Engine Coolant Temperature; Gauge - GMC 2018 Terrain Owner's Manual

116 Instruments and Controls
Here are things that some owners
ask about. None of these show a
problem with the fuel gauge:
At the service station, the fuel
pump shuts off before the gauge
reads full.
It takes a little more or less fuel
to fill up than the gauge
indicated. For example, the
gauge indicated the tank was
half full, but it actually took a
little more or less than half the
tank's capacity to fill the tank.
The gauge moves a little while
turning a corner or speeding up.
The gauge takes a few seconds
to stabilize after the ignition is
turned on, and goes back to
empty when the ignition is
turned off.
Engine Coolant
Temperature Gauge
Uplevel
This gauge measures the engine
coolant temperature.
The warning area at the far end of
the gauge may appear shaded or
may be colored red.
If the pointer approaches the
warning area or the shaded
thermostat symbol, the engine may
be too hot.
Under some driving conditions,
including those listed below, it is
normal for the temperature to rise
above the usual operating range
and approach the far end of the

gauge:

Stop and go driving in heavy
traffic.
High speed operation in warm
weather.
Uphill driving.
Trailer towing or hauling a
heavy load.
It is normal for the reading to
fluctuate.
If the gauge pointer reaches the
warning area or the shaded
thermostat symbol at the far end of
the gauge and remains there for
more than 30 seconds, the engine
coolant has overheated.
If the engine coolant has
overheated, pull over and stop the
vehicle as soon as it is safe to do
so. Then, turn the engine off
immediately.
See Engine Overheating 0 234.