GM Service Manual Online
For 1990-2009 cars only

United States


Object Number: 830017  Size: A2

Canada


Object Number: 830018  Size: A2

The engine oil pressure gage, on the lower right portion of your instrument panel cluster, shows engine oil pressure in psi (pounds per square inch) or in kPa (kilopascals). Oil pressure may vary with outside temperature and oil viscosity, but readings of 30 to 40 psi (205 to 275 kPa) on gasoline engines at operating temperature and moderate road speeds are normal. If you have a diesel engine, the normal operating range should be between 35 and 70 psi (240 to 480 kPa).

A reading in the low pressure zone may be caused by a dangerously low oil level or other problem.

If you have a Caterpillar® diesel engine, also see your Caterpillar® Operation & Maintenance Manual.

Caution: Do not keep driving if the oil pressure is low. The engine can become so hot that it catches fire. Someone could be burned. Check the oil as soon as possible and have the vehicle serviced.

Notice: Lack of proper engine oil maintenance can damage the engine. The repairs would not be covered by the vehicle warranty. Always follow the maintenance schedule in this manual for changing engine oil.