There were indeed several print runs of the Operator's Manual 2½ Ton 6x6 GMC (Canadian), which makes sense as the fleet was very big and they were handed out during driver training. I believe the light buff coloured cover version was the final print edition of this manual. I have yet to find one in French.
Regarding the M62 5 ton Wrecker, they were introduced in 1953; the earliest vehicles were Korean War vintage machines that had been shipped back to Canada following the end of hostilities.