Chevrolet 2009 Kodiak Owner's Manual page 214

Water In Fuel Light
Problem
Light comes on
intermittently.
Light stays on at
temperatures above
freezing.
Light stays on at
temperatures below
freezing.
Light stays on
immediately after
refueling, and a large
amount of water was
possibly pumped into the
fuel tank.
5-12
Recommended Action
Drain water from the fuel
filter.
Drain the fuel filter
immediately. If no water
can be drained and the
light stays on, see your
dealer/retailer for
assistance.
Drain the fuel filter
immediately. If no water
can be drained, water
may be frozen in the
water drain system, or in
the fuel lines. Move the
vehicle to a warm location
to thaw out, and then
drain the filter system.
Fuel tank purging is
required. See your
dealer/retailer for
assistance.
Notice: Driving when this warning indicator is on,
can damage the fuel injection system and the engine.
If the indicator comes on right after a refuel, it means
water was pumped into the fuel tank. Turn off the
engine immediately. Then, have the water drained
at once.
To drain water, do the following:
1. Stop and park the vehicle in a safe place. Turn off
the engine and apply the parking brake.
2. Remove the fuel cap.
3. Place a fuel-resistant container under the fuel filter.
The filter drain valve is located on the bottom of the
fuel filter.
If the vehicle has the 6.6L engine, the fuel filter is
located in the engine compartment on the driver side
of the vehicle. If the vehicle has either the 7.2L or
7.8L engine, the fuel filters are located in the engine
compartment on the driver side of the vehicle, and on
the driver side frame rail in front of the fuel tank.