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Motorweek - 1987 Hummer H3 25-6 was released on:
USA: 14 October 2005
6 quarts
welll it depends on the hummer u get. a humme h2 sits 7 but very un-comfortabley. and the h3 can sit 5-6 depends on the model.
6 quarts according to my manual 5w-30
188 inches or 15 ft 6 inches