Re: HELP I CAN'T GET MY KEY OUT!
Had a similar problem on my '98 Grand Am, could not remove the key despite the vehicle being in Park. Apparently a BTSI solenoid stopped working and the vehicle did not know when it was in park, therefore it would not allow the key to be removed.
Under the steering column was a cap (like a battery cover on a remote) with a little button to push which would bypass the lock on the ignition, and let me turn the key. I used this for years and it became second nature when removing the key so much that I would reach under the steering column to do this in other vehicles I drove.
Never bothered to look if there was anything similar int he Acadia, apparently GM had this little bypass switch in a lot of their vehicles of that age.
05/12/2011 : 2011 JEEP PATRIOT 4X4 LTD, FD-II, CVT OFF ROAD, MEDIA CENTER 430N, BLACKBERRY w/DK. SLATE LEATHER<br />04/21/2009 : 2007 ACADIA SLT2 AWD, BLUE w/LT. TITANIUM LEATHER, NAV, XM, DVD, SUNROOF, 19", TOW, HUD