Buick 2004 Rainier - Manual (Page 317)

Add coolant mixture at the recovery tank, but be careful
not to spill it.
{ CAUTION:
You can be burned if you spill coolant on hot
engine parts. Coolant contains ethylene glycol,
and it will burn if the engine parts are hot
enough. Do not spill coolant on a hot engine.
Occasionally check the coolant level in the radiator.
For information on how to add coolant to the radiator,
see Cooling System on page 5-32.
Radiator Pressure Cap
Notice: If the pressure cap is not tightly installed,
coolant loss and possible engine damage may occur.
Be sure the cap is properly and tightly secured.
See Engine Compartment Overview on page 5-14 for
information on location.
Engine Overheating
You will find a coolant temperature gage on your
vehicle’s instrument panel. If your vehicle has a DIC,
the display will show an Engine Coolant Hot or Engine
Overheated message.
5-29