Your best bet is to figure out what you cabinets are made of I oak you'll need an oak board if birch you can use a pine board and so on you will have to measure the gap along side the dishwasher just leaving a small gap all th way around so if you have to pull out the dishwasher you can say1/16" to 1/8" should do it. Now you will have to get stain to match your cabinets cut the board to fit stain it before you can install it pull out the dishwasher so you can nail the board you cut and stained in place Good Luck
