Serial Number Examples: Pre 2001, 8 digits: 3CL12345 2001 and up, 17 digits: CAT0962GR4PW00533. VIN Number Location: Left (highway side) of the machine behind the front tire. On Pre 2001 machines, there will be an 8 digit VIN stamped in close to the VIN plate. On older 60's, & 70's machines the VIN plate is attached on right (curb) side of ...