Lost every Equinox key?
With no Equinox key left, the blade is milled from the VIN-matched key code, then the chip, remote or fob is programmed over the OBD port beside the car. On many of these years GM's security timer holds the tool for around ten minutes before it will add a key, so the visit runs longer than a spare-key call.
Expect the key price plus $60, so a 2014 flip key comes to $165 plus $60 and a 2019 fob to $229 plus $60. Keep the title or current registration nearby with a license whose name agrees. After the Equinox runs on the new key, the lost one is deleted from its memory and becomes useless to a finder.