Truckzilla
"Truckzilla" is the pet name given by fans to John's truck. It was first coined by LJ user disanddat in a thread in the papawinchester LJ community on the 31 of March 2006. Full thread here
The input for the name came from a TWOP's Supernatural episode recap of Shadow in which "...Daddy walks off to get in his Truckosaurus Metallitruck."
When the truck used in production was being sold, it was described as:
"It is a 1981 GMC 4x4 short box step side.The motor is a 350,hp (strong running),auto trans. The suspension has a lift kit and has stainless exhaust. A new b&m shifter was installed and has tilt, sliding rear window and a cd player. There is a weapons stash under a false floor and is all automatic with a flick of a switch (there are no weapons included). The trans has a oil leak but works well." (Source)
