The commodious interior is accessible via power-operated doors that open a full 90 degrees. The side windows open fully too, as does the Buick's 1,092 mm (43 in) wide by 940 mm (37 in) long power-operated glass sunroof. From a single voice command this sunroof drops downward slightly and slides rearward, after which the rear window and trunk lid assembly glides forward 940 mm (37 in) into the space vacated by the sunroof. Then another glass panel rises vertically from its rear-seatback storage compartment to seal off the rear passenger area. Voila, a 1,016 mm (40 in) square open pickup bed is unfurled. To extend the bed another 1,422 mm (56 in) further for a total of 2,438 mm (96 in), the sunroof slides forward and underneath a panel as the rear seatback folds down. A hinged panel spans the gap between the base of the trunk and the seatback. Additionally, secure storage is available in a 144 L (5.1 cu ft) compartment under the floor. Incidentally, if you only need to transport smaller items a 283 L (10.0 cu ft) trunk is available when in sedan form.
Buick followed the less is more philosophy when designing the interior, resulting in a particularly clean look. Gauges and instruments are initially invisible, except for an elegant analog clock at the dash's center. Dave Lyon, Buick's 32 year old brand character chief designer described the LaCrosse's interior as not only one of the roomiest Buick passenger compartments, but also one of the most inviting that the brand has ever designed, thanks largely to his interior designer, Yuntae Kim.
"LaCrosse's interior purposely eliminates most of the complication and distraction associated with today's driving experience," commented Lyon. "We've created a simple, open layout with a 'club chair' seating theme and an instrument panel that reinforces the form and beauty of the exterior. Advanced technology that's nearly ready for production allowed us to eliminate the usual clutter of dials, knobs, switches, and readouts. The net result is a quiet, comfortable sanctuary for the road."