Pontiac engines were available in GMC trucks from 1955 onwards (New Design GMC trucks)

older GMC engines (1955 Z-series and earlier) GMC trucks:
GMC 228, 248, 279, 302 (6-cylinder engines) were not Pontiac engines.
[/quote]


And to add to that: in 1960 the standard engine in the pickups was the GMC 305 V6, this was not a pontiac engine, and believe from 1960 and up never another pontiac engine came down the line in a GMC, although later they offered chevrolet engines in GMCs

Last edited by sstock; 02/28/2020 10:50 PM.
1953 Chevrolet 3100
261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
In the DITY Gallery
Video of the 261 running

1964 GMC 1000
305 Big Block V6, sm420, the next cab off restoration