The 2019 GMC Sierra ... 18- or 20-inch alloy wheels. The Sierra AT4 comes standard with a 5.3-liter V8 coupled to an eight-speed automatic transmission. In the standard Sierra 1500, this engine ...

These days, GMC offers six vehicles with the AT4 package: three SUVs and three pickups, including the Canyon, Sierra 1500 ... blackwall tires, 2-inch factory lift with off-road suspension ...