2004 GMC Sierra 1500 Pickup Owner's Manual - Page 288

Problem No power. Disc will not play. The picture does not fill the screen. There are black borders on the top and bottom or on both sides or it looks stretched out. The disc was ejected, but it was pulled back into the DVD player. Recommended Action The ignition might not be in on or accessory. Check to make sure the parental control button has not been activated. (The power indicator light will flash if parental control is active.) The system might be off. Check to make sure the parental control button has not been activated. (The power indicator light will flash if parental control is active.) The system might be in auxiliary mode. The disc is upside down or is not compatible. Check the display mode settings in the display menu. Problem In auxiliary mode, the picture moves or scrolls. The language in the audio or on the screen is wrong. The remote control does not work. Recommended Action Check the auxiliary input connections at both devices. Change the Video Format to PAL or NTSC. Check the audio or language selection in the main DVD menu. Check to make sure there is no obstruction between the remote control and the infrared window located below the video screen. Check the batteries to make sure they are not dead or installed incorrectly. Check to make sure the parental control button has not been activated. (The power indicator light will flash if parental control is active.) The disc is being stored in the DVD player. Press the eject button again to eject the disc. 3-124