Chevrolet TRACKER 2003 Manual page 243

The coolant level should be at or above FULL. If it isn't
you may have a leak at the pressure cap or in the
radiator hoses, heater hoses, radiator, water pump
or
somewhere else in the cooling system.
Heater and radiator hoses, and other engine
parts, can be very hot. Don't touch them. If you
do, you can be burned.
Don't run the engine if there is a leak. If you
run the engine, it could lose all coolant. That
could cause an engine fire, and you could be
burned. Get any leak fixed before you drive the
vehicle.
If there seems to be no
leak, start the engine again.
The engine cooling fan speed should increase when idle
speed is doubled by pushing the accelerator pedal
down. If it doesn't, your vehicle needs service. Turn off
the engine.
Notice: Engine damage from running your engine
without coolant isn't covered by your warranty.
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