GMC 2007 Yukon XL Owner's Manual page 284

Radio Messages
Calibration Error: The audio system has been
calibrated for your vehicle from the factory.
If Calibration Error appears on the display, it
means that the radio has not been configured
properly for your vehicle and it must be returned
to your dealer for service.
Locked: This message is displayed when the
®
THEFTLOCK system has locked up the
radio. Take the vehicle to your dealer for service.
If any error occurs repeatedly or if an error
cannot be corrected, contact your dealer.
Radio Messages for XM™ Only
See XM Radio Messages on page 319 later in this
section for further detail.
Playing a CD (Single CD Player)
Insert a CD partway into the slot, label side up.
The player will pull it in and the CD should begin
playing.
284
Playing a CD(s) (Six-Disc CD Player)
^
LOAD : Press this button to load CDs into the
CD player. This CD player will hold up to
six CDs.
To insert one CD, do the following:
1. Press and release the load button.
2. Wait for the message to insert the disc.
3. Load a CD. Insert the CD partway into the slot,
label side up. The player will pull the CD in.
To insert multiple CDs, do the following:
1. Press and hold the load button for
two seconds. You will hear a beep and Load All
Discs will be displayed.
2. Follow the displayed instruction on when to
insert the discs. The CD player takes up to
six CDs.
3. Press the Load button again to cancel loading
more CDs.