2009 GMC Savana Van Owner's Manual - Page 151

StabiliTrak® Indicator Light For vehicles with the StabiliTrak® system, this light comes on or flashes, according to the description table for the StabiliTrak system. Engine Coolant Temperature Gage For more information, see StabiliTrak® System on page 4-6. Three chimes sound if the light turns on and one chime if the light turns off. If this light remains on steady, the vehicle needs to be taken in for service. United States Canada This gage shows the engine coolant temperature. It also provides an indicator of how hard the vehicle is working. During a majority of the operation, the gage will read 210°F (100°C) or less. If the vehicle is pulling a load or going up hills, it is normal for the temperature to fluctuate and approach the 250°F (122°C) mark. If the gage reaches the 260°F (125°C) mark, it indicates that the cooling system is working beyond its capacity. See Engine Overheating on page 5-31. 3-33