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2019-2023 Sierra/Silverado: 4X4 Transfer Case Oil Change

How to change the 4X4 transfer case fluid on a 2019-2023 Chevy Silverado/GMC Sierra. Same process for the Yukon, Tahoe, Suburban, and Denali; 2019, 2020, 2021, 2022, and 2023. Heat and load exposure are the determining factors for service interval. Obviously, doing the service early and regular can minimize breakdown of the fluid, preventing gear-wear and contamination that lead to seal, bearing, and/or electrical component failure. In general, an interval of 30-60,000 miles is recommended with the range dependent on driving conditions, ie. heavy start/stop traffic, towing, and extensive 4X4 operation.

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Disposable Gloves

8mil disposable work gloves

3/8 Inch Drive Hex Bit Socket Set

3/8 in. drive hex bit sockets: 3, 4, 4.5, 5, 5.5, 6, 7, 8, 9, 10 mm

3/8" Torque Wrench

10 - 100 ft lb 3/8" drive torque wrench.


Aerosol brake and parts cleaner

Disposable Shop Towels

Scott Blue Shop Towels in a Box

AC Delco Dexron VI

DEX VI Full Synthetic Automatic Transmission Fluid

Medium Threadlocker

Permatex Medium Strength Threadlocker BLUE

Bottle Pump

Quart and gallon bottle pump

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