The 2020 GMC Sierra HD AT4 has an all-wheel drive mode called “Auto 4WD” to complement the traditional, 2WD, 4WD High and 4WD Low modes. The 2020 GMC Sierra HD AT4 has an all-wheel drive mode called ...

Production of four-wheel-drive (4WD) vehicles in North America is expected to increase 10% over the next four years, according to the JD Power and Associates 2004 Global 4WD-Driveline Market Report ...

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