Do you have to pay for myChevrolet app?
The vehicle access features of myChevrolet require an active OnStar plan — whether it's the free Basic Plan or one of the paid subscriptions. It also requires the user to download the app, create an OnStar user ID and password, and log into myChevrolet. via
How much is a starter for a Chevy Sonic?
The average cost for a Chevrolet Sonic starter replacement is between $406 and $543. Labor costs are estimated between $88 and $111 while parts are priced between $318 and $432. via
How do you change the battery in a 2015 Chevy Sonic? (video)