GMC Terrain 2025 - Page 234

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-18552429) - 2025
Vehicle Care 233
Never dispose of engine coolant by putting
i
t
in the trash, pouring it on the ground,
or pouring into sewers, streams, or bodies
of water. Have the coolant changed by an
authorized service center, familiar with legal
requirements regarding used coolant disposal.
This will help protect the environment and
your health.
Checking Coolant
The vehicle must be on alevel surface when
checking the coolant level.
Check to see if coolant is visible in the coolant
surge tank. If the coolant inside the coolant
surge tank is boiling, do not do anything
else until it cools down. If coolant is visible
but the coolant level mark is not visible, add
a
50/50 mixture of clean, drinkable water and
DEX-COOL coolant at the coolant surge tank to
the top rib on the middle of the tank, but be sure
the cooling system is cool before this is done.
See Engine Overheating 3234.
The coolant surge tank is located in the engine
compartment on the driver side of the vehicle.
See Engine Compartment Overview 3226.
How to Add Coolant to the Surge Tank
{ W
arning
S
pilling coolant on hot engine parts can
b
u
rn you. Coolant contains ethylene glycol
and it will burn if the engine parts are
hot enough.
{ Warning
Steam and scalding liquids from ahot
co
oling system are under pressure. Turning
the pressure cap, even alittle, can cause
them to come out at high speed and you
could be burned. Never turn the cap when
(Continued)
Warning (Continued)
the cooling system, including the pressure
cap, is hot. Wait for the cooling system and
pressure cap to cool.
Caution
Failure to follow the specific coolant fill
p
r
ocedure could cause the engine to
overheat and could cause system damage.
If coolant is not visible in the surge tank,
contact your dealer.
The coolant surge tank pressure cap can be
r
e
moved when the cooling system, including
the surge tank pressure cap and upper radiator
hose, is no longer hot.