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Old 02-08-2020, 10:24 PM   #3 (permalink)
OKMillerTime
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Join Date: Oct 2019
Location: central OK
Posts: 29

Look in the owners manual to verify, but I believe the 2011 on up 2500hd trucks use a synthetic GL4 gear lube like 80/90. Last one I did took 2-3 quarts. I'm unsure what differences if any, there are between your transfer case and the 2011 thru 2019 trucks.

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