My neighbor just got a Acadia, so far they really like it.
here is engine spec's I looked up for him
Type:3.6L V-6
Displacement (cu in / cc): 217 / 3564
Bore & Stroke (in / mm):3.70 x 3.37 / 94 x 85.6
Block material:aluminum
Cylinder head material:aluminum
Valvetrain
OHC; 4 valves per cylinder; variable valve timing
Fuel delivery:sequential fuel injection
Compression ratio:10.2:1
Horsepower (hp / kW):275 / 205 @ 6600*
Torque (lb-ft / Nm):251 / 340 @ 3200*
Recommended fuel:regular unleaded
Max. engine rpm (fuel cutoff):6900 rpm
Emissions controls:dual close-coupled converters; 2 pre- and 2-post oxygen sensors