How to reset the change oil indicator

Hi,
It's Buick Century 2003. I lost the owner's manual.
Is there anyone can tell me how to reset the change oil indicator?
I usually change oil in other Auto Service but not Buick dealer.
Thanks.

How to Reset the CHANGE OIL SOONLightThe GM Oil Life SystemTM calculates when tochangeyour engine oil and filter based on vehicle use. Anytimeyour oil is changed, reset the system so it cancalculate when the next oilchange is required. If asituation occurs where you change your oil prior to aCHANGE OIL SOON light being turned on, resetthe system.After changing the engine oil, reset the system byperforming the following steps:1. With the engine off, turn the ignition key toRUN.2. Fully push and release the accelerator pedal slowlytnree times within five seconds.If the CHANGE OIL SOON light flashes, thesystem is resetting.3. Turn the key to OFF, then start the vehicle. The oillife will change to 100 percent.If the CHANGE OIL SOON light comes back on,the system has not reset. Repeat the procedureThis may help also, an online owners manual.http://www.mygmlink.com/pdf/go2content/manual/US/en/buick/2003century.pdf

Thank you so much!
I had reseted it!