My Camaro

<img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> ok.. my check gaes light comes out (for gas) right before the car dies... my friend 2002 camaro comes on and he always has about 50 miles to spare and my friend 2000 pontiac comes on way before he needs it. When mine comes on sometime i can turn off the car before it dies or otherwise it dies before i get to the keys.. Is there a way any one knows on how to replace the sensior or make it come on earyler??