Adjusting the Treble, Midrange, and Bass
1. Press the TONE button.
2. Select Treble, Midrange, or Bass.
3. Select the value.
Press the 
BACK button to go
back to the Tone Settings menu.
See also:
Manual Transmission Fluid
It is not necessary to check the manual transmission fluid level.
A transmission fluid leak is the only reason for fluid loss. If a leak occurs, take the vehicle to your dealer service department and ...
DIC Operation and Displays
The DIC has different displays which can be accessed
by pressing the DIC buttons located on the instrument
panel, to the left of the instrument panel cluster. ...
Engine Oil Additives / Engine Oil
Flushes
Do not add anything to the oil. The recommended oils
with the starburst symbol that meet GM Standard
GM6094M are all that is needed for good performance
and engine protection.
Engine oil system ...