sentences:  Chevrolet offered the Bruin in 70, 80, and 90-series.While tilting-hood examples are nearly identical between brands, butterfly-hood versions are distinguished by their headlight configurations (Bruins have two headlights; Brigadiers have four).The Chevrolet Bruin/GMC Brigadier carried over the H/J 9500 cab introduced in 1966, but with a number of changes.