Mine doesn't have one. The first time the oil got changed, I let the dealer do it (free). I changed it the second time and noticed it did not have one. I am getting ready to change the oil again and I thought if it is supposed to have one I would buy one to put on it. I have been making sure it isn't leaking. Can I get one at Cummins shop or do I have to go to the dealer?
Thanks,
Eric