Where is the 2013 chevy equinox oil pressure sensor located?

You'll find the 2013 Chevrolet Equinox oil pressure sensor on the 3.6L V6 threaded in below where Your oil filter is, as You're looking from the underside. It's going to be between the oil filter and the oil pan. You can pick up a new switch for about $20 from Autozone. Labor costs can run from $75 to $100 if You have someone else replace it. Given that it's pretty much a unscrew one, screw in another, it's likely a job You can tackle Yourself without untoward difficulty. Signs that the sensor is going bad will typically be inaccurate readings, which then trigger a warning light, which is probably why You're looking for it in the first place.