Radiator Pressure Cap; Cooling System - Buick 2004 LeSabre Owner's Manual

If there's still no sign of steam, you can idle the engine
for three minutes while you're parked. If you still
have the warning, turn off the engine and get everyone
out of the vehicle until it cools down.
You may decide not to lift the hood but to get service
help right away.

Cooling System

When you decide it is safe to lift the hood, here is what
you will see:
A. Coolant Recovery Tank
B. Radiator Pressure Cap
C. Electric Engine Cooling Fans
5-28
CAUTION:
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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.
If the coolant inside the coolant recovery tank is boiling,
do not do anything else until it cools down. The
vehicle should be parked on a level surface.
See Engine Compartment
Overview on page 5-12 for
more information on
location.