Service Charging System; Tighten Fuel Cap - GMC Sierra Denali 2006 Owner's Manual

SERVICE CHARGING SYSTEM

On some vehicles, if there is a problem with the battery
charging system, this message will appear on the DIC.
Under certain conditions, the battery warning light
may also turn on in the instrument panel cluster.
See Battery Warning Light on page 3-33. The battery
will not be charging at an optimal rate and the vehicle
will lose the ability to enter the fuel economy mode.
The vehicle is safe to drive, however you should have
the electrical system checked by your GM dealer.
Pressing any of the four DIC buttons or the trip odometer
reset stem will acknowledge the message and clear it
from the DIC display.

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 3-38. Reinstall the fuel cap fully. See
Filling the 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 trips
with the cap properly installed should turn the light and
message off.
3-54
TRANS (Transmission) HOT IDLE
ENGINE
Notice: If you drive your vehicle while the
transmission fluid is overheating and the
transmission temperature warning is displayed
on the instrument panel cluster and/or DIC, you can
damage the transmission. This could lead to
costly repairs that would not be covered by your
warranty. Do not drive your vehicle with overheated
transmission fluid or while the transmission
temperature warning is displayed.
If the transmission fluid in the vehicle gets hot, this
message will appear on the DIC along with a continuous
chime. Driving with the transmission fluid temperature
high can cause damage to the vehicle. Stop the vehicle
and let it idle to allow the transmission to cool. This
message will clear and the chime will stop when the fluid
temperature reaches a safe level. See Transmission
Temperature Gage on page 3-36.