Shroud & Fan. 2004-2006 GMC Canyon L4 2.8L. 2007-2012 GMC Canyon L4 2.9L. 2004-2006 GMC Canyon L5 3.5L. 2007-2012 GMC Canyon L5 3.7L. The fan shroud basically houses the fan blades securing it in place and keeping it from damaging the other engine components that may disturb the smooth and even operation of the engine.
