Pontiac G3 2010, Owner'S Manual

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The engine coolant surge tank is located in the rear of
the engine compartment on the driver side of the
vehicle. See
Engine Compartment Overview on
page 6 ‑ 14 for more information on location.
{
WARNING:
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.
When the engine is cold, the coolant level should be
between the Maximum (A) and Minimum (B) marks on
the coolant surge tank. The level rises at engine
operation temperature and drops again when the engine
cools down.
The coolant should be between the Maximum (A) and
Minimum (B) marks, when the engine is cold. If it is not,
there could be a leak in the cooling system.
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