GMC Sierra 4WD AT4 2020

The 2020 GMC Sierra 4WD AT4 is an SUV or crossover that offers 16/21 MPG city/highway, plus a 18 MPG combined estimate. Available trim information includes Auto 10-spd, 8 cyl, 5.3 L, which helps narrow the exact configuration when comparing listings.

Under the hood, it features an 8-cylinder 5.3L engine paired with an Automatic 10-spd transmission. The 4-Wheel Drive drivetrain and Regular fuel setup give shoppers a quick snapshot of expected driving feel, ownership costs, and everyday usability.

With a Regular engine and 4-Wheel Drive drivetrain, the 2020 GMC Sierra 4WD AT4 is suited for family trips, cargo flexibility, and all-weather errands. Before buying, compare service history, real-world MPG, tire condition, and feature differences across trims so the listing matches the specs shown here.