1) Titles that old are routinely screwed up.
2) Most states have methods to fix these problems, usually requiring inspection by a law enforcement officer or DMV employee to verify the problem.
3) There were no 55.1 GMCs, despite sharing the slight model changes with Chevy. All Z series trucks were considered 54s by GMC, leading to a rather insane 18 month-ish model year.
Judging by the shades of green on the dash and steering column, it's definitely a two-tone green interior. With the exterior trim bits, it's certainly a DeLuxe. Does it have a passenger-side inside sunvisor and evidence of a driver-side armrest? (they all got the plastic nuts, but yours should have evidence of screws having been installed)
The rear bumper looks like something from Barden.
Last edited by GMCpanel; 03/22/2012 6:16 AM.