The Sierra, and its Chevrolet Silverado twin, is a well-rounded pickup with an available full-time 4WD system and generous payload capacity. Ride quality is decent with the Z85 suspension, and handling is secure. High-end models have very good interior fit and finish, but all have simple controls. The crew cab is roomy, with easy access. A six-speed automatic slightly improves fuel economy and acceleration with the tested 5.3-liter V8. We found the hybrid drivetrain considerably improved fuel economy on the Tahoe hybrid we tested. The luxurious Sierra Denali model has permanent AWD and a powerful 6.2-liter V8. IIHS side-crash-test results are just Acceptable.