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2020 GMC Sierra 2500 review

Research, photos, specs, and expertise

GMC Sierra 2500 highlights

Customer rating

RepairPal reliability rating

Pros

  • Amazing towing capabilities
  • Innovative, advanced towing camera solutions
  • Powerful diesel engine

Cons

  • Most useful options only available on higher trims
  • Poor gas mileage
  • Very few driver-assistance features

Mileage (EPA estimate)

(data not available)

Pricing for current inventory

(no current inventory)

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All GMC Sierra 2500 years

What is new for the 2020 GMC Sierra 2500?

  • The Sierra 2500 is available in a new trim called the AT4.
  • Sierra 2500 trims have been upgraded with Smart Key, Rear Seat Heaters, and Blind Spot Monitor as standard equipment this year.
  • The SLT trim now comes with Heated Steering Wheel as standard equipment.

2020 GMC Sierra 2500 trims

Curious how GMC Sierra 2500 trims differ? Use our side-by-side vehicle comparison to see the differences and similarities

Base:

  • 6.6L
  • 445-hp, 910-lb-ft of torque 6.6L
  • 401-hp, 464-lb-ft of torque 6.6L
  • Overhead Airbags
  • Side Airbags
  • Traction Control
  • Vinyl Seats
  • Automatic Transmission
  • Turbo Diesel Engine
  • Bluetooth Technology
  • Apple CarPlay
  • View our GMC Sierra 2500 inventory

SLE:

SLT:

  • Includes all features available on the SLE
  • Remote Start
  • Smart Key
  • Leather Seats
  • Rear Defroster
  • Power Seats
  • Memory Seats
  • Front Seat Heaters
  • Heated Steering Wheel
  • View our GMC Sierra 2500 SLT inventory

AT4:

Denali:

  • Includes all features available on the AT4
  • Lane Departure Warning
  • Parking Sensors
  • Blind Spot Monitor
  • Running Boards
  • 20 Inch Plus Wheels
  • BOSE Sound System
  • Navigation System
  • View our GMC Sierra 2500 Denali inventory

5 reasons to buy the 2020 GMC Sierra 2500

1. Powerful engine options

If you love to feel the might of a large engine, the 2020 GMC Sierra 2500 can deliver. The truck comes standard with a 401-hp 6.6L V8 that produces 464 lb-ft of torque. Or, you can opt for the available turbo-diesel. That 6.6L V8 engine produces 445 hp and 910 lb-ft of torque. With either option, you'll feel the power any time you accelerate, tow, or haul.

2. Suburb towing capacity

Whether you're gearing up for a cross-country trip with your fifth wheel, hauling your barrel horses to competition, or bringing small machinery to job sites, the 2022 GMC Sierra is up for the task. The standard 401-hp V8 can tow up to an estimated 24,000 pounds when properly equipped.

The optional 445-hp turbo diesel can up to 26,000 pounds as a regular or double cab, and 27,000 pounds as a crew cab when properly equipped.

3. Tech-supported towing

Need support on challenging trailer maneuvers? The 2020 GMC Sierra 2500 can help set your mind at ease, thanks to an array of available technology to help make towing easy. The available ProGrade Trailering system offers 15 camera views, including one that allows you to see "through" the trailer, helping you back up perfectly on the first try. The available iN∙Command® control system lets you monitor temperature, tire pressure, and more in your trailer, if it's equipped.

4. Unique tailgate

When you're on the job, crawling in and out of the truck bed can eat up valuable time. The GMC MultiPro tailgate, available on all trims of the 2020 GMC Sierra 2500, aims to make your workday a bit easier. The tailgate can be transformed into six different configurations, including a workbench. It can be used to stop materials and tools from sliding around and can be folded down for easier access to the bed.

5. Upscale interior

After a long day of work or fun in the sun, you want to be comfortable on your ride home. The 2020 GMC Sierra makes that easy. The high-end Denali trim offers lots of luxury touches, like premium leather seating and wood trim. Even with the SLT trim, you'll have creature comforts including leather-appointed seats, heated front seats and steering wheel, and remote start functionality through the key that's perfect for keeping your truck warm or cool before you get in.

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Ratings & reliability

Customer ratings

3.7 out of 5

3 customer reviews

RepairPal reliability rating

3
Above Average

RepairPal gave the GMC Sierra 2500 an overall reliability rating of 3 out of 5 stars, which RepairPal describes as Above Average. This rating ranks GMC Sierra 2500 10th out of 19 among Fullsize Trucks.

View RepairPal's full rating of the GMC Sierra 2500

GMC Sierra 2500 features and specs

Curious how GMC Sierra 2500 trims differ? Use our side-by-side vehicle comparison to see the differences and similarities

SLE 2WD 2D Regular Cab

Standard Features

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

Optional Features

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

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

79.94"

Leg room

F 44.53"

Head room

F 43.11"

Front tires

LT245/75R17E

Rear tires

LT245/75R17E

Seating capacity

3

Max towing capacity

1450/14500 lbs.

Transmission

Automatic

2020 GMC Sierra 2500 FAQ

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