Chevrolet B389A
ment ID DTCs (B3924 00, B3925 00, B3926 00, B3927 00) current in the BCM
Quick answer
For a 2024 Chevrolet Blazer in the US, DTC B389A 00 current in the BCM is associated with three or more current Environment ID DTCs: B3924 00, B3925 00, B3926 00, and/or B3927 00.
This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.
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1. What does B389A mean?
For a 2024 Chevrolet Blazer in the US, DTC B389A 00 current in the BCM is associated with three or more current Environment ID DTCs: B3924 00, B3925 00, B3926 00, and/or B3927 00.
2. Technical explanation
Verified NHTSA manufacturer communication 23-NA-163 states that when B389A 00 is current, the BCM will have three or more current Environment ID DTCs from B3924 00, B3925 00, B3926 00, and B3927 00. The supplied evidence does not establish the underlying fault mechanism or a complete repair procedure.
3. What system is affected?
Body Control Module (BCM).
4. How serious is this code?
Not yet established by verified evidence.
5. Symptoms you may notice
- Three or more of B3924 00, B3925 00, B3926 00, and B3927 00 are current in the BCM when B389A 00 is current.
6. Possible causes
- Not yet established by verified evidence.
7. Can I still drive the vehicle?
Not yet established by verified evidence.
8. Can I charge the vehicle?
Not yet established by verified evidence.
9. What you can safely do
- Have a qualified Chevrolet service provider diagnose current BCM DTCs.
- Do not attempt high-voltage repairs based on this code.
10. Step-by-step troubleshooting
- Check whether DTC B389A 00 is current.
- If B389A 00 is not present, the cited manufacturer communication instructs disconnecting and reconnecting the battery for at least 30 seconds, then checking again for B389A.
- If B389A 00 is current, check the BCM for three or more current codes among B3924 00, B3925 00, B3926 00, and B3927 00.
11. When to contact service
Contact a Chevrolet dealer or qualified service provider for diagnosis of current BCM DTCs.
12. What the service center may check
- Confirm whether B389A 00 is current.
- Check BCM status for current B3924 00, B3925 00, B3926 00, and B3927 00.
- If B389A 00 is not present, perform the battery disconnect/reconnect check described in 23-NA-163, using appropriate service procedures.
13. Possible repair or resolution
- Not yet established by verified evidence.
14. Affected vehicles
- Chevrolet Blazer · 2024 · US
15. Related TSBs / service bulletins
- NHTSA Manufacturer Communication 23-NA-163, published August 13, 2024, describes the relationship between current B389A 00 and multiple current BCM Environment ID DTCs.
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Verified source: NHTSA Manufacturer Communication PDF 11007723, Chevrolet bulletin 23-NA-163: https://static.nhtsa.gov/odi/tsbs/2024/MC-11007723-0001.pdf
19. Frequently asked questions
What does B389A mean on a 2024 Chevrolet Blazer?
The verified evidence identifies B389A 00 as current when the BCM has three or more current Environment ID DTCs among B3924 00, B3925 00, B3926 00, and B3927 00.
Which vehicles does this evidence apply to?
The supplied applicability record identifies the 2024 Chevrolet Blazer for the US market.
Is it safe to drive or charge with B389A?
Not yet established by verified evidence.