Oldsmobile 2003 Alero Owner's Manual page 240

Checking Coolant
2.2L L4 ECOTEC Engine shown,
3400 V6 Engine similar
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 information
on
location.
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
mgine is cold, the coolant level should be at the FULL
;OLD mark, or a little higher.
If the low coolant light
comes on and stays on,
it
means you're low on
engine coolant.
See Low Coolant Warning Light on page 3-31 for more
nformation.
5-25