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2019-2024 Sierra/Silverado: 4X4 Transfer Case Oil Change

Time: 15-30 min

Difficulty - easy

Cost - $20-40


The transfer case is mounted directly to the back of the transmission. Constant rotation of at least some internal parts is always taking place. Wear, 4X4 use, and venting to the atmosphere can bring-in moisture and contaminants leading to gasket failure and corrosion. Fresh fluid keeps seals clean and metal parts happy.


Replace your transfer case fluid every 30-60,000 miles. The range depends on factors such as off-roading, snow, towing, temperature extremes, etc.

Watch the video below to see the process, specs, and capacities for the 4X4 transfer case service on a 2019-2023 Chevy Silverado/GMC Sierra. Same process for the Yukon, Tahoe, Suburban, and Denali; 2019, 2020, 2021, 2022, 2023, 2024.

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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

ACDelco 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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