if you have the owners manual, check the index. I can't find mine right now, but I know that you have to hold the radio power button and another button on the stereo in for thirty seconds and then the on the stereo display - it will flash asking about resetting the tire pressure gauge. If you can't find your manual, repost and I will dig mine out.
Add brake fluid
(1) Have you checked he inflation pressure of the spare? (2) Have you re-set the warning system?
The light should extinguish itself after inflating the offending tire to the correct pressure. If it does not, you probably have a bad tire pressure sensor.
http://www.topix.com/forum/autos/chevrolet-impala/T4P2NGT979PJ7QT2P
To reset the tire pressure warning light on a 2011 Chevy Impala, first ensure that all tires are properly inflated to the recommended pressure. Then, turn the ignition to the "On" position without starting the engine. Press and hold the tire pressure monitoring system (TPMS) reset button, usually located beneath the steering column or near the driver's side door, until the light blinks and then goes off. Finally, turn off the ignition and start the engine to check if the light remains off.
To turn off the low windshield washer fluid warning light in a 2007 Chevrolet Impala, first ensure that the windshield washer fluid reservoir is filled to the appropriate level. Once it's filled, the warning light should turn off automatically after a short drive. If it remains illuminated, check for any issues with the sensor or wiring. If needed, consult the owner's manual or a professional for further assistance.
disconnect your battery and then reconnect. The light should reset and turn off.
It is important to understand why the warning lights come on. The airbag light will come on in any car if there is an issue with any airbag in the car, an issue with the wiring to or from the air bags, an issue with the horn, or the wiring of the horn.
ADD FUEL
Evidently the oil level was low before you changed oil and was full thereafter.
To reset the tire pressure warning light on a 2008 Chevy Impala, first ensure that all tires are inflated to the recommended pressure. Then, turn the ignition to the "On" position without starting the engine. Press the gas pedal three times within five seconds, then turn the ignition off. Finally, start the engine, and the tire pressure light should be reset.
Time to change your oil in your engine!