What type dump trucks did GMC make during the years 1967-72?

During the years 1967-1972, GMC manufactured several types of dump trucks. Some of the popular ones during this period were:

1. GMC C/K Series: This series included the C1500, C2500, C3500, K1500, K2500, and K3500 models. These were medium or heavy-duty trucks that were often used as dump trucks.

2. GMC Astro: The Astro series included heavy-duty trucks designed for various applications, including dump truck configurations.

3. GMC Brigadier: The Brigadier series consisted of medium and heavy-duty trucks, some of which were available as dump trucks.

4. GMC General: The General series was comprised of heavy-duty trucks used for a wide range of applications, including dump truck configurations.

Please note that there may have been other models or variations available during that time period, as GMC offered a diverse lineup of trucks.