GMC 2003 C4C042, Owner'S Manual

Page: 263 / 386

6-9
If it comes on, use this chart.
NOTICE:
If you drive when this warning indicator is on,
you can damage your fuel injection system and
your engine. If the indicator comes on right after
you refuel, it means water was pumped into your
fuel tank. Turn off your engine immediately.
Then, have the water drained at once.
Water In Fuel Indicator Chart
Problem Recommended Action
Indicator comes
on intermittently. Drain water from fuel filter.
Indicator
stays on:
S At
temperatures
above freezing.
Drain fuel filter immediately.
If no water can be drained and
light stays on, see your dealer
for assistance.
S At
temperatures
below freezing.
Drain fuel filter immediately. If no
water can be drained
--
water may
be frozen in water drain system.
Water may be frozen in the fuel
lines. Move the vehicle to a warm
location to thaw out, and then
drain filter system.
S Immediately
after refueling,
large amount of
water possibly
pumped into
fuel tank.
Fuel tank purging required. See
your dealer for assistance.