Fog Lamp is a direct fit for the following:

2003-2004 Chevrolet Avalanche 1500
2003-2004 Chevrolet Avalanche 2500
2003-2004 Chevrolet Silverado 1500
2003 Chevrolet Silverado 1500 HD
2003-2004 Chevrolet Silverado 2500
2003-2004 Chevrolet Silverado 2500 HD
2003-2004 Chevrolet Silverado 3500
2003-2004 GMC Sierra 1500
2003 GMC Sierra 1500 HD
2003-2004 GMC Sierra 2500 HD
2003-2004 GMC Sierra 3500

Genuine GM Part Number: 15190983