If you have a digital display on your skylark, therer is a button on the top right side of the diaplay. The button is used to change from volts, oil press, rpm, and temp, depending on which you want to see.
On a 1987 Buick Skylark, the temperature sensor is typically located near the engine block, often on the intake manifold or cylinder head. It is usually positioned on the driver's side of the engine and may be near the thermostat housing. This sensor monitors the engine's coolant temperature and sends the data to the gauge on the dashboard. Always consult the vehicle's service manual for precise location and identification.
It has several sending units such as a fuel gauge sending unit, oil pressure gauge sending unit, temperature gauge sending unit, need to know which one you are looking for.
190 - 220
replace temperature gauge
The gauge sender is located on the back driverside top of the head.
The coolant tank has a marking on it that says "Full Hot". That should tell you that you have enough coolant. Also keep an eye on your temperature gauge. It should be less than 220 degrees.
Fuse location for temperature gauge for a Malibu
Defective temperature gauge or defective temperature sensor?
Bad gauge or defective coolant temperature sensor
why is the temperature gauge not moving on a 2007 Lincoln mkz
Why does your temperature gauge rise and lower only when you have the heat on?
An automobile temperature gauge can fluctuate when the thermostat is opening and closing erratically. The temperature gauge can also fluctuate when the ground wire is loose.