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A capable truck with loads of technology.

2020 GMC Sierra 1500 | CarMax

The GMC Sierra 1500 was first introduced more than two decades ago and continues to innovate with the 2020 model. Updates include the addition of adaptive cruise control, an Enhanced ProGrade Trailering camera, expanded availability of the 10-speed automatic transmission, and more.

While we currently do not have many 2020 GMC Sierra 1500s on our lots, we look forward to selling more in the future. Here's what you'll learn in this 2020 GMC Sierra 1500 review:

Key Specs and Features

MPG

2WD:

  • The 2020 GMC Sierra 1500 with the 4.3L engine and six-speed automatic transmission gets an EPA-estimated 17 mpg combined.1
  • The 2020 GMC Sierra 1500 with the 5.3L engine and six-speed automatic transmission gets an EPA-estimated 17 mpg combined or 19 mpg combined with the eight-speed automatic.1
  • The 2020 GMC Sierra 1500 with the 2.7L engine and eight-speed automatic transmission gets an EPA-estimated 20 mpg combined.1
  • The 2020 GMC Sierra 1500 with the 3.0L engine and 10-speed automatic transmission gets an EPA-estimated 26 mpg combined.1

4WD:

  • The 2020 GMC Sierra 1500 with the 5.3L engine and six-speed automatic transmission gets an EPA-estimated 17 mpg combined (16 mpg for AT4 trim), 18 mpg combined with the eight-speed automatic, or 19 mpg combined with the 10-speed automatic (20 mpg for AT4 trim).1
  • The 2020 GMC Sierra 1500 with the 2.7L engine and eight-speed automatic transmission gets an EPA-estimated 20 mpg combined.1
  • The 2020 GMC Sierra 1500 with the 6.2L engine and 10-speed automatic transmission gets an EPA-estimated 17 mpg combined.1
  • The 2020 GMC Sierra 1500 with the 3.0L engine and 10-speed automatic transmission gets an EPA-estimated 24 mpg combined.1
  • The 2020 GMC Sierra 1500 with the 4.3L engine and six-speed automatic transmission gets an EPA-estimated 17 mpg combined.1

Cargo Space:

The 2020 GMC Sierra offers multiple configurations with different bed sizes as follows:

  • Regular Cab models come with either a six-foot-six (72 cubic feet of cargo volume) or eight-foot (98 cubic feet) bed.
  • Double Cab models come with an eight-foot bed (98 cubic feet).
  • Crew Cab models come with either a five-foot-eight (63 cubic feet) or six-foot-six (72 cubic feet) bed.

Towing Capacity:

  • Regular Cab models can tow an estimated maximum of 10,000 pounds (2WD) or 9,800 pounds (4WD) when properly equipped.2
  • Double Cab models can tow an estimated maximum of 11,300 pounds (2WD) or 12,200 pounds (4WD) when properly equipped.2
  • Crew Cab models can tow an estimated maximum of 11,400 pounds (2WD) or 12,100 pounds (4WD) when properly equipped.2

Seating Capacity:

The 2020 GMC Sierra 1500, depending on configuration, is able to accommodate the following number of passengers:

  • Regular Cab models may seat up to six people.
  • Double Cab models may seat up to six people.
  • Crew Cab models may seat up to three people.

Engine Options:

The 2020 GMC Sierra 1500 is available with the following engines:

  • 4.3L V6 with 285 hp and 305 lb-ft of torque
  • 5.3L V8 with 355 hp and 383 lb-ft of torque
  • 2.7L turbocharged four-cylinder with 310 hp and 348 lb-ft of torque
  • 6.2L V8 with 420 hp and 460 lb-ft of torque

Tech Features:

Every 2020 GMC Sierra 1500 is generously equipped and there is no shortage of options customers can choose to add on.

  • The base grade includes Bluetooth® connectivity, backup camera, single-zone climate control, and Teen Driver technology.
  • SLE adds available 4G LTE Wi-Fi hotspot, a six-speaker stereo system, cruise control, and rear-seat reminder system.3
  • Elevation adds a 12-volt rear power outlet, keyless entry, remote engine start, and extra USB ports.
  • ATR adds heated front seats, smart trailer integration, and Apple CarPlay®and Android Auto™ compatibility.

