Chevrolet Volt 2016–2018 — technical service bulletin
Bulletin N202307990 launc · NHTSA communication 10207742 · issued Feb 4, 2021
Technical service bulletin
communication type
Power Train
component
2016–2018
model years
3
vehicle entries
Official summary
Customer Satisfaction Program. Certain vehicles may have a condition related to the high voltage battery which could gradually lose the ability to maintain voltage. If battery concerns are not addressed, the vehicle could enter a reduced propulsion mode while driving, or lose propulsion, or it may not start. Dealers are to update the Hybrid Powertrain Control Module (HPCM2). This software update is intended to increase the amount of warning time provided.
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.