Whatever 0W20 that meets Dexos1-Gen2: Mobil1 EP or AFE, Pennzoil Platinum, or whatever else you find that meets the spec. Plenty of options.
PF63 is the ACDelco filter spec'd for both engines. Very common filter with many cross-references across pretty much all brands.
Personally, I'd run Mobil1 EP 0W20 and a Delco UPF63R filter.