Rankings

The GMC Sierra 1500 has a strong sales history at CarMax. It has been featured in these ranking lists:

5 Reasons to Buy

1. Good looks

The 2020 GMC Sierra, with its muscular body panels, bold grille, and unique C-shaped headlight housings, provides an exciting ride that's as practical and it is stylish. The grade-topping Denali bundles big 20-inch alloy wheels, as well, making the 2020 GMC Sierra an undeniably good-looking ride.

2. Flexible storage

2020 GMC Sierra 1500: Trunk Cargo | CarMax

A GMC exclusive, the MultiPro tailgate (AT4 trim) does more than just keep things from sliding out of the bed. Among its six functions are an extension feature to fit longer items like surfboards, a flip-down outer door to allow easier access to bed contents, and the ability to act as a full-width step for easy ingress and egress. On the SLT trim and above, the ProGrade Trailering System provides a total of 15 camera views.

3. Well appointed

2020 GMC Sierra 1500: front seats | CarMax

The 2020 GMC Sierra is proof that a pickup can be as comfortable as it is practical. Optional on the SLT and standard on the ATR and above, the front occupants will enjoy heated and ventilated front seating, and the back seats heat up too. Similarly, the steering wheel in SLT and above trims has a hand-warming function.

2020 GMC Sierra 1500: Backseat | CarMax

4. Built-in entertainment

2020 GMC Sierra 1500: Tech Dash | CarMax

There's no excuse to be bored when you have some downtime in the 2020 GMC Sierra 1500, whether on the worksite or out camping. A seven-inch touchscreen display, powered by the GMC infotainment system, is standard equipment, but move up to an SLT or beyond, and the monitor grows to eight inches. New for 2020 is the available ability to stream SiriusXM satellite radio with a subscription.3

5. An engine for everyone

2020 GMC Sierra 1500: Engine | CarMax

Boasting an impressive choice between four different engines and three different transmissions, there's a GMC Sierra 1500 for every buyer. Certain powertrains like the 3.0L motor mated to the efficient 10-speed automatic transmission yields an EPA-estimated 26 mpg combined.1 Power hungry? The 6.2L V8 pumps out 420 horses.


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What You Need to Know

2020 GMC Sierra 1500 Available Trims

Base: Includes four-way manually-adjustable front seats, LED daytime running lamps, single USB port, and more.

SLE: Unlocks a 40/20/40-split-bench front seat with covered armrest storage, leather-wrapped steering wheel, and more.

Elevation: Packages a rear-window defogger, anti-theft system, and remote engine start.

SLT: Focuses on convenience features such as 10-way power-adjustable driver seat with lumbar support, driver-seat memory, and dual-zone climate control.

AT4: Kicks styling up a notch by giving the interior a Jet Black finish and aluminum accents, a two-inch factory-installed suspension lift, and dual exhaust pipes.

Denali: This top-of-the-line trim goes all out with open-pore ash-wood interior panels, wireless charging capability, parking assist, and adaptive dampening.

2020 GMC Sierra Available Colors

  • Cardinal Red
  • Dark Sky Metallic
  • Onyx Black
  • Pacific Blue Metallic
  • Quicksilver Metallic
  • Satin Steel Metallic
  • Summit White
  • Tangier Orange
  • Wheatland Yellow
  • Woodland Green

2020 GMC Sierra Interior

  • Cargo Space: Regular Cab has 72 or 98 cubic feet of cargo volume, Double Cab has 98 cubic feet, and Crew Cab has 63 or 72 cubic feet.
  • Seating Capacity: Regular Cab and Double Cab seat up to six people while Crew Cab seats up to three people.
  • Infotainment: A seven-inch touchscreen comes standard while SLT and above trims receive an eight-inch touchscreen and Apple CarPlay and Android Auto.

