Not really that difficult as it looks. I've done this a few times before. I don't own the car or have an access to one, so this is just based on what I can remember.
Take off a black plastic cover by removing 2 nylon inserts. Remove couple of 10mm screws. Slide a plastic clip. Move the headlight around a little, and pull the headlight forward and upward. Bending the part of the bumper cover doesn't damage the paint or the cover, but might crack the paint if it's been repainted. I can usually do this in 5 minutes or less.
Changing a headlight bulb in a 2007 Buick Lacrosse can be done easily. Just remove the cover piece and change the bulb.
The 2007 Buick LaCrosse has a V6 engine.
The 2007 Buick LaCrosse has 12 valves.
The 2007 Buick LaCrosse has a 4-speed automatic.
The 2007 Buick LaCrosse has overhead valves (OHV).
The 2007 Buick LaCrosse is a gas-powered vehicle.
The 2007 Buick LaCrosse's turning circle is 40.4 ft..
The 2007 Buick LaCrosse runs on regular unleaded.
The curb weight of the 2007 Buick LaCrosse is 3495 lbs..
The 2007 Buick LaCrosse is 16 ft. 6.1 in. (198.1 in.) long.
The height of the 2007 Buick LaCrosse is 4 ft. 9.4 in. (57.4 in.).
The 2007 Buick LaCrosse has 39.4 in. of front head room.