Dunno CA. I do know if you go on amsoils website & put in your vehicle info. They'll show a rear diff fill capacity of 4.6 pints or = 2.3 quarts & thats what I was able to put in mine. I used their severe gear. Once my warranties are up I plan on swapping out all the lube covers I can IE trans pan & rear diff cover for the greater capacity fin cooled & drain plug serviceable covers that many after market companies make for these trucks. I know it's silly cause by swapping these items to ones that can hold more fluid that can be cooled w/ external fins as opposed to stock less efficient parts supplied by the automakers. These auto makers rely on any little changes to void a warranty in a hurry. Don't make much sense but it's reality. Good luck pal.