GM Service Manual Online
For 1990-2009 cars only

United States


Object Number: 822627  Size: A3

Canada


Object Number: 822628  Size: A3

This gage shows the engine coolant temperature. If the gage pointer moves into the shaded warning zone, your engine is hot.

To prevent engine overheating, the air conditioning compressor will turn off automatically, a fast-pulsed chime will sound, and the message ENGINE HOT...A/C OFF will appear in the Driver Information Center (DIC). As the engine cools down, the air conditioning compressor will automatically turn back on.

If the coolant temperature is over 262°F (128°C), the message HOT...IDLE ENGINE will appear. It means you should reduce the engine load and speed to prevent the engine from overheating.

If the coolant temperature is over 268°F (131°C), the message HOT...STOP ENGINE will appear. It means that your engine coolant has overheated. You should pull off the road, stop your vehicle and turn off the engine as soon as possible.

Your vehicle is equipped with an Overheated Engine Protection Operating Mode. See Engine Overheating for more information.

If your coolant level is low, the message LOW ENGINE COOLANT will appear on the Driver Information Center. Check your coolant level as soon as possible. See Engine Coolant .