The purpose of this study is to investigate an anticancer immunotherapeutic, AGS-003, when used in combination with sunitinib (the treatment regimen) in a single-stage, Phase II design in subjects with previously untreated advanced stage RCC after nephrectomy/excisional biopsy/metastasectomy. AGS-003 is formulated using mature DCs co-electroporated with CD40L IVT RNA and autologous total tumor RNA