Found out my spare tire was not 50psi but 30psi. The other 4 tires were all below 35psi -- once I filled the tires to the correct psi -- No Low Tire light.

Went to Autozone and had them look at my check engine light -- P0455 -- Had him erase the code since I had not had a Gas Cap light since filling up the tank with gas and making sure the gas cap was turned past one or two clicks. -- So far after 55 miles of driving, No Check Engine light.

I also looked at the line and hose from the gas cap to the rear of the gas tank, both line and hose checked out good.

If the check engine light comes back on, I will have the emissions checked from the front of the gas tank to the computer.

Thanks for everyone's replies as they helped me sort through options and told me what to look out for in the future. I have read the owners manual from cover to cover, so I should be a little more familiar with the H3 now, in addition to the help I received on this forum.