Automotive Design and Production

JUL 2016

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www.ADandP.media 47 AD&P; ∕ JULY 2016 ACADIA As for the safety (from the standpoint of the interior, not the available front pedestrian braking, low-speed forward automatic braking, forward automatic braking, IntelliBeam automatic headlamp high-beam control, 360-degree camera system, safety alert seat, forward collision alert, lane- keep assist with lane-departure warning, nor the lane-change alert with side blind-zone alert), there's an industry-frst rear seat reminder: According to Tricia Morrow, General Motors global safety strategy engineer, each year children die from heat stroke having been forgotten in the back of vehicles. So because the Acadia is a family vehicle, they've developed a system that if the rear doors are opened at the start of a journey and then not reopened when the engine is shut of, the driver is alerted to check the back seat. Just in case. While the previous-generation Acadia was ofered with one engine, the 2017 model ofers a choice. There is an Ecotec 2.5-liter four cylinder engine that provides 194 hp and 190 lb-ft of torque and a 3.6-liter V6 that provides 310 hp and 271 lb-ft of torque. The four cylinder ofers GMC's frst application of fuel-saving, start-stop technology. Both engines feature direct injection and are mated to a six-speed automatic. The Acadia comes as a front- or all-wheel-drive vehicle (AWD). The AWD vehicles ofer a disconnect drive mode setting that disconnects the rear axle from the drive system to save fuel. As is now something of a mantra when it comes to new vehicle development at General Motors, there is a signifcant mass reduction compared to the outgoing model. Base vehicle to base vehicle they're looking at a weight reduction on the order of 700 pounds (2017: 3,956 pounds; 2016: 4,656 pounds). However, as the new vehicle has an I4 base engine and the previous model has a V6, it is worth looking at FWD models with V6s. In that case, the weight save is 600 pounds. Part of that is from the overall size reduction, with other factors including the use of high-strength steels that allow the use of thinner gauges, suspension changes, and new acoustic materials. The 2017 GMC Acadia is manufactured at the GM Spring Hill Assembly plant in Tennessee—the original Saturn plant. (Curiously enough, when the Acadia's sibling Saturn Outlook was being produced, it, like the Acadia, was being manufactured at the GM Lansing, Michigan, Delta Township Assembly plant.) The Acadia offers a drive mode selector ( just below the gear selector) that tailors chassis and powertrain settings for various driving conditions. The front-drive vehicles have Normal, Snow, Sport and Trailer/Tow modes; AWD models offer 2 x 4 (AWD disconnect), 4 x 4, Sport, Off Road and Trailer/Tow.

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