Sounds like something's stripped. I had *one* wiper quit on my 2002 Impala a couple of years ago (after almost 200,000 miles). Turned out I just needed to tighten the nut at the pivot point. First time in my life I had a wiper problem, other than just replacing the blades.
But if *both* wipers are not moving, it's either the motor or something common in the linkage to the motor that's loose, stripped, or broken. You should be able to tell by just looking at it while it's running.
2011 Equinox 1LT (dlvd. Jan 2011): Summit White / 3.0 L V6 / FWD / Pioneer Stereo / 18" Wheels / 142k miles [01-FEB-2020]
2002 Impala 1LT (dlvd. Jun 2002): Summit White / 3.4 L V6 / FWD / Cassette-CD Combo /228k miles [01-FEB-2020]