Shop Manual for '22 gen 6
That's the first thing I did. Only options there are to buy a second copy of the owner's manual. GM is a lot more aggressive now about trying to drive people to the dealer. Manual tells you to change the differential fluid before taking it to the track. Directs you to a page in the manual that specifies part numbers , fluids and capacities. Under differential it indicates "see dealer". It also specifies adding extra trans fluid before track use but then says the dealer has to do it as it is complicated. Wtf.
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