Chevrolet Silverado 1500 2019–2024 — technical service bulletin
Bulletin 21-NA-089 · NHTSA communication 11004999 · issued Jul 11, 2024
Technical service bulletin
communication type
Service Brakes
component
2019–2024
model years
12
vehicle entries
Official summary
This technical bulletin provides a procedure to replace the rear calipers if found packed for of mud and debris.
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.