Chevrolet GMC 2002 Owner's Manual Supplement page 35

Water In Fuel Light Chart
Problem Recommended Action
Light comes Drain water from fuel filter.
on intermittently.
Light stays on: Drain fuel filter immediately.
If no water can be drained and
S
At temperatures
light stays on, see your dealer
above freezing.
for assistance.
S
At temperatures Drain fuel filter immediately. If no
below freezing water can be drained
(3500HD). be frozen in water drain system.
Open the air bleed valve to
check for fuel pressure. If no fuel
pressure is present, water may be
frozen in the fuel lines. Move the
vehicle to a warm location to
thaw out.
6-6
Problem
S
At temperatures
below freezing
(Full
S
Immediately
after refueling,
large amount of
--
water may
water possibly
pumped into
fuel tank.
Hard starting, hesitation or "flat" performance at
high speed or during hard acceleration may be an
indication of premature fuel filter plugging due to dirty
or contaminated fuel. The filter element may need to be
changed if this happens. See "Fuel Filter Replacement"
later in this section.
Recommended Action
Drain fuel filter immediately. If no
water can be drained
-
Size Van). be frozen in fuel filter or fuel
lines. Replace fuel filter or move
the vehicle to a warm location to
thaw out.
Fuel tank purging required.
See your dealer for assistance.
--
water may