KBB.com 10 Most Awarded Brands. Delivers 22 Highway MPG and 16 City MPG! This Chevrolet Silverado 1500 boasts a Gas V8 5.3L/325 engine powering this Automatic transmission. WHEELS. 18 X 8.5 (45.7 CM X 21.6 CM) BRIGHT-MACHINED ALUMINUM (STD). WHEEL. FULL-SIZE SPARE. 17... via V12 Software