It depends where they were made and on the year.

On my '46, The Canadian built GMC's shared the driveline with the Chevy's, but the American built GMC's had a different engine completely. Many small parts were different, much more than you would think. Many interchange though. There's no one answer, depends on the year.


1946 GMC Pickup - S-10 Frame, 455 Buick, TH400, original patina.

My 46 GMC on Photobucket