Chevrolet Silverado 1500 2022–2024 — technical service bulletin
Bulletin PIT6474A · NHTSA communication 11029443 · issued Feb 27, 2026
Technical service bulletin
communication type
Unknown OR Other
component
2022–2024
model years
6
vehicle entries
Official summary
This PI addresses an issue where the customer may experience a loss of brake assist, accompanied by numerous MILs and warnings, after the engine has started, caused by a drop in battery voltage to the Brake System Control module. Dealers are to clean and tighten battery cable connections, test the vehicle battery and charging system, and update the Brake System control module with updated software.
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.