Cadillac XT4 Owner Manual (GMNA-Localizing-Europe-15440913) - 2022 -
CRC - 5/13/21
268
DRIVING AND OPERATING
Caution
Driving with this message on may
damage the fuel injection system
and the engine. If the message
illuminates directly after refuelling,
water has been pumped into the
fuel tank. Turn off the engine and
drain the water immediately.
Removing Water from the Fuel Filter
To drain water:
1. Turn the engine off and apply the
parking brake.
2. Place a container under the filter
drain valve, which is on the bottom
of the fuel filter.
3. Turn the drain plug anticlockwise
using a suitable tool.
4. With the engine turned off, press
and hold ENGINE START/STOP
without applying the brake for
five seconds to place the vehicle in
Service Mode. See
. Wait approximately
five seconds, and then press
ENGINE START/STOP again to
turn it off. This operation will
enhance water flow out of the
filter. The filter is drained as soon
as diesel fuel emerges from
the port.
5. Retighten the drain plug by turning
it clockwise.
6. Properly dispose of the
water-contaminated fuel.
7. Start the engine and let it run for a
few minutes. During the draining
process, air may have entered the
fuel system. If the engine stalls, the
fuel system may need to be primed.
See
“
Fuel Priming
”
following.
Fuel Priming
For the fuel system to work properly,
there must not be any air in the fuel
lines. If air does enter, the engine may
not start and the fuel lines will need
to be primed before operating the
vehicle.
If air is present, the following may
have occurred:
.
The vehicle has run out of fuel.
.
The fuel filter was removed.
.
The fuel lines were removed or
disconnected.
.
The fuel filter water drain valve was
opened while the engine was
running.