Compatible with GMC: 2002-2007 Envoy L6 4.2L, 2003-2006 Envoy XL L6 4.2L, 2004-2005 Envoy XUV L6 4.2L, 2004-2007 Canyon L5 3.5L/3.7L. Compatible with Chevrolet: 2003-2007 Trailblazer L6 4.2L, 2003-2006 Trailblazer EXT L6 4.2L, 2004-2007 Colorado L5 3.5L/3.7L, 2006-2007 Impala V8 5.3L, 2006-2007 Monte Carlo V8 5.3L.
