PIctures inside the books of existing dealerships show mostly 1973 and 1974 truck models, so the book was probably used for setting up dealerships around 1974-1975.
1974 GMC C15/C1500 Pickup
1974 GMC C15/C1500 Suburban
1974 GMC C25/C2500 Pickup
1974 GMC C25/C2500 Suburban
1974 GMC C35/C3500 Pickup
1974 GMC G15/G1500 Van Rally
1974 GMC G15/G1500 Van Vandura
1974 GMC G25/G2500 Van Rally
1974 GMC G25/G2500 Van Vandura
1974 GMC G35/G3500 Van
1974 GMC G35/G3500 Van Rally
1974 GMC G35/G3500 Van Vandura
1974 GMC Jimmy
1974 GMC K15/K1500 Pickup
1974 GMC K15/K1500 Suburban
1974 GMC K25/K2500 Pickup
1974 GMC K25/K2500 Suburban
1974 GMC K35/K3500 Pickup
1974 GMC P15/P1500 Van
1974 GMC P25/P2500 Van
1974 GMC P35/P3500 Van
1974 GMC P35/P3500 Van Motor Home
1974 GMC Sprint
1974 GMC Sprint Custom
1974-1975 GMC Astro 95
1974-1975 GMC Motorhome Chassis
1974-1975 GMC Series 4500-6500
1974-1975 GMC Series 7500-9500
1974-1975 GMC Transmode Motorhome
1975 GMC C15 Cab & Chassis 2-Door
1975 GMC C15 High Sierra Cab & Chassis 2-Door
1975 GMC C15 High Sierra Standard Cab Pickup 2-Door
1975 GMC C15 Sierra Classic Cab & Chassis 2-Door
1975 GMC C15 Sierra Classic Standard Cab Pickup 2-Door
1975 GMC C15 Sierra Grande Cab & Chassis 2-Door
1975 GMC C15 Sierra Grande Standard Cab Pickup 2-Door
1975 GMC C15 Standard Cab Pickup 2-Door
1975 GMC C15 Suburban High Sierra Sport Utility 4-Door
1975 GMC C15 Suburban Sierra Classic Sport Utility 4-Door
1975 GMC C15 Suburban Sierra Grande Sport Utility 4-Door
1975 GMC C15 Suburban Sport Utility 4-Door
1975 GMC C25 Cab & Chassis 2-Door
1975 GMC C25 Cab & Chassis 4-Door
1975 GMC C25 Crew Cab Pickup 4-Door
1975 GMC C25 Extended Cab Pickup 2-Door
1975 GMC C25 High Sierra Cab & Chassis 2-Door
1975 GMC C25 High Sierra Cab & Chassis 4-Door
1975 GMC C25 High Sierra Crew Cab Pickup 4-Door
1975 GMC C25 High Sierra Extended Cab Pickup 2-Door
1975 GMC C25 High Sierra Standard Cab Pickup 2-Door
1975 GMC C25 Sierra Classic Cab & Chassis 2-Door
1975 GMC C25 Sierra Classic Cab & Chassis 4-Door
1975 GMC C25 Sierra Classic Crew Cab Pickup 4-Door
1975 GMC C25 Sierra Classic Extended Cab Pickup 2-Door
1975 GMC C25 Sierra Classic Standard Cab Pickup 2-Door
1975 GMC C25 Sierra Grande Cab & Chassis 2-Door
1975 GMC C25 Sierra Grande Cab & Chassis 4-Door
1975 GMC C25 Sierra Grande Crew Cab Pickup 4-Door
1975 GMC C25 Sierra Grande Extended Cab Pickup 2-Door
1975 GMC C25 Sierra Grande Standard Cab Pickup 2-Door
1975 GMC C25 Standard Cab Pickup 2-Door
1975 GMC C25 Suburban High Sierra Sport Utility 4-Door
1975 GMC C25 Suburban Sierra Classic Sport Utility 4-Door
1975 GMC C25 Suburban Sierra Grande Sport Utility 4-Door
1975 GMC C25 Suburban Sport Utility 4-Door
1975 GMC C35 Cab & Chassis 2-Door
1975 GMC C35 Cab & Chassis 4-Door
1975 GMC C35 Crew Cab Pickup 4-Door
1975 GMC C35 High Sierra Cab & Chassis 2-Door
1975 GMC C35 High Sierra Cab & Chassis 4-Door
1975 GMC C35 High Sierra Crew Cab Pickup 4-Door
1975 GMC C35 High Sierra Standard Cab Pickup 2-Door
1975 GMC C35 Sierra Classic Cab & Chassis 2-Door
1975 GMC C35 Sierra Classic Cab & Chassis 4-Door
1975 GMC C35 Sierra Classic Crew Cab Pickup 4-Door
1975 GMC C35 Sierra Classic Standard Cab Pickup 2-Door
1975 GMC C35 Sierra Grande Cab & Chassis 2-Door
1975 GMC C35 Sierra Grande Cab & Chassis 4-Door
1975 GMC C35 Sierra Grande Crew Cab Pickup 4-Door
1975 GMC C35 Sierra Grande Standard Cab Pickup 2-Door
1975 GMC C35 Standard Cab Pickup 2-Door
1975 GMC G15 Rally Extended Passenger Van 3-Door
1975 GMC G15 Rally Standard Passenger Van 3-Door
