you do have an ( 02 ) sensor on the exhaust system
What is a gem module for 1999 mercury sable? And what does it control?
i have found that with my 97 sable the low coolant light comes on when my oil is low. same as your car can run hot when your extremely low or out of oil
Sounds like you have a bad Vehicle Speed Sensor.
On a 1999 Mercury Sable : The transaxle ( transmission ) is located in the engine compartment , bolted to the engine
According to the 1999 Mercury Sable Owner Guide : ( 5W-30 )
On a 1999 Mercury Sable : Relay # 30 is the Powertrain Control Module ( PCM ) relay
According to the 1999 Mercury Sable Owner Guide : ( 60.6 litres / 16.0 U.S. gallons )
1999 mercury sable horn replacement
the knock sensor is under intake, must remove intake and it is under two coolant lines.
The ECM in a 1999 Mercury Sable is located on the inside of the vehicle on the passenger side. It is located under the kick plate.
36R