How do you add fluid to the transfer case?
The transfer case has 2 plugs, an upper and a lower. The upper is the "fill" and the lower is to drain. If you are going to go there, just drain and refill with all new fluid. The plugs usually take a 3/8" or a 1/2" ratchet to open. You will see the female square holes
Thanks for the reply. I think it has solved my problem.
Yes... But the '99 blazer takes a 10mm allen socket for both.
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