An additional package adds upsized Brembo-branded six-piston brakes up front with red calipers, but the Big Kahuna here is the Performance Package that adds magnetic dampers and a 6.2-liter V-8 rated at 420 horsepower and 460 pound-feet of torque. That’s a hefty upgrade over the standard Tahoe and Suburban models’ 5.3-liter, 355-hp V-8. The 6.2-liter is cribbed from the luxo-laden GMC Yukon Denali and the Cadillac Escalade and it mates here to a 10-speed automatic transmission. There’s actual underhood grunt to back up its beefier looks. Chevy starts with a cleaned up exterior.