Earlier this month I purchased a 2012 Silverado Duramax 4x4 truck. When I got home I started reading the owners manual. I quickly noticed as I read that it referred me to the Duramax owners manual supplement. I checked all around and I did not have one. When I e-mailed the dealership about the owners manual supplement at first they thought i was asking about some kind of fluid. :shocked: FInally on the third e-mail I "THINK" they got what I was asking and repled that the 2012s did not have them. Now why would a owners manual refer to you a Duramax Owners Manual Supplement if there was not one? Is there anyone else out there with a 2012 Silverado Duramax and do you have the supplement? If you have one PLEASE reply and state so, even better would be if you reply with a picture of yours just so I can share it with Chevrolet. (I called another dealership and they said my truck should have one. They told me if the dealership I purchased it from would not give me one to call customer service and get them involved. WOW, I am VERY unimpressed by customer service. I could immediately tell I was speaking to someone with a language barrier and figured out they were in the Phillipines (I trained some people from the Phillipines to take my job when I worked for Lexmark). They took a while to get them to understand what I needed. And then instead of being able to followup with Chevrolet all they did was call the dealership that told me there was not a Duramax manaul and they took their word for it. WTF! (Same dealership that said my truck didn't have the heater cord and it did) Very frustrated. Still liking my truck thus far though. I would feel a LOT better if I had a the duramax manual though since I have had all Dodge Diesels since 2002.