GMC Terrain 2018 Owner's Manual page 239

238 Driving and Operating
Water in Fuel Troubleshooting
If the WATER IN FUEL - CONTACT
SERVICE message comes on:
Recommended
Problem Action
Message The fuel filter is
displays but partially filled
goes off during with water. Drain
the ignition the water as
cycle. soon as
possible. See
"Removing
Water from the
Fuel Filter"
following.
Recommended
Problem Action
Message Drain the fuel
displays and filter
stays on. immediately.
If no water can
be drained, and
the temperature
is below
freezing, then
water may be
frozen in the
filter. Move the
vehicle to a
warm location to
thaw the water,
then drain the
fuel. If water still
does not drain,
see your dealer.
Recommended
Problem Action
Immediately A large amount
after refueling, of water is in the
message fuel tank. Drain
displays and the fuel filter
stays on. immediately.
If the message
stays on or
comes back on
without
refueling, then
fuel tank purging
is required. See
your dealer.
If the message
displays and the
engine stalls or
runs rough, do
not drive until
the water
contaminated
fuel is drained.