its a dance party
Your radiator is probably leaking transmission fluid into your coolant. Trans cooler is built into the radiator. Replace the radiator.
Radiator full and coolant recovery tank filled to mark Radiator full and coolant recovery tank filled to mark
Check coolant level in coolant recovery tank and radiator
Low coolant in coolant recovery tank or radiator or defective sensor
In radiator or through coolant recovery tank
It uses the cap on the coolant recovery tank as its "radiator cap".
On the coolant overflow bottle
to the coolant recovery tank if so equipped - if no coolant recovery tank then not connected to anything - just an overflow
Adding coolant to a 2003 Pontiac Grand Am is very easy to do. The coolant can be directly added to the radiator. Make sure the engine is not hot before adding the coolant.
Defective radiator caps or tubes
Follow the small hose from the radiator. It goes to the recovery tank.
Before changing the radiator on a 2001 Pontiac Montana the coolant must first be drained. After the drain remove the radiator mounts, fans, and hoses. Pull the radiator upwards.