Chevy Avalanche's unsurpassed cargo box versatility comes from such features as its lockable top-box storage compartments, composite PRO-TEC tailgate and three-piece cargo cover. A GM-exclusive Midgate can turn Avalanche from a six-passenger SUV with a 5' 3" cargo box to a three-passenger full-size pickup with an 8' 1" cargo box in under a minute. Largest trunk in the industry. The newly standard StabiliTrak Electronic Stability Control System (only offered on 1500 models) helps improve driver and passenger safety. (edit this text)