Why do you need to descend to 2,000’? If ATC directed the miss, they should assign an altitude, which likely be 3,000’ or higher. This is a time to hand fly and sort out the automatics later. If you need to go to 2,000, select NAV and V/S to continue down 2,000, then do as FLEX JET says. You don’t want to use GA, as you’ll sequence the FMS, but create other problems.
GF