Spare tire lock Single two-sided key Side guard door beams Restraint provisions child rear seat rear facing Pwr steering Headlamps-On and key-in-ignition warning buzzers Head restraints adjustable on driver and front passenger outboard seats Fog lamps 4-wheel drive. This GMC Sierra 3500HD has a dependable Turbocharged Diesel V8 6.6L/403 engine powering this Automatic transmission.* Experience a Fully-Loaded GMC Sierra 3500HD SLT *.* See What the Experts Say!*As reported by KBB.com: If you need to haul big payloads exceeding 10000 pounds or conventionally tow up to 18000 pounds the 2014 GMC Sierra HD has you covered. The Denali trim should hold special appeal for those who use their work truck as a daily driver.