What should I have my tire pressure set at? I

blow up tires to correct pressure scroll threw settings to reset function if this doset work you may have a bad tire sensor

Recommended tire pressure is listed on the drivers door jam and in the owners manual.

i would refer to your owners manual. this sounds like a low tire pressure warning light? if it is, the owners manual would have instructions for the procedure needed to reset the light.
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The low tire pressure warning should go out if you set all of the tire pressures to the correct pressure, then drive the vehicle for about a mile. You should not have to "relearn" the Tire Pressure Monitoring System (TPMS) unless the tires are (A.) rotated into different positions or (B.) There is a bad sensor that needs to be replaced.

For more information, you can read the information in your Owner's Manual. Here is a link to a pdf version 2009 Cobalt owners manual. (The information and procedures are the same for 2008 - 2010 Cobalts) The TPMS section starts on page 5-64

Cobalt Owner's Manual

brake fluid more than likely.

check the owners manual and ensure that the bruikfluid container is topped up inside the engine compartment

the tire pressure should be on a sticker by the drivers door, if you can't find it there is a max pressure on the sidewall of the tires, set them close to that

Yes, this is indictating at least 1 low tire of the 5, maybe more...Check ALL 5 tire pressures and set them to 29lbs, as per the specs and then turn your key to"ON"...then push and hold the button under the steering collumn until the light on the dash flashes 3 times, indicating that you have re-set the computer to recognize the pressure that you now have set....

Good luck.

this is the low tire pressure warning. refer to the owners manual, make sure the tires are set to proper pressure including the spare tire.

Low tire pressure warning. 2007 and up vehicles have a TPMS (Tire Pressure Monitoring System). Refer to your owners manual.

Look for a sticker on the drivers door panel. It will tell you what pressure to set for the tires. The owners manual may also contain this information. It is normal for a radial tire to look a little flat.