How do I reset the factory clock on my radio? Showing the wrong time...Thanks.

1.Most GM vehicles of that vintage set the radio in similar ways. Key on, radio off, push and hold the "Set" button until the time starts flashing. Push the scan button to change the time. If the scan button doesn't work, try a few times until the time starts changing..........................2. trying to remember cause i just did this, hit the set button and use the volume and/or tuning knob to advance, i think this is it, if not hit the set and try one of the other knobs, hope this helps