Service bulletins for the 2020 Buick Encore
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.
654 on file from NHTSA, as of 2026-10-19.
About C15C9 on the 2020 Buick Encore: what the code means, and the bulletins and recalls about the same components.
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By component
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Only bulletins with trouble code: C15C9 are shown. Show all
| PIC6416A | 2020-06-15. Service bulletin. STRUCTURE. This Preliminary information communicates to the dealer that if the service AWD (All-Wheel Drive) or AWD (All-Wheel Drive) Off messages are on and there is a history DTC of C15C9 SYM02 set then no repairs are to be made at this time, a software issue was found and Engineering is working on a permanent solution. If the DTC is setting current then published diagnosis needs to be followed. |
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| PIC6416 | 2020-05-11. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates to the dealer that if the service AWD (All-Wheel Drive) or AWD (All-Wheel Drive) Off messages are on and there is a history DTC of C15C9 SYM02 set then no repairs are to be made at this time, a software issue was found and Engineering is working on a permanent solution. If the DTC is setting current then published diagnosis needs to be followed. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.