I too want to trade in for a Bolt.
My current 2012 Rav4 EV purchased on 2013 April with 0% 60 month + $10000 discount from Toyota at the time. Monthly payment is around $760 and still have 16 months to go. It have 82,000 miles on it now and went through two motors. I cannot tell the difference in drive range with or without "extended range" on this battery already.
2nd motor was replaced @ 72,000 miles (past 60,000 miles warranty). After the car sit in the dealer service for a month and a few angry email to Toyota HQ, they replace this motor as "good faith" without charge. This motor carries 12,000 mile warranty which means it will expire @ 84,000 miles. If this motor breaks again, it will cost around $12k-$16k on parts.
KBB trade in value for this car is around $11-$12k and currently still have $12k on the balance. If the motor breaks again, it might worth a few grand as someone's pet project.
For a fully loaded Premier model ($44k) with 2.9% from GM financing and this car traded-in with break even, it will be around $787 a month for 60 months assuming $0 down in GM calculator.
Math tells me it make sense for me to move on.