standard on the SLT2 model and optional on the SLT1. The SLE model has 18 inch painted aluminum wheels with P255/65R-18 tires. The SLT1 comes standard with 18 inch machined aluminum wheels. Engine and transmission The Acadia uses GM's High Feature LY7 V6 that was introduced in the Cadillac CTS. In the Acadia, the engine produces and of torque. The Acadia also uses the new GM-Ford 6-speed automatic transmission. The 2009 model year engine was the direct injected LLT, producing and of torque. The 2012 Acadia has a 3.6 L V6 engine producing at 6,300 rpm and of torque at 3,400 rpm. The 2016 Acadia Limited has a 3.6 L V6 engine producing 310 hp (231 kW) and 271 lb ft (367 Nm) of torque. Interior The Acadia features available 3-row, 7 or 8-seater seating, although the post-2017 models downsized the 3rd-row seating capacity from 3 to 2 passengers. Inside, the Acadia features more contemporary trim than the Outlook, including chrome and satin nickel textures, and a wider variety of two-toned interior colors such as an Ebony and Light Titanium (grey) cloth upholstery, and a choice of either Ebony, Light Titanium (grey) or Brick (brown) leather upholstery. A heads-up display is one of the available options exclusive to the Acadia and standard on the Acadia Denali. Acadia Denali The Denali version of the Acadia arrived at dealerships in 2010 as 2011 model. This upgraded trim is available in FWD and AWD versions in seven- or eight-passenger form and features monotone paint, honeycomb grille, unique front and rear fascias, along with HID headlamps, chrome accents, exhaust tips, and six-spoke 20-inch wheels. Interior upgrades include perforated leather seating and wood trim. The Acadia Denali joins its SUV siblings, the Terrain Denali, the Yukon Denali and Yukon XL Denali, and marks GMC's first crossover to take the Denali badge. Trim levels Safety A unibody construction helps lower center of gravity, compared to previous truck-based GM SUVs, reduces the risk of rollover accidents. Much of the Acadia's structure is reinforced with high-strength steel, including a steel cross-car beam welded across the floor between the B-pillars. The Acadia has six different airbags equipped in the vehicle; two dual-stage front air bags for the driver and front passenger, two seat-mounted side-impact air bags in the first row and two head curtain side impact air bags that cover all three seating rows. Similar to the Volvo XC90,