Pontiac 2002 Grand Prix - Manual (Page 291)

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Checking Coolant
The coolant recovery tank is located in the engine
compartment toward the rear of the engine on the
passenger’s side of the vehicle. See “Engine
Compartment Overview” in the Index 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 COLD
mark or a little higher. When your engine is warm, the
level should be up to the HOT mark or a little higher.
If this LOW COOLANT
light comes on and stays on,
it means you’re low on
engine coolant.