JD Power APEAL Study, JD Power Initial Quality Study. Scores 21 Highway MPG and 15 City MPG! This Chevrolet Avalanche delivers a Gas/Ethanol V8 5.3L/325 engine powering this Automatic transmission. WHEELS, 4-20 X 8.5 (50.8 CM X 21.6 CM) POLISHED ALUMINUM (STD), TRANSMISSION, 6-SPEED AUTOMATIC, TRAILERING PACKAGE, HEAVY-DUTY includes (GU6) 3.42 rear axle ratio, (KNP) external transmission oil cooler and (KC4) engine oil cooler, provides increased trailering capabilities.* This Chevrolet Avalanche Features the Following Options *TIRES, P275/55R20, ALL-SEASON, BLACKWALL (STD), SUNROOF, POWER, TILT-SLIDING with express-open and wind deflector, SEATS, FRONT BUCKET with Perforated leather-appointed seating, (AG1) 12-way power driver and (AG2) front passenger seat adjusters, power lumbar control, heated and cooled seats, 2-position driver memory (including lumbar), adjustable head restraints, storage pockets and floor console (STD), REAR AXLE, 3.42 RATIO, LTZ PREFERRED EQUIPMENT GROUP includes standard equipment, LPO, THEFT-DETERRENT WHEEL Security system that sets off the vehicle alarm system if the vehicle is jacked up or towed - designed to protect 20/22 SPO upsize wheels, LPO, FRONT CONSOLE ORGANIZER, LPO, ALL-WEATHER FLOOR MATS, FIRST AND SECOND ROW, LICENSE PLATE PROVISION, FRONT, ENGINE, VORTEC 5.3L V8 SFI FLEXFUEL with Active Fuel Management, capable of running on unleaded or up to 85% ethanol (with gas - 320 hp [239 kW] @ 5400 rpm, 335 lb-ft of torque [454 N-m] @ 4000 rpm, with E85 ethanol - 326 hp [243 kW] @ 5300 rpm, 348 lb-ft of torque [472 N-m] @ 4400 rpm), aluminum block (STD).* Expert Reviews!*As reported by KBB.com: If you need the 6-passenger capacity of an SUV, but the stuff you regularly haul behind the seats is frequently dirty or dripping something you’d rather not clean up, the 2013 Chevy Avalanche truck is the vehicle for you. But don’t wait: This is the Avalanche’s final year of production.