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GMC ACADIA 2007

The all-new Acadia is GMC’s first crossover SUV, offering seating for up to eight and combining the capability of an SUV with a smooth, responsive and car-like driving experience.

Acadia features a body-frame integral design that enables lower step-in height and the generous interior space of larger SUVs. A comprehensive safety system includes six standard air bags and standard StabiliTrak electronic stability control system with rollover mitigation technology.

Smooth, responsive ride and handling

Acadia rides on a long 118.9-inch (3020.7 mm) wheelbase and wide 67.28-inch (1709 mm) front/rear tracks – a combination that lowers the center of gravity and enables smooth, stable ride and handling.

Sharp reflexes are also supported by independent front and rear suspensions. The front suspension features a MacPherson strut design, with a direct-acting stabilizer bar and aluminum knuckles.

Isolated mounting points help reduce noise and vibration. The rear suspension uses a compact, state-of-the-art linked “H” design, which uses an isolated mounting system that reduces noise and vibration transmitted to the passenger compartment.

This design enables the handling prowess that comes with an independent suspension, but with minimal floor pan intrusion – a feature that helps the Acadia offer generous passenger and cargo space.

The suspension systems enable Acadia ’s 4,500- pound (2,042 kg) towing capacity. Acadia features standard power assisted rack-and-pinion steering, with variable-effort steering available. The suspension and steering system meet the road via standard 18-inch wheels and tires, with 19-inch wheels available.

Four-wheel disc brakes with ABS are standard. The Acadia also offers the following standard features that enhance ride and handling,as well as safety:

•StabiliTrak stability control system with rollover mitigation technology

•Traction control (FWD models)

•Tire pressure monitoring system

Acadia ’s body-frame integral structure enables lower entry/exit height for passengers. Despite the vehicle’s SUV-like front-end height, the front door step-in height is only 18.9 inches (480 mm); the rear door step-in height is 19.8 inches (503 mm).

Entry to the third-row seat is eased with very wide rear doors and GM’s exclusive Smart Slide second-row seat feature, which aids passenger access to the third-row seats.

Wider than the doors on most other SUVs, the Acadia ’s rear door width is enabled by the vehicle’s long wheelbase.The rear door opening was maximized by reducing the space between the rear door and the leading edge of the door opening. Engineers were able to maximize the opening space while providing optimal chassis integrity for maximum occupant protection.

Power train details

GM’s 3.6L V-6 with variable valve timing (VVT) and a new Hydra- Matic 6T75 six-speed automatic transmission is the Acadia ’s standard power train combination.Front-wheel drive and all-wheel drive configurations are available. The 3.6L V-6 VVT is a sophisticated dual-overhead camshaft engine based on GM’s global V- 6 architecture.

It was jointly developed at GM technical centers in Australia , Germany , Sweden and North America . The engine uses full four-cam phasing, rapid data processing and torque-based engine management to optimize power, economy and emissions performance.

In the Acadia, the 3.6L V-6 VVT produces 275 horsepower (205 kW) and 251 lb.-ft. of torque (340 Nm).The four-cam phasing operation of the variable valve timing system ensures linear delivery of torque across the rpm band, while features such as electronic throttle control deliver crisp, immediate response and feedback.

The engine uses electro-hydraulic vane-type phases to rotate the camshafts relative to the cam-drive sprockets, allowing infinitely variable combinations over a range of 50 degrees.

Additional engine features include:

•High-flow aluminum cylinder heads

•Four valves per cylinder

•Dual-stage variable intake manifold

•Low-restriction induction system

•Straight-runner intake manifold

•Sequential dual spray port fuel injection

•Coil-on-plug ignition system

•Electronic throttle control with integrated cruise control

The aluminum-intensive 3.6L V-6 VVT is designed to deliver its performance with world-class smoothness, quietness and durability. The camshaft chain drive incorporates a new, smaller-pitch chain, which is nearly silent during operation.

Other elements, including the cam covers, an acoustically shielded intake manifold and direct-mounted accessories are designed to reduce or eliminate conventional points of noise, vibration and harshness.

A long operating life is driven by heavy-duty and special components, such as a forged steel crankshaft, polymer-coated pistons and oil jets that drench the bottom of the pistons in cooling, lubricating oil.

The transmission’s six-gear configuration allows for a “steep” 4.48:1 first gear, which helps deliver exceptional launch feel, and a 0.74:1 overdrive sixth gear – the “tall” overdrive gear lowers rpm at high speeds, reducing noise and vibration. Fifth gear is 1:1 direct drive.

Shorter steps between the gears, compared with a four-speed automatic, enhance performance and feel, as the transmission quickly finds the best gear for the vehicle speed and road conditions.

Also, the 6T75 offers the capability of driver shift control (DSC), which allows the driver to use tap-up/tap down shifting to select the desired gear for specific road conditions, such as driving up a steep hill.

Acadia ’s available all-wheel drive system provides increased traction on slippery roads. The system works by always delivering a slight amount of torque to the rear wheels.There is no driver intervention; the system automatically decides how much torque to apply and it automatically delivers torque to the wheels that have the best traction .

Spacious and refined interior

As with the exterior design, Acadia ’s interior reflects refinement. Acadia offers three rows of seating, with the third row capable of comfortably seating adults while simultaneously providing generous storage space behind the third-row seat.

A carlike “low and away” instrument panel enhances the feeling of openness in the front-row seats and provides a commanding outward view.The instrument panel and other interior elements feature high-quality, low-gloss materials and tight gap tolerances.

Acadia can be configured for seven or eight passengers, including two front bucket seats, a 60/40-split second row bench (three passengers) or two second-row captain’s chairs (two passengers) and a 60/40-split third-row bench seat. Leather seats also are available.

GM’s exclusive Smart Slide feature is standard on all second-row configurations, allowing quick and easy access to the third-row seating area. The second-row seat cushion flips up while the seatback slides forward, effectively compressing the space occupied by the seat. It operates with one hand and enables adjustable fore/aft positioning of the second-row seat.

Safety

GMC Acadia is designed to protect passengers before, during and after a crash, with its 360-degree safety system. A strong structure is the foundation, and it is augmented by a wide stance and low center of gravity that reduces the likelihood of a rollover. Acadia ’s responsive four-wheel independent steering system also enhances safety by providing stable ride and handling characteristics.

Four-wheel antilock brakes are standard. Acadia ’s structure is reinforced in numerous areas with high strength steel, including a stiff steel cross-car beam welded across the floor between the B-pillars.

It also uses dual-phase steel in select areas, such as the lower engine compartment rails. Dual-phase steel is strengthened in the paint oven and offers easier formability, reduced mass, greater strength and better crash energy absorption than most high-strength steels.

Acadia is equipped with six standard air bags: two dual-stage frontal 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. The head curtain air bags are among the longest air bags in any production vehicle.

Complementing the air bags is GM’s rollover sensing system, which can preemptively activate the side-impact air bags if sensors determine a rollover is imminent.In the event of a rollover, the air bags stay inflated longer to provide increased occupant containment and because rollovers are typically longer than non-rollover crashes.

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