Mine were OEM as well, but I have no idea how many times the dealer (or any other shop) might have pulled the cables to clear codes, or disconnected the batteries for a repair, or even just decided to "make sure they were tight" (I bought the truck used.....we all know how "previous owners" are ;-)
Keith Thanks for the responses, Keith, Regarding the overtightening of the Delco battery posts I can buy into that but 2 were OEM untouched by anyone else and the the other was done by the dealer. Regardless I will look into the lock washer issue.
