GMC Sierra Denali Owner's Manual page 295

2003
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Checking Coolant
The coolant surge tank is
located in the engine
compartment on the
passenger's side of the
vehicle. See Engine
Compartment Overview
on page 5-12 for more
'
Turning the surge tank pressure cap when the
engine and radiator are hot can allow steam
and scalding liquids to blow out and burn you
badly. Never turn the surge tank pressure
cap
-
even a little
-
when the engine and
radiator are hot.
The vehicle must be on a level surface. When your
engine is cold, the coolant level should be at the
FULL COLD mark.
If the LOW COOLANT LEVEL message comes on and
stays on, it means you're low on engine coolant.
See "Low Coolant Level" under DIC Warnings and
Messages
on
page 3-53.
Adding Coolant
If you need more coolant, add the proper DEX-COOL@
coolant mixture at the surge tank, but only when the
engine is cool.
I
You can I:
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.
I
I
When replacing the pressure cap, make sure it
is
hand-tight.
5-26

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