The thirteen digit vehicle identification number is stamped on the plate mounted to the left top of the dashboard, visible through the windshield. This number also can be found on a non-removable safety sticker on the rear of the left front door.
Please note: the VIN AND ENGINE CODE LETTER ARE NOT ALWAYS THE SAME!! For some, the engine plant code and VIN code are different. - Provided courtesy AMCHornet.com visitor MSgt Frank Swygert, 436 CES/CECM (MilCon)