I just did this on my 2013 Summit. I just used the wife's hair dryer and with some patience you can gently peel the heaters and the cork off the old bars. Take note to the way they used electric tape to hold the ends of the heaters on as well as seal the bar-end. Use an air compressor and a blower nozzle on the hole in the end of your grips and they will pop right off. Use the same method to put the old grips back on, but it's quite a push so have a buddy or use a vice or something to hold the new bars as you press the grips back onto your bars while simultaneously blasting compressed air through the grips. These grips are to go on dry with no glue.
Oh and the pins do remove nicely out of the electric plug under the bar pad once you know how they work. Lift the hatch by releasing the latches on each side, then under the pin you are releasing just press a very small flat screwdriver under the pin and lift as you gently pull the wire out. I found a youtube video that showed how they are held in. its a little finicky until you do it once.
Hope this helps!