Air Injection Check Valve is a direct fit for the following:

1998-2001 Chevrolet Blazer
1998-1999 Chevrolet C1500
2001-2002 Chevrolet C3500
2001 Chevrolet Cavalier
1998-1999 Chevrolet K1500
1998-2001 Chevrolet S10
2001 Chevrolet Silverado 2500
2001 Chevrolet Silverado 3500
1998-2000 Chevrolet Tahoe
2001-2002 GMC Savana
2001 Pontiac Sunfire