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2020 GMC Model Year Changes




The Acadia gets a refresh for 2020 including new, standard LED headlights, a new grille, and front and rear fascias. The headlight design is in the "C" shape other GMCs have adopted lately.

A new mid-level engine is inserted between the base 2.5-liter 4-cylinder and the top-level 3.6-liter V6. A 2.0 turbo, it produces 230 horsepower, 37 more than the 2.5 and 80 less than the V6. All engines now get a 9-speed automatic to replace the 6-speed. All engines now feature automatic start/stop technology, now with the ability to be disabled.

Blind spot warning, Rear Cross Traffic Alert and Rear Park Assist are all now standard on all models.

A new trim-level joins SL, SLE SLT and Denali: AT4. Those familiar with other GMC vehicles will recognize this off-road trim. Predictably, all-wheel drive is standard. The AT4, like the previous Adventure Package, eliminates the third seating row and makes do with 5-passenger seating.

Hands-free operation is now standard with the power liftgate.


2020 GMC Canyon

The Canyon now has standard Tire Fill Alert which helps a driver inflate the tires to the proper pressure; it beeps the horn when the proper pressure is reached. The highest end stereo system is redesigned.

All Terrain now offers Forward Collision Alert and Lane Departure Warning.

Tailgate locking and unlocking is now included with the keyless remote.

Longbed Crew Cab is now only available in 4WD.


2020 GMC Savana

Optional diesel engine gets an improved transmission.


2020 GMC Sierra

The Sierra "Limited" is no longer offered. Basically just the previous generation (2014-2018) model but offered only in Double Cab with one engine, it's now gone completely.

New CarbonPro Edition has an exclusive black chrome grille, carbon fiber composite bed and grey 18 or 20-inch wheels. This package is the only way to get the long-anticipated carbon bed with its legendary strength.

A new Bed View Camera shows a remote image of the cargo box, especially useful for a fifth-wheel hookup.

Adaptive Cruise Control is now available on the SLT, AT4 and Denali.

Sierra HD

2020 GMC Sierra 3500 Crew Cab Denali

Along with an all new chassis made of stronger and lighter mixed materials, the heavy duty Sierra get a new base gasoline engine, 6.6 liters and 401 horsepower. The diesel option remains unchanged but now it comes with a heavy-duty 10-speed automatic. A fully automatic transfer case is now available, letting owners get extra traction on dry roads without damage to the tires or driveline.

The Multi-Pro tailgate with its umpteen different modes migrates to the Sierra HD, but unlike the Sierra 1500 you don't have to opt for a high trim-line to get it, it's optional on all models starting with the base.

Sierra HD SLT, AT4 and Denali now offer a heads-up display. This feature projects information such as speed, navigation directs and even an inclinometer directly onto the windshield in the driver's field of view.

Automatic Emergency Braking is now offered. IntelliBeam (Auto High Beams), Blind Spot Warning and Rear Cross Traffic Warning are also new safety options.


 2020 GMC Terrain stock photo

The biggest change is the discontinuation of the Diesel engine. First it was reported that the diesel would only be offered in front-wheel drive models, but EPA certification and other paperwork see the diesel scrubbed completely for 2020.

Spurred by the Insurance Institute for Highway Safety, Automatic Emergency Braking and Forward Collision Alert becomes standard. Also now standard: Lane Keep Assist, Lane Departure Warning, Front Pedestrian Braking and IntelliBeam Headlights (automatic high beams). This package was not only optional for 2019, but only available on SLT and Denali models.

The previously low-speed only automatic braking was upgraded to all speeds and pedestrian detection is added.

Terrain Denali now has standard front parking sonar in addition to the rear sonar previously standard. Denali also receives more premium shocks with an internal valve to give a smoother ride.

Adaptive Cruise Control is now also offered on the SLE.


2020 GMC Yukon XL

No changes.


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