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Service bulletins for the 2020 Chevrolet Bolt EV

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

601 on file from NHTSA, as of 2026-10-19.

About U3636 on the 2020 Chevrolet Bolt EV: what the code means, and the bulletins and recalls about the same components.

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Only bulletins with trouble code: U3636 are shown. Show all

Bulletins, newest first
N2324212612025-02-24. Service campaign. UNKNOWN OR OTHER. Certain 2020 – 2022 model year Chevrolet Bolt EV and 2022 model year Chevrolet Bolt EUV vehicles may have a condition in which a false diagnostic trouble code (DTC), U3636 symptom 09, is triggered. This false DTC is resulting in customers experiencing a Malfunction Indicator Lamp (MIL) illuminated in the Driver Information Center (DIC), a Reduced Propulsion message, and a charging limited to 30% State of Charge. Since this is a false DTC, it can lead to unnecessary battery pack replacements. Dealers are to reprogram the Hybrid Powertrain Control Module 2 and provide the customer with a free NACS Adapter.
N2324212612025-02-06. Service campaign. UNKNOWN OR OTHER. Certain 2020 – 2022 model year Chevrolet Bolt EV and 2022 model year Chevrolet Bolt EUV vehicles may have a condition in which a false diagnostic trouble code (DTC), U3636 symptom 09, is triggered. This false DTC is resulting in customers experiencing a Malfunction Indicator Lamp (MIL) illuminated in the Driver Information Center (DIC), a Reduced Propulsion message, and a charging limited to 30% State of Charge. Since this is a false DTC, it can lead to unnecessary battery pack replacements. Dealers are to reprogram the Hybrid Powertrain Control Module 2 and provide the customer with a free NACS Adapter.
N242437530-012024-04-08. Service bulletin. ELECTRICAL SYSTEM. Service Update. Certain vehicles may have a condition in which a diagnostic trouble code (DTC) is set. IMPORTANT: If the vehicle comes in with the DTC U3620-U362E and U3630-U3636, with symptom 17 ALREADY set, go to SI and follow the published SI diagnostic/repair procedures. This field action DOES NOT apply to symptom 09. After above repairs are performed, come back to this field action to get the required warranty claim code and close this field action with labor operation 9107166. If the DTC is not set, proceed with this bulletin. Dealers are to reprogram the Hybrid Powertrain Control Module 2.
N2424375302024-04-03. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. Service Update - Certain vehicles may have a condition in which a diagnostic trouble code (DTC), U3620-U362E or U3630-U3636, symptom 17, is triggered. This DTC is resulting in customers experiencing a Malfunction Indicator Lamp (MIL) illuminated in the Driver Information Center (DIC), Reduced Propulsion with corresponding DIC message, and a charging limited to 30% State of Charge. IMPORTANT: If the vehicle comes in with the DTC U3620-U362E or U3630-U3636, symptom 17 set, go to SI and follow the published SI diagnostic/repair procedures. After above repairs are performed, come back to this field action to get the required warranty claim code and close this field action with labor operation 9107166. If the DTC is not set, proceed with this bulletin. Dealers are to reprogram the Hybrid Powertrain Control Module 2.
N232421260-012023-11-14. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Service Update - Certain vehicles may have a condition in which a false diagnostic trouble code (DTC), U3636 symptom 09, is triggered. This false DTC is resulting in customers experiencing a Malfunction Indicator Lamp (MIL) illuminated in the Driver Information Center (DIC), a Reduced Propulsion message, and a charging limited to 30% State of Charge. Since this is a false DTC, it can lead to unnecessary battery pack replacements. Dealers are to reprogram the Hybrid Powertrain Control Module 2.
N2324212602023-11-02. Service bulletin. UNKNOWN OR OTHER; ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:PROPULSION SYSTEM:HYBRID MANAGEMENT:POWER CONTROL UNIT/MODULE (HPCU):SOFTWARE; POWER TRAIN; FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY. Service Update - Certain vehicles may have a condition in which a false diagnostic trouble code (DTC), U3636 symptom 09, is triggered. This false DTC is resulting in customers experiencing a Malfunction Indicator Lamp (MIL) illuminated in the Driver Information Center (DIC), a Reduced Propulsion message, and a charging limited to 30% State of Charge. Since this is a false DTC, it can lead to unnecessary battery pack replacements. Dealers are to reprogram the Hybrid Powertrain Control Module 2.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.