[frenchy51]

I'm looking at a local GMC 1977 for sale and I'm having trouble decoding the serial number. It's TCL447Z52XXXX Which I believe is a 1977 2wd 350 4bbl 1/2 ton? It has 5 lug wheels. Model # is TC10903. It is loaded and has original 2 tone paint with YE9 Silverado Equipment but it's a GMC with SierraClassic 15 fender emblems. Was "Silverado" terminology used for Chevy and GMC? Am I correct on it being a 1977? Am I correct on the serial number decode? Thanks