» CUCV Technical Info » Motor Mayhem 1987 m1008 diesel ! The guy l bought it from says 6 quarts of oil , the dipswich even has the full mark at 6 qu arts . Everything l read on the computer says 8 quarts . PDF copies of 67-72 GM truck Service Manuals - The 1947 67-72chevytrucks›47 - Current classic GM TrucksDec 07, 2018I usually post on the 73-87 side but I have collected copies of most of the 67-72 light truck service literature. PDF scans of 1967-1972 GMC and Chevrolet Light 10-30, Medium 40-60, and Heavy 70-90 Truck Service Manuals from my library.