Checking Coolant - GMC Yukon Owner's Manual

Checking Coolant Adding Coolant
. . .,
.: .
Turning the radiator pressure cap when the
engine and radiator are hot can allow steam and
scalding liquids to blow out and burn you badly.
With the coolant recovery tank, you will almost
never have to add coolant at the radiator.
Never turn the radiator pressure cap
--
even a
little
--
when the engine and radiator are hot.
The coolant recovery tank is located on the passenger
side at the rear corner of the engine compartment.
Add coolant mix at the recovery tank, but be careful not
to spill it.
When your engine is cold, the coolant level should be at
the COLD mark, or a little higher. When your engine is
warm, the level should be up to the HOT mark, or a
little higher.
You can be burned if you spill coolant on hot
engine parts. Coolant contains ethylene glycol,
and it will burn if the engine parts are hot
enough. Don't spill coolant on a hot engine.
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