...or maybe G80 for the "gov-lock" differential. Put that in the search and you can read arguments about this one for days!!
2004.5 Silverado 3500 SRW 4x4, D/A (LLY), Ext. Cab, Long Bed
TxC V2 aux radiator w/Fan (leaked after 12 yrs
), engineer837 aux rad
, TxC CAI, LBZ MP, Scangauge II, Nicktane aux filter head, KD lift pump, 2008 PS pump, 2011 hydroboost, Frederico Swaybars, Rancho 9000XL, Torklift StableLoads, BFG AT/KO2, Lance 835 Camper often in the bed.