Cadillac CTS 2018 Owner's Manual page 257

256 VEHICLE CARE
2.0L L4 Engine (LTG)
1. Engine Coolant Surge Tank
and Pressure Cap
2. Engine Cooling Fan (Out
of View)
6.2L V8 Engine (LT4)
1. Engine Coolant Surge Tank
and Pressure Cap
2. Engine Cooling Fan (Out
of View)
Warning
An underbonnet electric fan can
start up even when the engine is
not running and can cause injury.
Keep hands, clothing, and tools
away from any underbonnet
electric fan.
Warning
Do not touch heater or radiator
hoses, or other engine parts. They
can be very hot and can burn you.
Do not run the engine if there is a
leak; all coolant could leak out.
That could cause an engine fire and
can burn you. Fix any leak before
driving the vehicle.
Engine Coolant
The cooling system in the vehicle is
filled with DEX-COOL engine coolant.
See Scheduled Maintenance 0 319 and
Recommended Fluids and Lubricants
0 322.
The following explains the cooling
system and how to check and add
coolant when it is low. If there is a
problem with engine overheating, see
Engine Overheating 0 259.