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2020 GMC Sierra 1500 Overview

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2020 GMC Sierra 1500 Denali
Photo: GMC

With its unique blend of upscale convenience and powerful capability, the 2020 GMC Sierra 1500 is right at home cruising down the highway, tackling the dirtiest of jobs, or going off-road. This truck is available in six trim levels: Sierra, SLE, Elevation, SLT, AT4, and Denali. Regular, double, and crew cab configurations are available, along with three box lengths and 2WD or AWD.

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2020 GMC Sierra 1500
Photo: GMC

New for 2020

The GMC Sierra 1500 was completely redesigned for 2019, so the 2020 model doesn’t feature a long list of changes. In the most significant update, the CarbonPro carbon fiber bed is now available for the AT4 and Denali trims. This durable, cutting-edge component boasts outstanding resistance to dents, scratches, and corrosion — and it’s significantly lighter than a traditional steel bed. Other important additions include a newly available Adaptive Cruise Control – Camera system and Enhanced ProGrade Trailering with a new transparent trailer view.

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2020 GMC Sierra 1500 AT4
Photo: GMC

Performance and Powertrains

The 2020 GMC Sierra 1500 offers drivers a choice of six capable powertrains, including the brand-new Duramax turbodiesel:

  • 4.3-liter EcoTec3 V6: 285 horsepower, 305 lb-ft of torque, six-speed automatic transmission
  • 2.7-liter turbo four-cylinder: 310 horsepower, 348 lb-ft of torque, eight-speed automatic transmission
  • 5.3-liter EcoTec3 V8: 355 horsepower, 383 lb-ft of torque, six-speed automatic transmission
  • 5.3-liter EcoTec3 V8 with DFM: eight-speed (2WD) or 10-speed (4WD) automatic transmission
  • 6.2-liter EcoTec3 V8: 420 horsepower, 460 lb-ft of torque, 10-speed automatic transmission
  • 3.0-liter Duramax turbodiesel inline-six: 277 horsepower, 460 lb-ft of torque, 10-speed automatic transmission

2020 GMC Sierra 1500 Elevation
Photo: GMC

Exterior Features

The Sierra 1500 offers a wide range of work-friendly features. The standard CornerStep rear bumper enables convenient bed access, and cab-mounted cargo lamps make it easier to do jobs before sunrise and after sunset. Available tailgate features include EZ lift and lower assist, power lock and release, and the cutting-edge MultiPro Tailgate setup with six different functions.

2020 GMC Sierra 1500 Denali
Photo: GMC

Interior Features

The cabin of the Sierra 1500 provides serious comfort and convenience. The seats feature available power adjustability and leather trim. Also available are remote start, heated seats, and a heated steering wheel for cold days. Stash extra cargo with optional rear underseat storage, a console vault, and covered armrest storage. Keep devices powered up with available wireless charging and multiple USB ports throughout the interior.

2020 GMC Sierra 1500 AT4
Photo: GMC


From the base trim to the Denali, riding in the Sierra 1500 is a high-tech experience. The standard 7-inch GMC Infotainment System provides Bluetooth, Apple CarPlay, Android Auto, and Wi-Fi hotspot capability for powerful connectivity. Higher trims add features like SiriusXM, built-in navigation, and a larger touch screen. The truck’s advanced trailering technology includes options like a hitch guidance camera, a bed view camera, and an in-vehicle trailering app. The optional 15-inch Head-Up Display and Rear Camera Mirror deliver added visibility and convenience.