equinox starting
#2
If the starter doesn't engage when attempting to start it manually, then your battery is probably bad. This of course is with the assumption that all connections are good. Most people don't realize that the starter requires two or three times more power than everything else combined, and subsequently assume the battery is fine when it is not.
You can get a jump start and drive somewhere to have the battery & alternator tested.
The starter could be bad, but that's far less likely than a bad battery.