You could go with the SOS Universal Undercovers in the fog lights if you wanted to. You can't do the SOS R4s since they are 4" in diameter, not 3.5"...
The Predator IIs would work great for you if you are wanting something larger than the Ghost. I'd just do one on each side of the GMC emblem, but you...
The Sound Off LED3s are awesome little lights. These modules are used in Sound Off's UltraLite products and their LED3 mini bar. If you want a larger...