Cooling System - Cadillac 2003 CTS Owner's Manual

Cooling System

When you decide it's safe to lift the hood, here's what
you'll see:
A. Coolant Surge Tank and Pressure Cap
B. Electric Engine Cooling Fans
5-12
CAUTION:
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 surge tank is boiling,
don't do anything else until it cools down. The vehicle
should be parked on a level surface.