GMC duramax diesel 2016 Supplement Manual page 56

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 Fuel
Filter
To drain water:
1. Turn the engine off and apply
the parking brake.
8-Cylinder Pickup
4-Cylinder Pickup
Driving and Operating
Van
2. Place a container under the
filter drain valve. The filter drain
valve is on the bottom of the
fuel filter. For 8-cylinder pickup
models, the filter drain valve is
on the passenger side of the
engine compartment. For
4-cylinder pickup and van
models, the filter drain valve is
under the vehicle on the driver
side, inside the frame rail.
3. For 8-cylinder pickup models,
open the drain valve by turning
it two to three turns. Pump the
primer until fuel empties from
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