2004 Oldsmobile Alero Owner's Manual - Page 144
2004 Oldsmobile Alero Manual
Page 144 highlights
Setting the Time for Radios with Radio Data Systems (RDS) Press and hold HR or MN for two seconds. Then press and hold HR until the correct hour appears on the display. AM or PM will appear on the display for morning and evening hours. Press and hold MN until the correct minute appears on the display. The time may be set with the ignition on or off. To synchronize the time with an FM station broadcasting Radio Data System (RDS) information, press and hold HR and MN at the same time for two seconds until UPDATED appears on the display. If the time is not available from the station, NO UPDATE will appear on the display. RDS time is broadcast once a minute. Once you have tuned to an RDS broadcast station, it may take a few minutes for your time to update. Radio with CD (Base Level) Playing the Radio PWR (Power): Press this knob to turn the system on and off. VOL (Volume): Turn this knob to increase or to decrease volume. RCL (Recall): Press this knob to switch the display between the radio station frequency and the time. Time display is available with the ignition turned off. 3-40