Service 4Wd; Service Ride Control; Service 4 Wheel Steer; Tighten Fuel Cap - GMC Denali 2004 Owner's Manual

SERVICE 4WD

If a problem occurs with the four wheel drive system,
this message will appear on the DIC. If this message
appears, stop as soon as possible and turn off the
vehicle. Restart the vehicle and check for the message
on the DIC display. If the message is still displayed,
or appears again when you begin driving, the four wheel
drive system needs service. Press the SELECT button
to acknowledge the message.

SERVICE 4 WHEEL STEER

If a problem occurs with the 4 wheel steer system, this
message will appear on the DIC. If this message
appears, stop as soon as possible and turn off the
vehicle. Restart the vehicle and check for the message
on the DIC display. If the message is still displayed,
or appears again when you begin driving, the four wheel
steer system needs service. Press the SELECT button
to acknowledge the message and clear it from the
DIC display.

SERVICE AIR SUSPENSION

If a problem occurs with the suspension system, this
message will appear on the DIC. If this message
appears, stop as soon as possible and turn off the
3-62
vehicle. Restart the vehicle and check for the message
on the DIC display. If the message is still displayed,
or appears again when you begin driving, the air
suspension system needs service. Press the SELECT
button to acknowledge the message.

SERVICE RIDE CONTROL

If a problem occurs with the suspension system, this
message will appear on the DIC. If this message
appears, stop and turn off the vehicle. Restart the
vehicle and check for the message on the DIC display.
If the message is still displayed, or appears again
when you begin to drive, the air suspension system
needs service.

TIGHTEN FUEL CAP

If the vehicle's fuel cap is not tightened properly this
message may appear along with the check engine light
on the instrument panel. See Malfunction Indicator
Lamp on page 3-40 . Reinstall the fuel cap fully. See
Filling Your Tank on page 5-6 . The diagnostic system
can determine if the fuel cap has been left off or
improperly installed. A loose or missing fuel cap will
allow fuel to evaporate into the atmosphere. A few
driving tips with the cap properly installed should turn
the light and message off.