Chevrolet Impala 2014–2020 — technical service bulletin
Bulletin PIC6460 · NHTSA communication 10213813 · issued May 24, 2022
Technical service bulletin
communication type
Electrical System
component
2014–2020
model years
7
vehicle entries
Official summary
This Preliminary information communicates that the coolant temperature sensor may leak coolant and wick into the ECM connector possibly causing a Hood Ajar message, CEL and a P257D.
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.