I'm replacing the rear brakes on my 05 Impala, and I have messed up bad. I took of the rotors to have them refaced, but when I went to put them back on, it seems that my caliper pins are 2 different types. One is smooth with the threads on the end, the other has a small rubber seal at the end of it. I didn't even notice when I removed them or I would have seen which one came from which hole. Any help would be GREATLY appreicated. The wife has to work in the morning, and this is not something I want to chance to guessing which one goes where. Thanks guys!