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Add engine coolant
there is no real radiator cap. On the left side of engine compartment there is a coolant jug. This where you would add coolant to radiator.
The overflow resavour is where you add coolant
Cold engine. Remove the radiator cap, top it off, start the engine, add coolant as necessary until all air bubbles stop escaping.
If you are talking about the low coolant light then it is just low of coolant. Add coolant to the recovery tank. If you are talking about the coolant temperature light, then the engine is overheating. You may need to have the cooling system serviced. Drain the coolant and flush the system. Install a new thermostat, and add a 50/50 mix of antifreeze and distilled water.
On the passenger side of the engine compartment there is a surge tank remove that and the sensor is in the bottom. It will be the clear plastic tank where you add Coolant.
I have an 89 Olds Cutlass Calais SL...and you add coolant, very slowly, to the reservoir on the passenger side of the engine compartment. A little coolant, a little water, a little more coolant, a little more water...you get the idea. mixing the antifreeze 50 / 50 to start with will cut down on the confuse...tuner1978
Add coolant to the full cold line on the coolant reservoir when engine is cold.
Remove the radiator cap when the engine is cool and add the coolant into the radiator or you can add to the coolant overflow bottle. DON'T remove the radiator cap when the engine is hot!!!
Most vehicles have a coolant reservoir (a clear plastic tub) with a phrase "engine coolant only" printed on the cap. This is where you should add engine coolant.
All engine coolant is roughly the same but some are advertised for performance cars.
The coolant add/overfill jug is on the left side of the motor when your looking at it. Add coolant up the closest line towards the top, and only when the engine is cold.