12395557 "deflector pkg". Incledes center (which needs to be notched for intercooler opening), and both small outer airdams. If I remember correctly they are only around $30-$35 from GM.
Thanks for the #. They are $21.35 from gmpartsdirect.com There is a set on ebay going for over $50 right now...crazy and several more with $32 or $38 buy it now price.