Sleds are a conditioning tool, accessory to a solid training program. Paired with the right kind of diet, sure you'll get ripped. Paired with a shit diet, you'll still be fat, but better at pushing/pulling sleds.
I swear exercise equipment infomercials have fucked this world in the ass instilling this mentality that getting ripped is in the product. It yields nonsensical questions like this. People have gotten lean while using sleds in their training, but nobody has gotten ripped from using sleds. You get ripped from a lifestyle change.