About 2 gallons of 50-50 mix of concentrated coolant and water.
where is the coolant temperature sensor locate
Check the coolant level. Not just the bottle but in the radiator too. The 3400 motor is known for leaking coolant at the intake manifold.
Low Coolant. Poor coolant circulation. Intake gasket. Head gasket.
Coolant Temperature Sensor
1 and a half gallon of already mixed coolant
you should use the dextrol coolant
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.
the coolant temperature sensor is faulty. It will need to be replaced
The "Low Coolant Sensor" on a 1997 Pontiac Montana is located appro 6" below the radiator cap which is on the left as your facing the engine. The sensor measures the fluid level in the radiator itself and is prone to giving false alarms when it gets dirty.
It is on the intake manifold near the thermostat housing.
The coolant level sensor in the coolant reservoir detects the coolant level is low. The coolant system must have a leak in it somewhere. Have a trusted mechanic diagnose it soon before you do damage to the engine.