Cadillac Escalade 2021–2022 — technical service bulletin
Bulletin 21-NA-028 · NHTSA communication 10230610 · issued Jan 10, 2023
Technical service bulletin
communication type
Power Train
component
2021–2022
model years
11
vehicle entries
Official summary
This technical bulletin provides a procedure to replace the rear diff fluid to correct the rear clutches from chattering, which create a moan type noise.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.