How do you add fluid to the transfer case?

Asked by Mar 27, 2007 at 08:11 PM about the 2000 Chevrolet Blazer 4 Door LT 4WD

Question type: Maintenance & Repair

The service 4wdr light is on, and it won't go into 4hi.

3 Answers

3,165

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

1 of 1 people found this helpful.

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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