GM dexcool is what it came factory with. It's good for 5 yr 100km. You could thouroughly flush system and use green but there is no problem with the dexcool
For a 1999 Saturn SL2, it is recommended to use a universal antifreeze/coolant that meets the GM specifications for your vehicle, typically a 50/50 mix of coolant and distilled water. You can also check your vehicle's owner's manual for specific recommendations.
The 1999 Saturn engine uses dexcool type coolant. This coolant is different form other types and cannot me mixed with another type.
on the right side of the engine
about 1 gallon your owners manuel should have this info
Not necessary on this vehicle.
To the right of the glove box.
The 1999 Saturn S-Series engine heats up the coolant, the thermostat valve opens and the coolant circulates between the radiator and the engine. Then the radiator fans turn on to cool it back down. The fans are also turned on when the air conditioner is turned on to aid in cooling the radiator and the air conditioner condensor.
( no ) The 1.9 liter four cylinder engine in a 1999 Saturn S series has a timing CHAIN
Behind the right headlight .
Common for a cracked coolant temperature sender. Although there are many other possiblilites. Don't wait, get it figured out ASAP.
The coolant temperature sensor on a 1999 Mondeo is located on top of the engine, in the intake manifold. It constantly updates the vehicle's computer and controls the cooling fan.
The computer with input from the engine coolant temperature sensor.