2027 Chevrolet Bolt EV TSBs

Certain vehicles may have a condition in which the software that maintains the RESS battery pack may inadvertently cause a drain on the high voltage and low voltage batteries. Dealers are to program the Battery Energy Control Module then fully charge the high voltage battery to…

• Improved vehicle performance when driving in Reverse on slippery surfaces • Better One-Pedal Driving performance • Additional protection for battery health and prevention for battery drain • Improved accuracy for driver display messages • This update contains a required…

Certain vehicles may have a condition in which a fastener may be loose at the steering column to cockpit beam. Dealers will inspect the fasteners and torque them to the proper value.

• Additional protection for battery health and to help prevent battery drain • Improved charging messaging in the driver display • Improved vehicle diagnostics This update includes improvements to your battery health management system. We recommend you charge to 100% as soon as…

Certain vehicles may have a condition in which the software that maintains the RESS battery pack may inadvertently cause a drain on the high voltage and low voltage batteries. Dealers are to fully charge the high voltage battery to reset the cell balancing software.

Certain vehicles may have a condition in which a bolt(s) on the left or right side of the rear wheel hub may be incorrectly torqued. Dealers will inspect, and if necessary, replace the rear wheel hub bolt(s).

• Improvements to traction and stability control on uneven terrain • Improvements to braking performance on low-traction surfaces • Improvements to assisted braking • Improvements to active cabin ventilation • Additional protection for the health of your battery • Updates to…

• Fixes to help ensure responsiveness for the driver display and rear view camera. • Improvements to reliability for alerts and chimes. • Surround Vision Recorder, a new feature that allows you to record, watch, and save video from your vehicle's cameras.

• Improvements to diagnostics and service messaging for battery health, particularly in humid conditions. • Improvements to transmission diagnostics used for shifting. • Improvements to charging system diagnostics. • Fixes to help protect EV adapter from overheating while…

Certain vehicles may have been sold with a GM NACS Level 2 EV charging adapter (NACS to J1772) in which a quality issue was identified. Dealers are to provide the customer with the latest design charging adapter.

This Preliminary information communications information on a Short Range Radar software anomaly causing false / ghost left or right side object detection alerts.

This PI states that if SDGM DTC P0604/P0607 is set and no other SDGM DTCs are present, clear DTCs and reset the SDGM. Advises of how to contact PQC to authorize SDGM replacement.

This information addresses a potential software anomaly that may cause a MIL illumination, a Service High Voltage message on the IPC, and, when the DTC is current, a no-start condition while the vehicle is in Run/Propulsion mode. If one or more of the listed DTCs are stored in…

This PI explains that the T18, Battery charger drive power distribution control modules are on parts restriction thru TAC.

This information addresses a potential software anomaly that may cause a MIL illumination, a Service High Voltage message on the IPC, and, when the DTC is current, a no-start condition while the vehicle is in Run/Propulsion mode. If one or more of the listed DTCs are stored in…

This information addresses a potential software anomaly that may cause a MIL illumination, a Service High Voltage message on the IPC, and, when the DTC is current, a no-start condition while the vehicle is in Run/Propulsion mode. If one or more of the listed DTCs are stored in…

This preliminary information is to inform technicians and customers that the voice command will be inoperative when trying to open applications. Engineering is investigating and this PI will be converted to a bulletin when a repair is available.

This PI explains that the T18, Battery charger drive power distribution control modules are on parts restriction thru TAC.

This Preliminary information communicates to dealers a procedure to reset the radio.

This Preliminary information communicates to dealers a procedure to reset the radio.

This PI explains that the T18, Battery charger drive power distribution control modules are on parts restriction thru TAC.

This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC display

This Preliminary Information is to inform customers to follow diagnostics if resetting, disconnecting the module did not correct it.

This Preliminary information communicates to the technician the diagnostic direction needed when the customer complains of SuperCruise Subscription Required Message Displayed on Instrument Cluster.

This preliminary information communicates information about how to determine if a wheel and tires size change is available.

This Preliminary information communicates to the dealer the repair direction recommended by the engineers for correcting this noise complaint.

This Preliminary Information provides a repair direction to a technician, for a service high voltage system message with DTC P059F.

This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.

This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a Technical Assistance Case in CX Connect.

This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC'ss