Service bulletins for the 2021 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.
506 on file from NHTSA, as of 2026-10-19.
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Only bulletins with component: Fuel tank are shown. Show all
| N232421260 | 2023-11-02. 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. |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.