GMC 2018 Terrain Owner's Manual page 232

2. Engine Coolant Surge Tank
and Pressure Cap
2.0L Engine
1. Engine Cooling Fans (Out
of View)
2. Engine Coolant Surge Tank
and Pressure Cap
Warning
An underhood electric fan can
start up even when the engine is
not running and can cause injury.
Keep hands, clothing, and tools
away from any underhood
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.
If the coolant inside the coolant
surge tank is boiling, do not do
anything else until it cools down.
The vehicle should be parked on a
level surface.
The coolant level should be at the
cold fill line. If it is not, the vehicle
may have a leak at the radiator
hoses, heater hoses, radiator, water
pump, or somewhere else in the
cooling system.
If there seems to be no leak, with
the engine on, check to see if the
electric engine cooling fan is
running. If the engine is
Vehicle Care
overheating, the fan should be
running. If it is not, the vehicle
needs service. Turn off the engine.
Engine Coolant
The engine cooling system in the
vehicle are filled with DEX-COOL
engine coolant mixture. This coolant
needs to be checked and changed
at appropriate levels.
See Recommended Fluids and
Lubricants 0 294 and Maintenance
Schedule 0 290.
The following explains the cooling
systems and how to check and add
coolant when it is low. If there is a
problem with engine overheating,
see Engine Overheating 0 234.
What to Use
Warning
Plain water, or other liquids such
as alcohol, can boil before the
proper coolant mixture will. With
plain water or the wrong mixture,
the engine could get too hot but
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