Cadillac Escalade 2021–2023 — technical service bulletin
Bulletin 21-NA-028 · NHTSA communication 10234143 · issued Mar 22, 2023
Technical service bulletin
communication type
Power Train
component
2021–2023
model years
15
vehicle entries
Official summary
This technical bulletin provides a procedure to replace the rear differential fluid to correct the rear clutches from chattering, which create a moan type noise.
Vehicles covered
- 2021 Cadillac Escalade
- 2022 Cadillac Escalade
- 2023 Cadillac Escalade
- 2021 Cadillac Escalade NA
- 2021 Chevrolet Suburban
- 2022 Chevrolet Suburban
- 2023 Chevrolet Suburban
- 2021 Chevrolet Suburban 1500
- 2022 Chevrolet Suburban 1500
- 2021 Chevrolet Tahoe
- 2022 Chevrolet Tahoe
- 2023 Chevrolet Tahoe
- 2021 GMC Yukon
- 2022 GMC Yukon
- 2023 GMC Yukon
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.