Hello Dave and thank you for your question.
The required installation clearance for the sides of the LG Electronics 19.7 cu. ft. French Door Refrigerator is 1/8 inch. The width with the door open 90° (with handles) is 32-3/8 inches. You will need a minimum of 32-5/8 inches opening (32-3/8 + 1/8 + 1/8). You should have a close fit inside your 33 inch opening. Check that the opening is 33 inches at the top, middle, and bottom of this space for best fit.
The required installation clearance for the back of the LG Electronics 19.7 cu. ft. French Door Refrigerator is 1 inch and the depth with handles is 33-3/8 inches; this is 43-3/8 inches. Your refrigerator should extend 16-7/8 inches beyond the countertop (43-3/8 – 26-1/2).
Other dimensions can be found on the specification sheet located here: http://www.homedepot.com/catalog/pd...
Best wishes on your project.