GM Service Manual Online
For 1990-2009 cars only

For the Caterpillar® diesel, see the Caterpillar® Operation & Maintenance Manual for information concerning fuel usage.

Notice: Diesel fuel or fuel additives not recommended in this manual could damage the fuel system and engine. Your warranty would not cover this damage. And:

   • Diesel fuel that has been mixed with engine oil or automatic transmission fluid could damage the engine and emission controls.
   • We do not test aftermarket diesel fuel additives. Some additives, particularly those which contain alcohol or water emulsifiers, could damage the fuel system. If you believe that unique circumstances call for a fuel additive to be used, consult your dealer/retailer for advice.
   • If you ever run out of diesel fuel, it can be difficult to restart the engine. To avoid this, never let the tank get empty.
If gasoline is ever accidentally added to the fuel tank, to avoid severe engine damage, do not run the engine until the fuel tank can be drained.

If you run out of fuel, Running Out of Fuel tells you how to restart the engine.