1975 GMC G15 Rally STX Extended Passenger Van 3-Door
1975 GMC G15 Vandura Extended Cargo Van 3-Door
1975 GMC G15 Vandura Standard Cargo Van 3-Door
1975 GMC G25 Rally Extended Passenger Van 3-Door
1975 GMC G25 Rally Standard Passenger Van 3-Door
1975 GMC G25 Rally STX Extended Passenger Van 3-Door
1975 GMC G25 Vandura Extended Cargo Van 3-Door
1975 GMC G25 Vandura Standard Cargo Van 3-Door
1975 GMC G35 Magnavan Cutaway Van 2-Door
1975 GMC G35 Rally Camper Special Cutaway Van 2-Door
1975 GMC G35 Rally Standard Passenger Van 3-Door
1975 GMC G35 Rally STX Standard Passenger Van 3-Door
1975 GMC G35 Vandura Extended Cargo Van 3-Door
1975 GMC G35 Vandura Special Cutaway Van 2-Door
1975 GMC G35 Vandura Standard Cargo Van 3-Door
1975 GMC Jimmy High Sierra Sport Utility 2-Door
1975 GMC Jimmy Sierra Classic Sport Utility 2-Door
1975 GMC Jimmy Sierra Grande Sport Utility 2-Door
1975 GMC Jimmy Sport Utility 2-Door
1975 GMC K15 Cab & Chassis 2-Door
1975 GMC K15 High Sierra Cab & Chassis 2-Door
1975 GMC K15 High Sierra Standard Cab Pickup 2-Door
1975 GMC K15 Sierra Classic Cab & Chassis 2-Door
1975 GMC K15 Sierra Classic Standard Cab Pickup 2-Door
1975 GMC K15 Sierra Grande Cab & Chassis 2-Door
1975 GMC K15 Sierra Grande Standard Cab Pickup 2-Door
1975 GMC K15 Standard Cab Pickup 2-Door
1975 GMC K15 Suburban High Sierra Sport Utility 4-Door
1975 GMC K15 Suburban Sierra Classic Sport Utility 4-Door
1975 GMC K15 Suburban Sierra Grande Sport Utility 4-Door
1975 GMC K15 Suburban Sport Utility 4-Door
1975 GMC K25 Cab & Chassis 2-Door
1975 GMC K25 Extended Cab Pickup 2-Door
1975 GMC K25 High Sierra Cab & Chassis 2-Door
1975 GMC K25 High Sierra Standard Cab Pickup 2-Door
1975 GMC K25 Sierra Classic Cab & Chassis 2-Door
1975 GMC K25 Sierra Classic Standard Cab Pickup 2-Door
1975 GMC K25 Sierra Grande Cab & Chassis 2-Door
1975 GMC K25 Sierra Grande Standard Cab Pickup 2-Door
1975 GMC K25 Standard Cab Pickup 2-Door
1975 GMC K25 Suburban High Sierra Sport Utility 4-Door
1975 GMC K25 Suburban Sierra Classic Sport Utility 4-Door
1975 GMC K25 Suburban Sierra Grande Sport Utility 4-Door
1975 GMC K25 Suburban Sport Utility 4-Door
1975 GMC P15 Stripped Chassis 0-Door
1975 GMC P15 Value Van Standard Cargo Van 2-Door
1975 GMC P25 Stripped Chassis 0-Door
1975 GMC P25 Value Van Standard Cargo Van 2-Door
1975 GMC P35 Stripped Chassis 0-Door
1975 GMC P35 Value Van Standard Cargo Van 2-Door
1975 GMC Sprint Classic Standard Cab Pickup 2-Door
1975 GMC Sprint High Sierra Standard Cab Pickup 2-Door
1975 GMC Sprint SP Standard Cab Pickup 2-Door
1975 GMC Sprint Standard Cab Pickup 2-Door
1974 1975 GMC Astro 95 1974 1975 GMC C15 1974 1975 GMC C15 Suburban 1974 1975 GMC C15/C1500 Pickup 1974 1975 GMC C15/C1500 Suburban 1974 1975 GMC C25 1974 1975 GMC C25 Suburban 1974 1975 GMC C25/C2500 Pickup 1974 1975 GMC C25/C2500 Suburban 1974 1975 GMC C35 1974 1975 GMC C35/C3500 Pickup 1974 1975 GMC G15 1974 1975 GMC G15/G1500 Van 1974 1975 GMC G25 1974 1975 GMC G25/G2500 Van 1974 1975 GMC G35 1974 1975 GMC G35/G3500 Van 1974 1975 GMC Jimmy 1974 1975 GMC K15 1974 1975 GMC K15 Suburban 1974 1975 GMC K15/K1500 Pickup 1974 1975 GMC K15/K1500 Suburban 1974 1975 GMC K25 1974 1975 GMC K25 Suburban 1974 1975 GMC K25/K2500 Pickup 1974 1975 GMC K25/K2500 Suburban 1974 1975 GMC K35/K3500 Pickup 1974 1975 GMC Motorhome Chassis 1974 1975 GMC P15 1974 1975 GMC P15/P1500 Van 1974 1975 GMC P25 1974 1975 GMC P25/P2500 Van 1974 1975 GMC P35 1974 1975 GMC P35/P3500 Van 1974 1975 GMC Series 4500-6500 1974 1975 GMC Series 7500-9500 1974 1975 GMC Sprint 1974 1975 GMC Transmode Motorhome