how can i reset the tire pressure monitor with an after market radio installed?

There should be a reset button on the dash board or you can follow prompts through the driver information system also located in the dash. It is essential that before you reset the pressure monitor you make sure that the tires are all inflated to the correct psi because otherwise the system won't calibrate properly and will not recognize when a tire is going flat.

Does 2003 Chev Monte Carlo SS have a "reset button" or TPMS for resetting LOW TIRE PRESSURE light on dash? If a "reset button" where is it? If a TPMS my radio does not reset the light. Thank you.