the CDN numbers look to be just production serial number, but someone might know what the FC paint code is - it would appear to be a 48 from the Holden number - I think GM Canada did the buildup, just adding basic sequence numbering, and sent them off to Holden for finishing - as a big bolt it prolly was shipped as cab/chassis
'bolt group in Tonga? pope a closet GM fan?

just never know where the ol info hiway gets to!
Bill