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Chevrolet U1516

NA-085 or 25-NA-183 please update the radio it should correct the issue, if the vehicle

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceService is appropriate because the verified guidance requires GM SI diagnostics and may require a radio software update. Whether service is immediately required is not yet established by verified evidence.
Confidence95%

Quick answer

For applicable 2024–2026 Chevrolet Equinox vehicles in the United States, U1516 is identified in GM bulletin PIT6393 revisions alongside radio-related diagnostic guidance. When U1516 is present with the listed related DTCs and the vehicle is eligible for the software in 25-NA-085 or 25-NA-183, the bulletin states that updating the radio should correct the issue.

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 U1516 mean?

For applicable 2024–2026 Chevrolet Equinox vehicles in the United States, U1516 is identified in GM bulletin PIT6393 revisions alongside radio-related diagnostic guidance. When U1516 is present with the listed related DTCs and the vehicle is eligible for the software in 25-NA-085 or 25-NA-183, the bulletin states that updating the radio should correct the issue.

2. Technical explanation

Verified evidence does not establish a generic SAE-style definition for U1516. The supplied official manufacturer-communication evidence instead links U1516 to GM radio diagnostic procedures in PIT6393. The bulletins direct technicians to follow SI diagnostics; when the listed DTC conditions are met and applicable radio software is available under 25-NA-085 or 25-NA-183, a radio update is specified as the corrective action expected to resolve the issue.

3. What system is affected?

Radio / infotainment system, based on the verified bulletin guidance.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • A specific customer-visible symptom for U1516 is not yet established by verified evidence.
  • PIT6393 includes U1516 among DTCs considered during radio diagnostic procedures.

6. Possible causes

  • A confirmed root cause is not yet established by verified evidence.
  • For the bulletin conditions described, radio software is implicated because the documented corrective action is a radio update under 25-NA-085 or 25-NA-183.

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

  • Arrange diagnosis with a Chevrolet dealer or qualified service facility.
  • Provide the technician with DTC U1516 and ask them to review PIT6393 and applicability of 25-NA-085 or 25-NA-183.
  • Do not assume radio replacement is required; the bulletin directs use of SI diagnostics and identifies a radio software update for qualifying conditions.

10. Step-by-step troubleshooting

  1. Have the stored DTCs confirmed with appropriate diagnostic equipment.
  2. Have the technician follow GM SI diagnostics as directed in PIT6393.
  3. If U1516 is present with the bulletin-listed DTC conditions, have the technician determine whether the vehicle can receive the software listed in 25-NA-085 or 25-NA-183.
  4. If eligible, have the radio updated by a qualified service facility.

11. When to contact service

Service is appropriate because the verified guidance requires GM SI diagnostics and may require a radio software update. Whether service is immediately required is not yet established by verified evidence.

12. What the service center may check

  • Confirm whether U1516 is stored with B1A1F.00, B1A1B.00, and/or U164E.
  • Follow GM SI diagnostics.
  • Determine eligibility for radio software identified in 25-NA-085 or 25-NA-183.
  • Perform the applicable radio software update when the bulletin conditions are met.

13. Possible repair or resolution

  • For the documented bulletin scenario, update the radio using the software listed in 25-NA-085 or 25-NA-183; PIT6393 states this should correct the issue.
  • If SI diagnostics instruct radio replacement, PIT6393 directs the technician to proceed with its specified next step. The supplied evidence does not establish the complete replacement procedure or when replacement is ultimately necessary.

14. Affected vehicles

15. Related TSBs / service bulletins

  • PIT6393C, NHTSA manufacturer communication MC-11023342-0001, published September 15, 2025.
  • PIT6393D, NHTSA manufacturer communication MC-11023907-0001, published October 1, 2025.
  • PIT6393E, NHTSA manufacturer communication MC-11024438-0001, published October 4, 2025.
  • PIT6393F, NHTSA manufacturer communication MC-11024704-0001, published October 23, 2025.
  • PIT6393H, NHTSA manufacturer communication MC-11026861-0001, published December 23, 2025.
  • PIT6393J, NHTSA manufacturer communication MC-11029962-0001, published March 6, 2026.
  • PIT6393K, NHTSA manufacturer communication MC-11032554-0001, published April 28, 2026.
  • PIT6393L, NHTSA manufacturer communication MC-11032781-0001, published May 14, 2026.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified applicability: Chevrolet Equinox, model years 2024–2026, United States. Official NHTSA-hosted manufacturer communications: https://static.nhtsa.gov/odi/tsbs/2026/MC-11032781-0001.pdf and https://static.nhtsa.gov/odi/tsbs/2026/MC-11029962-0001.pdf.

19. Frequently asked questions

What does U1516 mean on an applicable Chevrolet Equinox?

The supplied verified evidence does not establish a generic textual definition. It identifies U1516 as a DTC addressed in PIT6393 radio diagnostic guidance.

Will a radio update fix U1516?

PIT6393 states that if the listed DTC conditions are met and the vehicle can receive software listed in 25-NA-085 or 25-NA-183, updating the radio should correct the issue.

Does U1516 mean the radio must be replaced?

No. The verified bulletin says to follow SI diagnostics. It notes radio replacement only if SI diagnostics instruct it; qualifying vehicles may instead be corrected by a radio software update.

Is U1516 covered by a recall?

Not yet established by verified evidence.

20. Sources & verification

Verified
Chevrolet U1516: NA-085 or 25-NA-183 please update the radio it should… | EV Diagnostics