GM Service Manual Online
For 1990-2009 cars only

The check gages warning light will come on if the system senses high engine temperature, and a low or high engine oil pressure. If high engine temperature, low engine oil pressure or high engine oil pressure is detected, you will hear a tone alarm at two beats per second. The alarm and the light will remain on until the condition is fixed. If the engine temperature or oil pressure condition worsens, the tone alarm will go to five beats per second.

If the system senses low engine coolant, the five beat per second alarm and the low coolant warning light will come on.

The five beats per second tone alarm means that the engine will shut down in about 25 to 30 seconds. There is also an engine shutdown light to indicate that the engine will shut down. See Engine Shutdown Warning Light.

Pull off the road and shut off the engine. Do not start it until the reason for the problem is known, and the problem is fixed. If the engine shuts down when you are still in traffic, you can restart the engine and get another 25 to 30 seconds of operation. Do this only if you have to, since there is a problem that can harm the engine if it is not fixed. Engine automatic shutdown, for gasoline engines, requires activation by your dealer/retailer.

Notice: If you try to operate the vehicle after the engine automatically shuts down, you may damage the vehicle. Have the vehicle repaired as soon as possible.

Ambulance, Fire, and Rescue Packages

The check gages warning light will come on if the system senses high engine temperature or low engine oil pressure. If high engine temperature or low engine oil pressure is detected, you will also hear a tone alarm at two beats per second. The alarm and the light will remain on until the condition is fixed. If the engine temperature or oil pressure condition worsens, the tone alarm will go to five beats per second.

If the system senses low engine coolant, the five beat per second alarm and the low coolant warning light will come on.

The engine will not shutdown, but you should have the vehicle checked as soon as you can. See Check Gages Warning Lightfor more information.