The Oldsmobile Alero debuted in 1999 and was produced until 2004. It shared most of its components, including its chassis, engine, body panels and interior, with the Pontiac Grand Am.
The Alero was available with an optional six-disc CD changer; however, the process for setting the clock is the same no matter what radio the Alero is equipped with. You can set the Alero’s clock with or without the keys in the ignition.
Hold the “HR” button for three seconds to enter the hour programming mode.