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 your 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 your engine and emission controls.
   • Aftermarket diesel fuel additives are not tested by General Motors. Some additives, particularly those which contain alcohol or water emulsifiers, may damage your fuel system. If you believe that unique circumstances call for a fuel additive to be used, consult your dealer for advice.
   • If you ever run out of diesel fuel, it can be difficult to restart your engine. To avoid this, never let your 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 your engine.