[Bob B.]

Originally Posted by Rodent

I've always been interested in the cabs on these trucks. Really weird looking design, looks like a cross between a 67-72 and 73-87 C-series. Anyone got any information or history on the cabs used on these trucks?

Those cabs came out on the '66 models, They were GMC designed and built, and they were also used on GM medium duty 4500/5500/6500 'E' series trucks in addition to the larger GMC's. There were a few different versions of that cab, the main differences being the long-nose C/M versions having a flat firewall and the short nose versions having dog houses of varying sizes. The medium duty 'E' series trucks were replaced in the GMC lineup in 1970 by the Chevy mediums with their C/K style cab. In 1978 GMC introduced the Brigadier (Chevy Bruin) which used a redesigned version of this cab. The major changes were a larger windshield (still available in 1 or 2 piece design), a new steering column, and new fiberglass hoods. In 1987, GMC heavy truck operations were merged with Volvo's, and General Motors continued to build the Brigadier at Pontiac for WhiteGMC through the 1988 model year, possibly into 1989. That was the last use of that cab. Those cabs were pretty strong, all welded steel, but they did tend to rust like all steel cabs did back in the day. They were also one of the first to feature built in air conditioning as an option.