I also have a 2013 Chevy short bed. Have used the Pullrite Superglide for the last 6yrs on two different 5ers. Love it. Highly recommended. I know some say it’s not needed IF you’re careful. I agree, it’s not needed UNTIL it is. I know a few people that have punched out rear windows when they weren’t that careful just once.
Just two days ago I had to make a tight turn on a turnout I mistakenly took. Looked back at corner of 5er a couple inches from truck window (2019 VL 5er has rounded corners etc) and was VERY glad I had Pullrite, and that it did it’s job automatically.
If I end up with another SB truck in a few years, it will also have a Pullrite installed.