Turbo Boost Gauge: Description and Operation

BUICK W/V6-231 (3.8L) TURBOCHARGED ENGINE
Century, Regal and Riviera models utilize two lights located in the lower right hand gauge area. The yellow light indicates moderate acceleration and the orange light indicates power or heavy acceleration. When neither light is illuminated, the indication visible is a green paint band signifying economy. LeSabre models utilize three lights located at the bottom of the fuel gauge. On light acceleration or cruising, a green light indicates economy. Moderate acceleration activates a yellow indicator light. The orange light is activated during heavy acceleration.