they lead you to believe that, but there's so many holes in their guarantee that it's pathetic. The Sierra mentioned above was purchased and brought home from Alabama. When the damage was discovered the buyer arranged to return the truck, in the meantime he contacted CarFax with pictures and a full write up of what he found with the truck, not looking for any compensation, just for them to attach it to the file for that VIN# so no one else got stuck with it... CarFax rejected his request to attach the info he complied b/c he was not a body shop, police report or insurance company. That alone proves to me that they really don't care about how accurate their reports are, just as long as they can sell them.Aren't they guranteed to where if you do find something not reported they compensate you are something?