Chevrolet U1008
GMNA) • Chinese language translation errors for utility rate schedule type and engine sound • Japanese language translation was incomplete • Korean language translation error for t
Quick answer
For a 2022 Chevrolet Bolt EV (US), U1008 is referenced in GM service communication 21-NA-188 as part of an infotainment/software update that improves Ethernet DTC diagnostic algorithms. The supplied evidence does not establish a conventional fault definition for U1008 or confirm a vehicle hardware failure.
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 U1008 mean?
For a 2022 Chevrolet Bolt EV (US), U1008 is referenced in GM service communication 21-NA-188 as part of an infotainment/software update that improves Ethernet DTC diagnostic algorithms. The supplied evidence does not establish a conventional fault definition for U1008 or confirm a vehicle hardware failure.
2. Technical explanation
NHTSA manufacturer communication 10215627 (GM bulletin 21-NA-188, published June 24, 2022) identifies an update to improve Ethernet DTC diagnostic algorithms for U1008, U18B4, and U0078. This establishes that U1008 can be involved in infotainment/network diagnostic logic on the applicable vehicle. The supplied evidence does not state the exact DTC definition, setting criteria, affected module, or a required repair beyond the referenced software-related bulletin.
3. What system is affected?
Infotainment/network diagnostic logic; the bulletin specifically refers to Ethernet DTC diagnostic algorithms.
4. How serious is this code?
Not yet established by verified evidence.
5. Symptoms you may notice
- Not yet established by verified evidence for U1008 specifically.
6. Possible causes
- The verified bulletin identifies Ethernet DTC diagnostic algorithms as an area improved by a software update.
- A specific underlying hardware, wiring, module, or communication cause for U1008 is 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
- Record any displayed warnings and the conditions when U1008 was retrieved.
- Arrange diagnosis with a Chevrolet/GM service provider and reference bulletin 21-NA-188 / NHTSA communication 10215627.
- Do not attempt high-voltage or network-module repairs based on this code alone.
10. Step-by-step troubleshooting
- Have a qualified service provider confirm whether the vehicle is eligible for the software update described in GM bulletin 21-NA-188.
- Have the provider retrieve and evaluate U1008 together with any accompanying DTCs and vehicle symptoms.
- The supplied evidence does not establish further owner-level troubleshooting steps.
11. When to contact service
Contact a Chevrolet/GM service provider for evaluation, particularly if U1008 is current, repeats, or occurs with other warnings or infotainment concerns.
12. What the service center may check
- Confirm applicability: 2022 Chevrolet Bolt EV, US market.
- Review GM bulletin 21-NA-188 / NHTSA manufacturer communication 10215627.
- Check for the infotainment/software update intended to improve Ethernet DTC diagnostic algorithms for U1008, U18B4, and U0078.
- Evaluate any accompanying diagnostic codes and reported symptoms.
13. Possible repair or resolution
- The verified source describes a software-related update that improves Ethernet DTC diagnostic algorithms for U1008, U18B4, and U0078.
- Whether that update resolves a particular U1008 occurrence is not yet established by verified evidence.
14. Affected vehicles
- Chevrolet Bolt EV · 2022 · US
15. Related TSBs / service bulletins
- GM bulletin 21-NA-188, published through NHTSA as Manufacturer Communication 10215627 on June 24, 2022. The supplied summary states that it improves Ethernet DTC diagnostic algorithms for U1008, U18B4, and U0078.
16. Recall information
- No recall is established by the supplied verified evidence.
17. Official manufacturer information
Official source: NHTSA Manufacturer Communication PDF 10215627, GM bulletin 21-NA-188: https://static.nhtsa.gov/odi/tsbs/2022/MC-10215627-0001.pdf
19. Frequently asked questions
What does U1008 mean on a 2022 Chevrolet Bolt EV?
The supplied verified evidence does not provide an exact DTC definition. It does show that GM bulletin 21-NA-188 addresses improved Ethernet DTC diagnostic algorithms for U1008.
Is U1008 related to charging or the high-voltage battery?
Not yet established by verified evidence.
Does U1008 mean the vehicle is unsafe to drive?
Not yet established by verified evidence.
Is there an official GM service bulletin related to U1008?
Yes. GM bulletin 21-NA-188, available as NHTSA Manufacturer Communication 10215627, references improved Ethernet DTC diagnostic algorithms for U1008, U18B4, and U0078.