2021 Chevrolet Bolt EV Technical Service Bulletins

506 technical service bulletins (TSBs) are on record for the 2021 Chevrolet Bolt EV. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 11037555Sep 26, 2026Other or unknown. This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
• 11037253Sep 4, 2026Other or unknown. This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
• 11036392Aug 20, 2026Other or unknown. This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
• 11036284Aug 19, 2026Other or unknown. Certain vehicles may have a condition where a false diagnostic trouble code (DTC) is set. Dealers are to reprogram the Hybrid Powertrain Control Module 2.
• 11035340Jul 21, 2026Other or unknown. PI to help diagnose A/C concern
• 11034769Jun 23, 2026Other or unknown. This Preliminary information communicates an issue with an OTA pending message still displayed after an OTA event and how to reset/clear the message.
• 11032764May 11, 2026Other or unknown. Pi created to provide GM dealers with information on gathering information for projection issue
• 11032763May 11, 2026Other or unknown. This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
• 11030974Apr 1, 2026Other or unknown. This preliminary information communicates information about how to determine if a wheel and tires size change is available.
• 11030532Mar 21, 2026Other or unknown. Improvements to OnStar functionality.
• 11030092Mar 9, 2026Other or unknown. This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a Technical Assistance Case in CX Connect.
• 11030091Mar 9, 2026Other or unknown. This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
• 11029444Mar 3, 2026Other or unknown. 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.
• 11029950Mar 2, 2026Other or unknown. This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC'ss
• 11028977Feb 5, 2026Other or unknown. Improvements to OnStar functionality. During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior when an update package is onboard the vehicle. Do not service your vehicle during installation.
• 11027786Jan 27, 2026Other or unknown. Certain vehicles may have a condition where a false diagnostic trouble code (DTC) is set. Dealers are to reprogram the Hybrid Powertrain Control Module 2.
• 11027697Jan 16, 2026Other or unknown. This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC's
• 11027665Jan 15, 2026Other or unknown. Certain vehicles listed above may have a condition where a false diagnostic trouble code (DTC) is set. Dealers are to reprogram the Hybrid Powertrain Control Module 2.
• 11027701Jan 14, 2026Other or unknown. This PI advised dealer technicians of possible causes of diesel fuel contamination in gasoline powered vehicles and advises of warranty direction.
• 11027601Jan 8, 2026Other or unknown. This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
• 11025755Nov 20, 2025Other or unknown. This Preliminary Information communication provides information to the technician about vehicles that have had multiple repair attempts that are being performed on customer’s vehicles that exhibit vibration conditions without utilizing the support of General Motors Technical Assistance Center.
• 11024460Oct 18, 2025Other or unknown. This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC's
• 11024455Oct 17, 2025Other or unknown. This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC's
• 11024458Oct 16, 2025Other or unknown. This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
• 11024439Oct 4, 2025Other or unknown. The Driver Information Center may display a message of Transport Mode On after the ignition is cycled.
• 11023091Sep 9, 2025Other or unknown. New Vehicle Monitoring Programs Section in IVH
• 11024324Sep 4, 2025Fuel system, Electrical system. This Warranty Administration service bulletin provides Lithium-Ion battery Exchange Process and Transaction Submission information.
• 11022084Aug 14, 2025Other or unknown. This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
• 11021792Aug 7, 2025Other or unknown. This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3060, B3935, C0750, C0755, C0760, C0765, and/or C0775.
• 11020816Jul 18, 2025Other or unknown. This PI communicates the requirement to provide a pico file to receive diagnostic assistance from TAC.
• 11020809Jul 18, 2025Other or unknown. This PI communicates the requirement to provide a pico file to receive diagnostic assistance from TAC.
• 11019670Jun 20, 2025Other or unknown. Amendments to the Song-Beverly Act (SBA) California warranty law provides vehicle owners with an opportunity to submit a written notice to GM before filing a lawsuit seeking a vehicle repurchase. If such a notice is not provided to GM, then the vehicle owner is prevented from seeking civil penalties in litigation. Vehicle owners of the affected vehicles will be mailed an owner’s manual and warranty insert…
• 11019591Jun 17, 2025Other or unknown. Amendments to the Song-Beverly Act (SBA) California warranty law provides vehicle owners with an opportunity to submit a written notice to GM before filing a lawsuit seeking a vehicle repurchase. If such a notice is not provided to GM, then the vehicle owner is prevented from seeking civil penalties in litigation. Vehicle owners of the applicable vehicles will be mailed an owner’s manual and warranty insert…
• 11019823Jun 10, 2025Other or unknown. This Preliminary information communicates assistance in locating the Rear seat belt comfort guides in the parts catalog.
• 11019693Jun 9, 2025Other or unknown. This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
• 11026104Jun 7, 2025Wheels. This service bulletin provides information on Tire Sidewall Irregularities.
• 11019074May 30, 2025Other or unknown. This Preliminary Information communication provides information to the technician about the use of J-35616-64B and Mini 50 terminal test probe, replacement terminals, and terminated leads.
• 11019073May 30, 2025Other or unknown. This Preliminary Information communication provides information to the technician about the use of J-35616-64B and Mini 50 terminal test probe, replacement terminals, and terminated leads.
• 11019072May 30, 2025Other or unknown. This Preliminary Information communication provides information to the technician about the use of J-35616-64B and Mini 50 terminal test probe, replacement terminals, and terminated leads.
• 11018659May 22, 2025Other or unknown. This Preliminary information communicates an issue with an OTA pending message still displayed after an OTA event and how to reset/clear the message.
• 11023388May 15, 2025Electrical system, Fuel system. This engineering information (EI) will assist GM to recover a small number of electric vehicle battery packs from customer-owned vehicles in the field for further engineering study and analysis.
• 11024496May 14, 2025Fuel system, Electrical system. This service bulletin provides dealers with Warranty Administration information on North American Charging Standard (NACS) DC Adapter Warranty Claim Information.
• 11023365May 14, 2025Fuel system, Electrical system. This Warranty Administration service bulletin provides Lithium-Ion battery Exchange Process and Transaction Submission information.
• 11023051May 8, 2025Forward collision avoidance. This service bulletin provides information for the technicians to use a Customer Concern Verification sheet to facilitate the questions needing to be answered by the customer regarding Automatic Emergency Braking (AEB) issues.
• 11019516Apr 17, 2025Suspension, Transmission and drivetrain, Steering. This preliminary informational (PI) bulletin provides information to dealership personnel that may be helpful when addressing underbody component corrosion with customers.
• 11016990Apr 12, 2025Other or unknown. This Preliminary information communicates a "Forward Collision System Reduced" message displayed on the DIC when the Forward Automatic Braking has been set to the "Alert" setting. This is normal when the FAB has been set to "Alert".
• 11017839Apr 8, 2025Other or unknown. This warranty administration bulletin provides policy information for GM courtesy transportation and roadside assistance programs.
• 11017595Apr 3, 2025Electrical system. This service bulletin provides information on the proper Reflective High Temperature Heat and/or Insulating Tape to use for certain repairs, such as Wiring Harness Repairs.
• 11017517Apr 3, 2025Fuel system, Electrical system. This service bulletin provides repair information to correct a customer concern of a Malfunction Indicator Lamp (MIL) illuminated in Driver Information Center (DIC), a Reduced Propulsion message, and charging limited to 30% State of Charge (SOC).
• 11017244Mar 31, 2025Electrical system. The intent of this service bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple customer concerns that do not have other diagnostic methods to identify them.

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