EV Diagnostics
Verified EV diagnostic knowledge page

Chevrolet U1962

Correction: The dealer will need to perform the Serial Data Authentication Con gurati

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact a Chevrolet dealer for diagnosis and the applicable Serial Data Authentication Configuration procedure. Service urgency is not established by verified evidence.
Confidence95%

Quick answer

For the verified Chevrolet applications, U1962 is documented as an indicator that the Serial Data Authentication Configuration did not complete properly. A dealer needs to perform the applicable Serial Data Authentication Configuration procedure.

This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.

Video guides

Watch Videos

Relevant videos play here without leaving this diagnostic page.

No sufficiently relevant embeddable video has been accepted for this diagnostic yet.

Videos are supporting material and never override OEM or regulator evidence.

1. What does U1962 mean?

For the verified Chevrolet applications, U1962 is documented as an indicator that the Serial Data Authentication Configuration did not complete properly. A dealer needs to perform the applicable Serial Data Authentication Configuration procedure.

2. Technical explanation

Official GM manufacturer communications state that U1962 may set when the Serial Data Authentication Configuration procedure fails, or when its setup step fails or is incomplete, including cases where programming appears to run successfully. One communication identifies a current U1962 in one or more modules as a main indicator that the configuration did not complete properly.

3. What system is affected?

Serial Data Authentication Configuration / vehicle module programming and setup process. A specific vehicle system name is not established by the supplied diagnostic record.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • U1962 may be current in one or more modules when Serial Data Authentication Configuration did not complete properly.
  • The Serial Data Authentication Configuration setup step may fail or be incomplete even though programming appears to run successfully.
  • For the PIT6282/PIT6282A communication context, a vehicle may have a no-start condition with a clicking starter when the Start button is pressed; U1962 is one of several possible DTCs listed.

6. Possible causes

  • Serial Data Authentication Configuration procedure failure.
  • An incomplete Serial Data Authentication Configuration setup step.
  • For the PIT6282/PIT6282A communication context, G111 and/or G112 may not be properly torqued.

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 dealer diagnosis and completion of the applicable Serial Data Authentication Configuration procedure.
  • If the vehicle has a no-start condition or a clicking starter when the Start button is pressed, seek dealer diagnosis.
  • Do not attempt high-voltage or module-programming repairs yourself.

10. Step-by-step troubleshooting

  1. A dealer should verify whether U1962 is current in one or more modules.
  2. A dealer should determine whether the Serial Data Authentication Configuration setup step failed or was incomplete.
  3. For the PIT6282/PIT6282A condition, a dealer should inspect G111 and G112 and confirm they are torqued to specification.

11. When to contact service

Contact a Chevrolet dealer for diagnosis and the applicable Serial Data Authentication Configuration procedure. Service urgency is not established by verified evidence.

12. What the service center may check

  • Check whether U1962 is current in one or more modules.
  • Check whether Serial Data Authentication Configuration completed successfully.
  • Where PIT6282/PIT6282A applies, inspect G111 and G112 and confirm torque meets specification.

13. Possible repair or resolution

  • Perform the Serial Data Authentication Configuration procedure when the configuration did not complete properly.
  • Where PIT6282/PIT6282A applies, inspect G111 and G112 and confirm they are torqued to specification.

14. Affected vehicles

15. Related TSBs / service bulletins

  • PIT5832L, NHTSA manufacturer communication 10253075, published March 11, 2024: identifies current U1962 as an indicator that Serial Data Authentication Configuration did not complete properly and directs the dealer to perform the configuration procedure.
  • PIT5832S, NHTSA manufacturer communication 11011872, published December 13, 2024: states U1962 may set when the Serial Data Authentication Configuration procedure fails or the setup step fails or is incomplete.
  • PIT5832U, NHTSA manufacturer communication 11013468, published January 24, 2025: states U1962 may set when the Serial Data Authentication Configuration procedure fails or the setup step fails or is incomplete.
  • PIT5985J, NHTSA manufacturer communication 11013463, published January 24, 2025: states U1962 may set when the Serial Data Authentication Configuration procedure fails or the setup step fails or is incomplete.
  • PIT6282, NHTSA manufacturer communication 11011192, published November 12, 2024: lists U1962 among possible codes for a no-start/clicking-starter condition and identifies improperly torqued G111 and/or G112 as a possible cause.
  • PIT6282A, NHTSA manufacturer communication 11011319, published November 18, 2024: lists U1962 among possible codes for a no-start/clicking-starter condition and identifies improperly torqued G111 and/or G112 as a possible cause.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified applicability: 2024 Chevrolet Blazer, US; and 2025 Chevrolet Equinox, US. Official NHTSA-hosted manufacturer communications: https://static.nhtsa.gov/odi/tsbs/2024/MC-10253075-9999.pdf ; https://static.nhtsa.gov/odi/tsbs/2025/MC-11013468-0001.pdf ; https://static.nhtsa.gov/odi/tsbs/2025/MC-11013463-0001.pdf ; https://static.nhtsa.gov/odi/tsbs/2024/MC-11011319-0001.pdf ; https://static.nhtsa.gov/odi/tsbs/2024/MC-11011192-0001.pdf

19. Frequently asked questions

What does U1962 mean for the verified Chevrolet applications?

It is documented as a main indicator that Serial Data Authentication Configuration did not complete properly.

Can U1962 set even if programming appears successful?

Yes. The verified manufacturer communications state that the setup step can fail even though programming appears to run successfully; U1962 may then set.

Can I drive or charge with U1962?

Not yet established by verified evidence.

What repair is documented?

The documented correction is for a dealer to perform the Serial Data Authentication Configuration procedure. In the PIT6282/PIT6282A context, the documented correction also includes inspecting G111 and G112 and confirming specified torque.

20. Sources & verification

Verified
Chevrolet U1962: Correction: The dealer will need to perform the… | EV Diagnostics