Setting the Time for Radios without Radio Data Systems (RDS) for Chevrolet Blazer - 4WD 2003

Press and hold HR until the correct hour appears on the display. Press and hold MN until the correct minute appears on the display. To display the time with the ignition off, press RECALL or HR/MN and the time will be displayed for a few seconds. There is an initial two-second delay before the clock goes into the time-set mode.