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Chevrolet U1615

If customer concern is related to one of the symptoms below, verify customers radio is at the

DriveUnknown. The supplied diagnostic record lists safe to drive as unknown.
ChargeUnknown. The supplied diagnostic record lists safe to charge as unknown.
ServiceContact a Chevrolet/GM service provider for diagnosis when U1615 remains Active after the manufacturer-specified recheck or when the associated radio-related concern persists.
Confidence95%

Quick answer

For applicable U.S. Chevrolet vehicles, U1615 is addressed in GM/NHTSA manufacturer communications concerning radio-related diagnostics. Verified evidence states that U1615 can set because of a software anomaly in certain circumstances and, in the cited PIT6393 communications, the radio should not be replaced for U1615 on that basis. Active U1615 requires the applicable GM SI diagnostic procedure.

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 U1615 mean?

For applicable U.S. Chevrolet vehicles, U1615 is addressed in GM/NHTSA manufacturer communications concerning radio-related diagnostics. Verified evidence states that U1615 can set because of a software anomaly in certain circumstances and, in the cited PIT6393 communications, the radio should not be replaced for U1615 on that basis. Active U1615 requires the applicable GM SI diagnostic procedure.

2. Technical explanation

The supplied record’s canonical wording is incomplete: “If customer concern is related to one of the symptoms below, verify customers radio is at the.” The verified manufacturer-communication evidence links U1615 to radio diagnostics. PIT6393 revisions state that U1615 may set due to a software anomaly and instruct technicians to ignore it and not replace the radio for the listed DTCs, including U1615. Separately, PIT6503D/E instructs a 12-volt disconnect and DTC recheck; if U1615 remains Active after DTC clearing, technicians are directed to GM SI procedure 6535776 for U1615 diagnosis. The evidence supplied does not establish the exact fault definition, a component-level root cause, or the complete symptom list.

3. What system is affected?

Radio/infotainment diagnostics are established by the supplied manufacturer communications. No high-voltage EV system involvement is 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. The available record refers to customer symptoms but does not provide the symptom list.

6. Possible causes

  • A software anomaly is identified in PIT6393 communications as a reason U1615 may set.
  • For U1615 that remains Active after the specified recheck, the underlying cause is not established by the supplied evidence; GM SI procedure 6535776 is referenced for diagnosis.

7. Can I still drive the vehicle?

Unknown. The supplied diagnostic record lists safe to drive as unknown.

8. Can I charge the vehicle?

Unknown. The supplied diagnostic record lists safe to charge as unknown.

9. What you can safely do

  • Arrange diagnosis with a Chevrolet/GM service provider if U1615 is Active or if there is a radio-related customer concern.
  • Do not assume that U1615 identifies a high-voltage or charging-system problem; that relationship is not established by the supplied evidence.
  • Do not replace the radio solely because U1615 is present in the PIT6393 software-anomaly scenario.

10. Step-by-step troubleshooting

  1. GM’s PIT6503D/E workflow calls for a 12-volt disconnect and DTC recheck.
  2. After DTC clearing, if U1615 remains Active, GM directs technicians to SI procedure 6535776 for U1615 diagnosis.
  3. If U1615 is not Active after the specified recheck, PIT6503D/E directs the technician to continue its diagnostic workflow, including a check for Active B1A05 from the B174W Front View Camera module.

11. When to contact service

Contact a Chevrolet/GM service provider for diagnosis when U1615 remains Active after the manufacturer-specified recheck or when the associated radio-related concern persists.

12. What the service center may check

  • Confirm whether U1615 is Active after the 12-volt disconnect and DTC clearing/recheck specified in PIT6503D/E.
  • If Active, follow GM SI 6535776, as directed by PIT6503D/E.
  • When following PIT6503D/E and U1615 is no longer Active, continue the bulletin workflow, including checking whether B1A05 is Active in the B174W Front View Camera module.
  • Assess whether the vehicle falls under the PIT6393 radio software-anomaly guidance before considering radio replacement.

13. Possible repair or resolution

  • For the PIT6393 software-anomaly scenario, the verified guidance is to ignore U1615 and not replace the radio for that DTC.
  • For Active U1615 after the specified recheck, the repair resolution is not provided in the supplied evidence; GM SI 6535776 is the referenced diagnostic path.

14. Affected vehicles

15. Related TSBs / service bulletins

  • PIT6503E, NHTSA manufacturer communication MC-11036709-0001, published August 27, 2026: directs a 12-volt disconnect and recheck; Active U1615 is referred to SI 6535776.
  • PIT6503D, NHTSA manufacturer communication MC-11036400-0001, published August 21, 2026: same cited U1615 diagnostic direction.
  • PIT6393J, NHTSA manufacturer communication MC-11029962-0001, published March 6, 2026: identifies U1615 among DTCs that may set due to a software anomaly; do not replace the radio for those DTCs.
  • PIT6457B, NHTSA manufacturer communication MC-11027686-0001, published January 12, 2026: lists U1615 among radio-related DTC keywords.
  • PIT6393H, MC-11026861-0001; PIT6393F, MC-11024704-0001; PIT6393E, MC-11024438-0001; PIT6393D, MC-11023907-0001; and PIT6393C, MC-11023342-0001: prior revisions containing the cited radio software-anomaly guidance.

16. Recall information

  • Not yet established by verified evidence. No recall information was supplied.

17. Official manufacturer information

Official NHTSA-hosted manufacturer communications supplied: https://static.nhtsa.gov/odi/tsbs/2026/MC-11036709-0001.pdf and https://static.nhtsa.gov/odi/tsbs/2026/MC-11029962-0001.pdf

19. Frequently asked questions

Does U1615 mean the radio must be replaced?

No, not in the PIT6393 software-anomaly scenario. The supplied PIT6393 evidence explicitly says not to replace the radio for U1615 and other listed DTCs.

What if U1615 remains Active?

PIT6503D/E directs technicians to GM SI procedure 6535776 for U1615 diagnosis after the specified 12-volt disconnect, DTC clearing, and recheck.

Is U1615 proven to affect driving or charging?

No. The supplied record marks driving and charging safety as unknown, and the evidence does not establish an effect on either.

Which vehicles are covered by the supplied applicability data?

U.S. Chevrolet Blazer, Bolt EV, and Bolt EUV model years 2023–2026, plus Chevrolet Equinox entries spanning 2023–2026, are listed. The supplied data includes overlapping Equinox applicability entries.

20. Sources & verification

Verified
Chevrolet U1615: If customer concern is related to one of the symptoms… | EV Diagnostics