Cadillac U363B
U3620, U3622, U3624, U3626, U3628, U362A, U362C
Quick answer
For a 2023–2024 Cadillac LYRIQ in the US, U363B is listed in the supplied diagnostic record with the canonical text “U3620, U3622, U3624, U3626, U3628, U362A, U362C.” The supplied official bulletin evidence states that U363B was removed from PIE0788 on June 10, 2024. No fault definition, drivability decision, charging decision, or repair procedure is established by the supplied evidence.
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 U363B mean?
For a 2023–2024 Cadillac LYRIQ in the US, U363B is listed in the supplied diagnostic record with the canonical text “U3620, U3622, U3624, U3626, U3628, U362A, U362C.” The supplied official bulletin evidence states that U363B was removed from PIE0788 on June 10, 2024. No fault definition, drivability decision, charging decision, or repair procedure is established by the supplied evidence.
2. Technical explanation
The diagnostic record identifies U363B as a Cadillac DTC and associates it with the canonical title and meaning “U3620, U3622, U3624, U3626, U3628, U362A, U362C.” This record does not provide a component-level description or an interpretation of what U363B indicates. NHTSA-hosted manufacturer communication PIE0788B, published June 10, 2024, states that U363B was removed from the bulletin’s keywords. The later PIE0788C communication, published June 28, 2024, also states that U363B had been removed and that the need for gathering further information had ended. The supplied evidence does not state why U363B was removed, identify a confirmed fault cause, or provide a corrective action for U363B.
3. What system is affected?
Not yet established by verified evidence.
4. How serious is this code?
Unknown. The supplied diagnostic record lists severity as unknown.
5. Symptoms you may notice
- Not yet established by verified evidence.
6. Possible causes
- Not yet established by verified evidence.
7. Can I still drive the vehicle?
Unknown. The supplied diagnostic record lists safe-to-drive status as unknown.
8. Can I charge the vehicle?
Unknown. The supplied diagnostic record lists safe-to-charge status as unknown.
9. What you can safely do
- Arrange diagnosis by a qualified Cadillac/GM service facility if the DTC is present or warning messages are displayed.
- Do not attempt high-voltage system diagnosis or repair based on this information; no high-voltage repair procedure is provided by the verified evidence.
10. Step-by-step troubleshooting
- Not yet established by verified evidence. The supplied official communications do not provide a U363B diagnostic test sequence or repair instruction.
11. When to contact service
Service requirement is listed as unknown in the supplied diagnostic record. A qualified Cadillac/GM service facility can determine the current code status and applicable service information for the vehicle.
12. What the service center may check
- Not yet established by verified evidence.
13. Possible repair or resolution
- Not yet established by verified evidence.
14. Affected vehicles
- Cadillac LYRIQ · 2023–2024 · US
15. Related TSBs / service bulletins
- PIE0788B, NHTSA Manufacturer Communication PDF 11004345, published June 10, 2024: states that U363B was removed from the bulletin’s keywords. It lists U3620, U3622, U3624, U3626, U3628, U362A, and U362C as additional keywords.
- PIE0788C, NHTSA Manufacturer Communication PDF 11004943, published June 28, 2024: states that U363B was removed on June 10, 2024, and that the need for gathering further information had ended.
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Official NHTSA-hosted manufacturer communications: PIE0788B (https://static.nhtsa.gov/odi/tsbs/2024/MC-11004345-0001.pdf) and PIE0788C (https://static.nhtsa.gov/odi/tsbs/2024/MC-11004943-0001.pdf). Verified applicability in the supplied record: 2023–2024 Cadillac LYRIQ, US.
19. Frequently asked questions
What does Cadillac code U363B mean?
The supplied diagnostic record gives the canonical meaning as “U3620, U3622, U3624, U3626, U3628, U362A, U362C.” A component-level fault definition is not yet established by verified evidence.
Does PIE0788 apply to U363B?
The supplied evidence says U363B was removed from PIE0788 on June 10, 2024. It does not provide a U363B repair or diagnostic procedure.
Can I drive or charge with U363B?
Not yet established by verified evidence. Both safe-to-drive and safe-to-charge statuses are recorded as unknown.