is there a trick to remove a dishwasher?

Power off at the breaker and water off at the valve under the sink first. Then pull the kick plate off the bottom. Behind it you'll find the water supply line (have a bowl and towels ready, it dribbles), and a small junction box where the power connects, or a plug under the sink on some. The drain hose comes off at the sink trap or the disposal. Then undo the two brackets screwed up into the underside of the counter. The trick: wind the front feet up a bit before you slide it out, and if the floor was tiled up to the unit it can jam under the counter on the way out. Feed the hoses through the cabinet as you pull.