2011 Buick LaCrosse Owner's Manual - Page 135

Instruments and Controls 5-13 Engine Coolant Temperature Gauge If the gauge pointer moves toward the shaded area, the engine is too hot. This reading indicates the same thing as the warning light. It means that the engine coolant has overheated. If the vehicle has been operating under normal driving conditions, pull off the road, stop the vehicle, and turn off the engine as soon as possible. See Engine Overheating on page 10‑21 for more information. Metric English This gauge shows the engine coolant temperature.