FedEx letter below re GM Program Number 18125:
Your vehicle is involved in Customer Satisfaction Program 18125.
Dear General Motors Customer:
Previously, you were notified that your 2017 model year Chevrolet Bolt EV vehicle was involved in product field action 18097. This field action involves the reprogramming of the Hybrid Powertrain Control Module 2 to correct a battery "state of charge" detection issue. Specifically, the previous software may not have detected the difference in the charge level between the cell groups of the battery and over predict the indicated battery range. This condition may result in a loss of vehicle propulsion.
Our records indicate that you have already had this correction performed on your vehicle, which we greatly appreciate. However, as part of our continuous product improvement process, enhanced software for your vehicle has been developed and is now available. This supplemental software will increase the accuracy of your vehicle's range estimator, so if you experience a cell low voltage condition, you should observe a reduced battery range in real time and be able to navigate to a safe place to have your vehicle serviced.
Therefore, we are asking customers who received the previously released software update to schedule another service appointment with their Chevrolet dealer to receive this latest software update. Again, this improved software will increase the accuracy of your vehicle's range estimator, in addition to providing more warning in the event of a cell low voltage condition.
We know it may be a nuisance for you to service your vehicle again so soon, but we want to make sure that you have the best possible software as soon as it is available.
Even though we still expect only a small percentage of vehicles to be affected by this battery cell quality issue, please contact your Chevrolet dealer to schedule a service appointment as soon as possible. The dealer will reprogram your vehicle with the latest updated software. This service will be performed for you at no charge until May 31, 2020. After that, any applicable warranty coverage will apply.
If you have any questions or concerns that your dealer is unable to resolve, please contact the appropriate Customer Assistance Center at the number listed below.
Division Number Text Telephones
Chevrolet 1-800-222-1020 1-800-833-2438
Puerto Rico - English 1-800-496-9992
Puerto Rico - Español 1-800-496-9993
Virgin Islands 1-800-496-9994
We sincerely regret any inconvenience or concern that this situation may cause you. We want you to know that we will do our best, throughout your ownership experience, to ensure that your Chevrolet Bolt EV provides you with many miles of enjoyable driving.
North America Contact Center Operations
GM Program Number: 18125
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