Chevrolet Silverado 2500 2024 — technical service bulletin
Bulletin 23-NA-066 · NHTSA communication 10240228 · issued Jul 27, 2023
Technical service bulletin
communication type
Engine and Engine Cooling
component
2024
model years
4
vehicle entries
Official summary
This technical bulletin provides a procedure to correct the condition of Malfunction Indicator Lamp Illuminated with DTC P0402 Set.
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.