Adding Coolant; Radiator Pressure Cap - Chevrolet S10 Pickup 2003 Owner's Manual

The vehicle must be on a level surface. When your
engine is cold, the coolant level should be at ADD, or a
little higher. When your engine is warm, the level
should be up to FULL HOT, or a little higher.

Adding Coolant

If you need more coolant, add the proper DEX-COOL
coolant mixture at the coolant recovery tank.
{
CAUTION:
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.
Add coolant mixture at the recovery tank, but be careful
not to spill it.
{
CAUTION:
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.
Occasionally check the coolant level in the radiator. For
information on how to add coolant to the radiator,
see Cooling System on page 5-32 .

Radiator Pressure Cap

Notice: Your radiator pressure cap is a 15 psi
(105 kPa) pressure-type cap and must be tightly
installed to prevent coolant loss and possible engine
damage from overheating. Be sure the arrows on
the cap line up with the overflow tube on the radiator
filler neck.
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