2019-2024 Sierra/Silverado: Rear Differential Service

How to change the rear differential oil on a 2019-2023 GM 1500 chassis. 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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AAM/SU7 Rear Axle (most common)
Gasket 22943110 (AAM/SU7) amzn.to/44mNIY5
75W-85 10-4091 (AAM/SU7) amzn.to/3nreZI2
GM/SU8 Rear Axle
Gasket 84412728 (GM/SU8) not currently available on Amazon
75W-85 10-4122 (GM/SU8) not currently available on Amazon
Blue Thread Locker amzn.to/3VsNvhP
Bottle Pump amzn.to/3HEwEmB
Brakleen amzn.to/3ntSQZG
Oil Can amzn.to/44uQnyI
Quality Torque Wrench amzn.to/3NFBJib
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The service procedure is the same for several models and years, including; Sierra, Silverado, Yukon, Tahoe, Suburban, Denali, and Escalade. 2019, 2020, 2021, 2022, 2023,2024.
CHAPTERS
0:00 Axle Identification
0:30 Fluid level & condition check
0:50 Drain & Clean
1:47 Threadlocker & Install
2:30 Fluid Type & Capacity
2:58 Final Level Check