Chevrolet Corvette 2020–2023 — technical service bulletin
Bulletin 21-NA-123 · NHTSA communication 10231385 · issued Jan 17, 2023
Technical service bulletin
communication type
Engine and Engine Cooling
component
2020–2023
model years
4
vehicle entries
Official summary
This service bulletin provides a repair procedure to correct a customer concern of a Rough Idle condition and Malfunction Indicator Lamp (MIL) Illuminated.
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.