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2019-2023 Sierra/Silverado: Rear Differential Service

How to change the rear differential oil on a 2019-2023 GM 1500 chassis, including Sierra, Silverado, Suburban, Tahoe, and Yukon. There are two production options (RPO's), SU7 and SU8. The SU7 is manufactured for GM by American Axles & Manufacturing (AAM), while the SU8 is produced by GM. This video showcases the service procedure while highlighting differences in axle identification, part numbers, fluid types, and capacities.

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Disposable Gloves

8mil disposable work gloves


Piston pump oiler. Wide base for stability. Straight Spout.

Rear Differential Gasket

AAM/SU7 Rear differential gasket. PN 22943110

Medium Threadlocker

Permatex Medium Strength Threadlocker BLUE

Bottle Pump

Quart and gallon bottle pump

Disposable Shop Towels

Scott Blue Shop Towels in a Box

3/8" Torque Wrench

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

AC Delco 75W-85

AAM/SU7 10-4091 Rear Axle Lubricant. 75W-85


Aerosol brake and parts cleaner

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