Just passed 7 years of battery service on my 2013, wife's 2013 Equinox battery is still running fine too, it will be 7 in July. Now that I've said this, watch, I'll have battery issues.
They usually go at the most inopportune moment. Like when you have to stop for gas at 2:00AM in a sketchy part of town or your home AC dies on July 4th at 12:00 Noon and it will also be a long weekend.