Chevrolet 2003 Tahoe Owner's Manual page 382

Checking Coolant
The coolant surge tank
is
located in the engine
compartment on the
passenger's side of the
vehicle. See Engine
Compantment Overview on
page 5-74 for more
information on location.
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.
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.
See "Low Coolant Level" under DIC Warnings and
Messages on page 3-62.
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.
You can be burnec you spill coa
In 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.
When replacing the pressure cap, make sure it is
hand-tight.
5-29