Fuel Tank Gas Cap is a direct fit for the following:

2004-2005 Buick Rendezvous
2003-2004 Cadillac CTS
2004 Cadillac SRX
2004-2005 Cadillac XLR
2004-2005 Chevrolet Astro
1997-2005 Chevrolet Corvette
2004-2005 Chevrolet Malibu
2003-2004 Chevrolet SSR
2002-2004 Chevrolet Trailblazer
2002-2004 GMC Envoy
2004-2005 GMC Safari
2004 Oldsmobile Alero
2002-2004 Oldsmobile Bravada
2004-2005 Pontiac Grand Am
2003-2005 Saturn Ion
2000-2005 Saturn L-Series

Genuine GM Part Number: 10372242