MY service airbag light came on driving down the highway the other day, so I brought it into the dealer an they said it was my front right wheel bearing but had no code!?!?! They said they needed more time. I just replaced that whole hub assembly an I made sure the connections were tight and in place. I tried to disconnect my battery over night an see if that would erase anything. When I got in my truck the next morning an re-connected the battery cable's the code was still there an nothing reset, not even my radio stations or anything.???? how long is the memory on these trucks?