Chevrolet Volt 2016–2019 — technical service bulletin
Bulletin PIC6504 · NHTSA communication 10237661 · issued May 16, 2023
Technical service bulletin
communication type
Power Train
component
2016–2019
model years
4
vehicle entries
Official summary
This Preliminary information communicates that some on the Transmission were built without a TUN and what the steps are to program the Transmission.
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.