GMC Duramax Diesel 2015 Owner's Manual page 57

9-30 Driving and Operating
Recommended
Problem
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 again without
refueling, fuel
tank purging is
required. See
your dealer.
If the message
displays and the
vehicle stalls or
has rough
riding, do not
drive until the
water
contaminated
fuel is drained.
Action
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.
2. Remove the fuel cap.
Caution
Pickup
Van