[cleszkie]

I have a Blazer, and my grille shell is not chromed, but rather clear anodized polished aluminum. If yours is yellowing, that is a sign that it too is probably clear anodized aluminum, and the anodizing is discoloring (re-pop). If this is the case, you can remove the anodizing with Easy Off oven cleaner, and then re-polish and re-anodize it. Better yet, have it clear powder-coated.