Join Date: Dec 2010
Location: Homestead, Florida
Okay it looks like you have the blank panel. The ACDelco part number is D1532H. The GM part number is 10376345. Probably the cheapest place to buy one, is from rockauto.com. Their price is $16.10. They will also ship to most anywhere.
On the RockAuto website, find your truck. Then look for -Electrical-Switch & Relay, then -Interior Light Switch.
You can also do a part number search there.
amazon.com has a pretty good picture of the panel, just search the part number.