It seems pretty clear to me where it says this:
“INSTRUCTIONS FOR: 2015-2020 Tahoe, Suburban, Yukon, and Yukon XL, 2015-2021 Silverado and Sierra 1500/2500HD/3500HD, 2010-2017 Equinox, 2014 Silverado & Sierra 1500,
2010-2016 GMC Terrain”
In other words they’re the same. I know it’s in that location for all the years leading up to the ‘15-20, almost positive they didn’t change. You can shine a flashlight up there and look for the multi colored plugs, there’s about 6 of them that plug into it. Might have to pull the knee bolster to see but that should be simple.