2005 Corvette: GM TechLink: Setting the Clock Radio
Owners of some 2005 Corvettes may state that the clock reads in 24 hour time (military time) on vehicles equipped with the RPO US8 or US9 radios.
If the customer wishes to switch between military time and 12 hour time, follow this procedure.
1. Press and hold the hours button for 2-3 seconds.
2. Depress the radio tuner knob to toggle between 12 hour and 24 hour (military) format. Release the knob for 30 seconds for the change to occur.
TIP: The Navigation radio (RPO U3U) can be changed from military time to regular time by accessing the clock menu.
- Thanks to Paul Radzwilowicz, GM TechLink, December 2004
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Since changing car battery nav time cannot be set and sometimes gps with a slash shows. Is there any way to reset radio? Nav seems to work, xm works and fm and am work. Only the time screen is not functional for a 2007 C6 Z51.