Raymond, I have found a few vins with the added 4 digits on the end of the original vin. Not sure how the 4 added would have been generated? Looks like we might be on our own.
I have the same issue.
138571L130153 71 SS Antique Green Automatic Green interior. I have struggled with getting any information with 13 vs 17 vin. Please let me know if you figure something out! I have all trade in ppwk and notarized odometer statement etc..