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Chevrolet B19DA

Correction Please update the K73 Telematics Control Module software using V

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact a Chevrolet dealer or qualified GM service facility. The verified bulletin directs a K73 Telematics Control Module software update.
Confidence95%

Quick answer

For certain 2025–2026 Chevrolet Equinox vehicles in the US, DTC B19DA is documented in GM bulletin PIT6411/PIT6411A as associated with a K73 Telematics Control Module software concern. The bulletin correction is to update K73 software using the manufacturer 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 B19DA mean?

For certain 2025–2026 Chevrolet Equinox vehicles in the US, DTC B19DA is documented in GM bulletin PIT6411/PIT6411A as associated with a K73 Telematics Control Module software concern. The bulletin correction is to update K73 software using the manufacturer procedure.

2. Technical explanation

Verified bulletin evidence identifies B19DA in connection with a K73 Telematics Control Module software concern. The supplied diagnostic title and meaning reflect the bulletin correction: update the K73 Telematics Control Module software using the applicable GM service procedure. The evidence does not establish a component failure or a high-voltage battery/drive-system fault.

3. What system is affected?

K73 Telematics Control Module.

4. How serious is this code?

Unknown. The supplied verified evidence does not assign a severity level.

5. Symptoms you may notice

  • Loss of internet connection and data.
  • A “Service Emergency Calling” message.
  • The bulletin also references connectivity-related concerns; exact vehicle-specific symptoms require diagnosis.

6. Possible causes

  • K73 Telematics Control Module software concern.

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 service with a Chevrolet/GM service facility if B19DA, connectivity loss, or a “Service Emergency Calling” message is present.
  • Do not attempt telematics-module programming or high-voltage repairs yourself.
  • Provide the service facility with DTC B19DA and bulletin PIT6411 or PIT6411A.

10. Step-by-step troubleshooting

  1. Have a qualified GM technician confirm stored diagnostic trouble codes and applicable bulletin coverage.
  2. Have the technician follow the manufacturer procedure for updating K73 Telematics Control Module software.

11. When to contact service

Contact a Chevrolet dealer or qualified GM service facility. The verified bulletin directs a K73 Telematics Control Module software update.

12. What the service center may check

  • Confirm whether the vehicle is a US-market 2025 or 2026 Chevrolet Equinox.
  • Confirm DTC B19DA and any accompanying DTCs documented by the bulletin, including U1624 or U3000 with symptom 46 or 49.
  • Verify K73 Telematics Control Module software status and apply the applicable manufacturer update procedure.

13. Possible repair or resolution

  • Update the K73 Telematics Control Module software using the applicable GM service procedure.

14. Affected vehicles

15. Related TSBs / service bulletins

  • PIT6411, NHTSA Manufacturer Communication PDF 11020681, published July 2, 2025: documents B19DA in association with a K73 Telematics Control Module software concern and directs a K73 software update.
  • PIT6411A, NHTSA Manufacturer Communication PDF 11022782, published August 30, 2025: correction/update document with the same verified K73 Telematics Control Module software direction.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Official NHTSA-hosted manufacturer communications: PIT6411A: https://static.nhtsa.gov/odi/tsbs/2025/MC-11022782-0001.pdf ; PIT6411: https://static.nhtsa.gov/odi/tsbs/2025/MC-11020681-0001.pdf

19. Frequently asked questions

What does Chevrolet DTC B19DA indicate on an Equinox?

For the covered 2025–2026 US Chevrolet Equinox application, verified GM bulletin evidence associates B19DA with a K73 Telematics Control Module software concern.

What repair does the bulletin specify?

The verified bulletin correction is to update the K73 Telematics Control Module software using the applicable GM service procedure.

Can B19DA cause connectivity or emergency-calling messages?

The bulletin references loss of internet connection and data and a “Service Emergency Calling” message in the documented condition.

Is B19DA a recall?

Not yet established by verified evidence.

20. Sources & verification

Verified
Chevrolet B19DA: Correction Please update the K73 Telematics Control… | EV Diagnostics