Spike,

The gas caps are different from the 03 to the 04. The locking gas cap that comes with the new gm fuel door only fits the 04. I could be wrong as it is a bit early to make hasty statments but I have yet to see one that would fit an 03. BIG-C

White 03-H2-LUX

<a target="_blank" href="http://www.gstyle4u.com">
</a>