GAS CAP SIGN KEEPS COMING UP ON MY SPEEDOMETER, I MADE SURE THE GAS CAP IS ON, NEVER SEEN THIS BEFORE, WHAT DOES IT MEAN?

May be leak in evap system, not the cap

This will normally mean a leak in the Evaporative Emission sytem. You can go to an Autozone or Oreillys and have them scan your vehicle for free. They will also clear the computer code if you want. This will make the light go out. If the gascap was loose, the code will continue for 30 to 40 startups until it clears.

If the code comes back, you have a small leak in the system and it needs to go on a "smoke" machine to detect anf fix the leak.