OK. We didn't know it was a GMC. My sequence was for a Chevy. Pic was edited in later. There will be more letters in a GMC code. A ''Z'' could also mean 0 for 1970, besides Z for Fremont in the full VIN.
My '68 C/10 has a VIN of CS148Z123XXX. The Chevy Stepside's frame VIN is 8Z123XXX.
My '71 GMC Jimmy's VIN is KE114-S134XXX. The [-] dash is a GMC thing, It denotes special Pennsylvania-mandated equipment if there's a letter code, and a dash if none. The S is for St Louis, MO assembly. I guess the 1 after the S is for 1971. Funny, I could not find the frame VIN on the Jimmy. I've had that truck for 23 years, and I never noticed it didn't have one.
