Express-down Windows
Vehicles with the express-down feature allow the driver and front passenger windows to be lowered without holding the switch. Push the switch down to the second detent, then release, to activate the express-down mode. The express-down mode can be canceled at any time by pulling up on the front of the switch. To open the window partway, push the switch down to the first detent until the window is at the desired position.
See also:
Customer Assistance Offices (U.S. and Canada)
GMC encourages customers to call the toll-free number for assistance.
However, if a customer wishes to write or e-mail GMC, the letter should be addressed to:
United States
GMC Customer Assistance ...
Manual Windows
Turn the hand crank on each door to manually raise or lower the manual windows. ...
Selecting the Alert Timing
The Collision Alert control is on the steering wheel. Press COLLISION ALERT to
set the alert timing to far, medium, near or off. The first button press shows the
current control setting on the D ...