I realize this thread is old but since i just went through this exercise on my 2005 lacrosse i figured i would add my experience to changing the low beam bulbs..
You will need to remove the grill to access the headlight bulbs on a buick rainier. the grill is held on by plastic clips which will make removal simple.
How do i change the interior dome reading lamp light bulb in a buick lesabre?.
300 x 128 · 22 kB · png, 2001 Chevy S10 Blue Book
991 x 381 · 92 kB · jpeg, How do you replace a headlight bulb for a buick terazza?
Changing headlight bulbs buick lesabre..
Question - replace headlights 2007 buick lucerne - ro. find answer buick questions justanswer..
2003 buick lesabre question: replace front turn signal bulb?.
Question - buick lacrosse cxl change beam headlight - jw. find answer buick questions justanswer..
Source: beams 2006 buick lacrosse wont work bulbs fuses replaced wont work. shannon, state checked.
Headlights tail brake lights questions including " replace brake light 1994 jeep cherokee" " reverse lights work".