I thought that was too good to be true also so I bought one in the spring and I have to say it works just fine. I was amazed that at the price point it would even fit let alone work.
I was even more leery when I saw the rib pattern as it was totally different from the G/Yr belt that I bought at a local chevy parts counter back in 05, and again in 07.....I was sure I had been taken for a ride but it fits & operates perfectly!
Tom