Average CarMax Prices

The 2020 GMC Sierra 1500 is a newer model year and we currently have a limited number in our inventory. Pricing data for this model at CarMax is currently unavailable. See below to learn more about previous model years.

Similar Model Years

If you like the 2020 GMC Sierra 1500, check out some previous model years of this vehicle with similar features.

RepairPal | CarMax

Safety and Reliability

RepairPal® Reliability Ratings for the 2020 GMC Sierra 15004

The 2020 GMC Sierra 1500 is a newer model and we currently have a limited number in our inventory. You may also consider other used GMC Sierra 1500s with similar features. Below are RepairPal reliability ratings for prior model years of the GMC Sierra 1500.

  • Overall RepairPal Reliability Rating - 3.5/5.0
  • Average annual cost of unscheduled repairs and maintenance: $727.00

RepairPal Reliability Ratings are based on the actual cost, frequency, and severity of unscheduled repairs and maintenance on make/model data for select 2010–2019 vehicles. The reliability of a specific vehicle may vary depending on its maintenance and driving history, model year, trim, and features. Learn more at www.carmax.com/repairpal-reliability.

NHTSA Safety Ratings - 2020 GMC Sierra 1500

The 2020 GMC Sierra 1500 received an overall 4/5 by the National Highway Traffic Safety Administration (NHTSA). Certain vehicles may have unrepaired safety recalls. Click here to look up a specific vehicle.

Similar Vehicles

If you're interested in the 2020 GMC Sierra 1500 you should also check out these similar vehicles from previous model years.

RAM 1500

The RAM 1500 entered its fourth generation last year emerging nearly 225 lbs. lighter than before. The 2019 truck sits on a much more rigid frame made of 98 percent high-strength steel giving it greatly improved handling. A standard second-gen 3.6L Pentastar V6 lurks under the hood producing 305 hp and 269 lb-ft of torque. Other features on the 2019 base model include:

  • ParkView backup camera
  • Five-inch touchscreen and Uconnect infotainment system
  • Locking tailgate

Toyota Tundra

This full-size pickup is sold in four-dozen possible configurations and comes with a standard 4.6L V8 motor making 310 hp and 327 lb-ft of torque. Customers have a choice between 2WD or 4WD. Three cab styles suit a variety of needs (two-door Regular Cab, four-door Double Cab, or super-sized four-door CrewMax). All 2017–2019 Tundras include as standard:

  • High Solar Energy-Absorbing glass
  • Bluetooth hands-free
  • Windshield wiper de-icer
  • Front and rear mudguards
  • Heated power side mirrors

Ford F-150

With 70 years of history, the Ford F-150 needs little introduction, and the latest version is the best yet. The last redesign happened in 2015 but the 2017 model year brought with it a refreshed 3.5L turbocharged EcoBoost engine mated to a 10-speed automatic transmission. Both 2WD and 4WD are available. Some standard features of 2017–2019 models are as follows:

  • 17-inch aluminum wheels
  • Trailer-sway control
  • Vinyl flooring

The Bottom Line

The 2020 GMC Sierra 1500 truly does it all. Whether you're after a stylish light-duty truck, one packed with the latest technology, or just something practical to comfortably ride in while getting to and from your job, this vehicle might be the one for you.

Interested in learning more? Check out these related articles:

1Fuel economy figures are based on EPA estimates for when vehicle sold as new. Fuel economy may vary for reasons like driving conditions and vehicle history. Unless specified, figures are for vehicles equipped with an automatic transmission. See fueleconomy.gov.
2Various factors may impact towing capacity, including weight of passengers, cargo, and options/accessories.
3Requires data plan and compatible device.
4RepairPal Reliability Ratings are provided by RepairPal and CarMax is not responsible for their accuracy. Learn more at repairpal.com/reliability.
Unless otherwise noted, information related to these featured vehicles comes from third-party sources, including manufacturer information. Product and company names may be trademarks or registered trademarks of third-party entities. Use of them does not imply any affiliation with or endorsement by these entities.