Today, I had the first flat tire on my 2001 2500 4wd quad cab. As I removed the jack from under the back seat, I noticed it was labeled for use with a "1500" truck. As it turns out, the jack did not have the range necessary to lift the tire off the ground! I would strongly suggest everyone check the jack in their trucks to make sure they weren't short-changed as I was. Needless to say, I'm going to the dealer tomorrow.