Q: Oil change and low tire pressure lights. on 1999 Oldsmobile Alero

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Does anyone with a 99 olds alero have the factory manual ? I need to reset these codes and have had no luck. Tire pressure is good and oil was changed 2 weeks ago. Can you help ?
(2) Answers
Turn the key to the "On" position. Dont start the car though. Let it sit there for about 10 mins. After waiting, press the gas pedal all the way down 3 times, then turn the car off. Wait 1 minute then turn the car back on. Light should have gone off after that.
For tire pressure use reset button inside fuse panel on the driver side dash. For oil light, turn the key to the on position, step and press the gas pedal down all the way three times. Wait then the light should go off.