2010 Chevrolet Colorado Crew Cab Owner's Manual - Page 202

Setting the Clock AM-FM Radio Press and hold HR until the correct hour displays. Press and hold MIN until the correct minute displays. There is an initial two-second delay before the clock goes into time-set mode. To display the time with the ignition off, press RCL, HR, or MIN. Radio(s) Radio with CD (MP3/WMA) Press and hold the HR button until the correct hour displays. Press and hold the MIN button until the correct minute displays. The time can 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 the HR and MIN buttons at the same time until RDS TIME displays. To accept this time, press and hold the HR and MIN buttons, at the same time, for another two seconds. If the time is not available from the station, NO UPDAT (update) displays. RDS time is broadcast once a minute. After tuning to an RDS broadcast station, it could take a few minutes for the time to update. AM-FM Radio 4-42