Hopefully you still have you manual. I will tell you how to reset the HHR, I found it in my manual. Turn the key to on, press lock and unlock at the same time on your key fob. The horn will beep twice telling you that you are in program mode. The left front turn signal light will come on, press the valve core letting air out of the left front tire. The horn will beep when left front is programmed. Then the right front turn signal will come on, let air out till horn beeps. Then right rear, same procedure then left rear same procedure. When that is done horn will beep twice again saying tire program is complete. Turn key off, make sure you air all tires back up.
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