my 16 silverado just turned over 45k, following the severe maintenance schedule it says I should do transfer case, trans blah blah. I have already done brake fluid when I put powerstops on. My dealership has done my last few oil changes and tire rotations just for convenience and price is not terrible. 2016 1500 z71, which fluid for the transfer case? (auto trax or dex vi) what do you recommend for the diffs also? Dealership quoted 497 for a 4x4 system service! I don't know what the hell else other than changing the fluids they can be doing for $500. I though I would be able to slide this in next week as we are having our second child tomorrow and this could get finished while Im off work but 750$ for trans, transfer case and diff service seems high as willie. opinions welcome please. If i am lucky this delivery will go smooth, grandmas will come visit and I can slide out to the garage for a few hours