Chevrolet 1998 Tracker Owner's Manual page 216

I
An electric engine cooling fan under the hood
can start up even when the engine is not running
and can injure you. Keep hands, clothing and
tools away from any underhood electric fan.
Don't reach through the grille to release the
underhood lever.
If the coolant inside the coolant recovery tank is boiling,
don't do anything else until it cools down.
The coolant level should be at or above
FULL.
If it isn't, you may have a leak in the radiator hoses,
heater hoses, radiator, water pump or somewhere else in
the cooling system.
5-15