User's Manual

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-10664916) - 2018 - crc - 4/7/17
Driving and Operating 239
Caution
Driving with this message on can
damage the fuel injection system
and the engine. If the message
comes on right after a refuel,
water was pumped into the fuel
tank. Turn off the engine and
drain the water immediately.
Removing Water from the Fuel
Filter
To drain water:
1. Turn the engine off and apply
the parking brake.
2. Place a container under the
filter drain valve, which is on
the bottom of the fuel filter.
FWD Shown, AWD Similar
3. Turn the drain plug
counterclockwise using a
suitable tool.
4. With the engine off, press and
hold ENGINE START/STOP
without applying the brake for
five seconds to place the
vehicle in Service Mode. See
Ignition Positions 0 182. Wait
approximately five seconds,
and then press ENGINE
START/STOP again to turn it
off. This operation will enhance
water flow out of the filter. The
filter is drained as soon as
diesel fuel emerges from
the port.
5. Retighten the drain plug by
turning it clockwise.
6. Properly dispose of the water
contaminated fuel.
7. Start the engine and let it run
for a few minutes. During the
draining process, air may have
entered the fuel system. If the
engine stalls, the fuel system
may need to be primed. See
“Fuel Priming” following.
Fuel Priming
For the fuel system to work properly,
air cannot be in the fuel lines. If air
gets in, the engine may not start
and the fuel lines will need to be
primed before operating the vehicle.
If air is present, the following may
have happened:
.
The vehicle ran out of fuel.
.
The fuel filter was removed.
.
The fuel lines were removed or
disconnected.