic

2020 GMC Sierra 3500 FAQ

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Statements of fuel economy or EV range are based on EPA and other third-party estimates for vehicles when new. Fuel economy and EV range will degrade with time and vary based on age, driving conditions, vehicle history, and other conditions. See fueleconomy.gov for more info.

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