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Chevrolet B101D

– in the U.S., refer to GM Training video 10212.01D (January

DriveNot yet established by verified evidence. The supplied data lists safe-to-drive status as unknown.
ChargeNot yet established by verified evidence. The supplied data lists safe-to-charge status as unknown.
ServiceProfessional GM/Chevrolet service is appropriate because the verified communications are written for trained technicians and may require diagnostic equipment, module programming, or passenger-restraint-system service.
Confidence95%

Quick answer

For Chevrolet B101D, verified evidence identifies several distinct bulletin contexts. One official communication describes B101D-37 stored in history in the Vehicle Communication Interface Module/telematics communication interface control module. Other official communications associate B101D with infotainment blue-screen scenarios, OnStar/telematics diagnosis, or the passenger-presence system. The exact meaning cannot be determined from code B101D alone; the module and sub-code matter.

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.

DTC Chevrolet B101D-3C Short ExplanationMaxidot Chevrolet
DTC Chevrolet B101D-37 Short ExplanationMaxidot Chevrolet
DTC Chevrolet B101D-38 Short ExplanationMaxidot Chevrolet

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

1. What does B101D mean?

For Chevrolet B101D, verified evidence identifies several distinct bulletin contexts. One official communication describes B101D-37 stored in history in the Vehicle Communication Interface Module/telematics communication interface control module. Other official communications associate B101D with infotainment blue-screen scenarios, OnStar/telematics diagnosis, or the passenger-presence system. The exact meaning cannot be determined from code B101D alone; the module and sub-code matter.

2. Technical explanation

The supplied official evidence does not support one universal definition for B101D. GM/NHTSA communications show the code in different systems and diagnostic contexts. PIC5492B/C/E/F concerns B101D-37 in history in the Vehicle Communication Interface Module or telematics communication interface control module. Communication 030846004W says that B101D and/or U18B4 may indicate an Ethernet issue and directs technicians to record the sub-code and assess the original customer concern and OnStar operation. Bulletin 19-NA-076 lists B101D as an additional SI keyword and addresses infotainment blue-screen DTC scenarios and programming information. Bulletin 12-09-41-002D describes B101D in the passenger-presence system, including possible electronic-device interference and an ECU hardware fault. Therefore, accurate diagnosis requires the stored module, sub-code, current-versus-history status, and vehicle symptoms.

3. What system is affected?

Not yet established by verified evidence as a single system. Verified contexts include the Vehicle Communication Interface Module/telematics communication interface control module, infotainment-related blue-screen scenarios, and the passenger-presence system.

4. How serious is this code?

Not yet established by verified evidence. The supplied data lists severity as unknown.

5. Symptoms you may notice

  • A B101D-37 code stored in history in the Vehicle Communication Interface Module or telematics communication interface control module is described in PIC5492 revisions.
  • Infotainment blue-screen DTC scenarios are referenced in bulletin 19-NA-076.
  • A Service Airbag Message on the driver information center is described in bulletin 12-09-41-002D for its passenger-presence-system context.
  • OnStar operation, connection following an OnStar key press, and GPS location following a key press are diagnostic questions specified in communication 030846004W.

6. Possible causes

  • For the passenger-presence-system bulletin context, verified evidence states that electronic devices may interfere with the system and that it is not possible to distinguish that interference from a qualified ECU hardware fault using B101D alone.
  • For the telematics diagnostic context, B101D and/or U18B4 may indicate an Ethernet issue.
  • For other B101D contexts, a specific cause is not yet established by verified evidence.

7. Can I still drive the vehicle?

Not yet established by verified evidence. The supplied data lists safe-to-drive status as unknown.

8. Can I charge the vehicle?

Not yet established by verified evidence. The supplied data lists safe-to-charge status as unknown.

9. What you can safely do

  • Record the complete DTC, including its sub-code, the module reporting it, and whether it is current or history.
  • For an OnStar/telematics concern, note the original customer concern and the observed response to an OnStar key press, including connection and GPS-location behavior if applicable.
  • If a Service Airbag Message is present, arrange professional diagnosis rather than attempting component repair.
  • Do not perform high-voltage, airbag, telematics-module, or programming repairs yourself.

10. Step-by-step troubleshooting

  1. Use professional diagnostic equipment to identify the reporting module and complete B101D sub-code.
  2. For B101D and/or U18B4 in the referenced telematics context, communication 030846004W instructs technicians to record the sub-code and gather the original concern and OnStar-account/key-press details.
  3. For the passenger-presence-system context covered by 12-09-41-002D, follow the applicable GM service information and bulletin procedure.
  4. For blue-screen-related scenarios, have a trained GM technician evaluate applicability of 19-NA-076 and its programming information.

11. When to contact service

Professional GM/Chevrolet service is appropriate because the verified communications are written for trained technicians and may require diagnostic equipment, module programming, or passenger-restraint-system service.

12. What the service center may check

  • Identify the module that stored B101D and the full suffix/sub-code.
  • Determine whether the code is current or history.
  • Document the original customer concern and relevant observed behavior.
  • For OnStar/telematics diagnosis, verify whether there is an active OnStar account with applicable data, whether an OnStar key press connects, and whether current GPS location is available after a key press.
  • Evaluate the applicable GM bulletin based on the vehicle, module, sub-code, and symptom context.

13. Possible repair or resolution

  • For the passenger-presence-system condition described in bulletin 12-09-41-002D, the verified bulletin summary states that the PPS system should be replaced whether B101D is current or history.
  • For blue-screen scenarios, 19-NA-076 contains programming information; exact applicability and procedure are not established by the supplied summary.
  • For B101D-37 history in the telematics interface context, the supplied evidence confirms the bulletin topic but does not provide a verified repair procedure.

14. Affected vehicles

15. Related TSBs / service bulletins

  • PIC5492B — NHTSA Manufacturer Communication 10112388, published October 4, 2013. Addresses B101D-37 history in the Vehicle Communication Interface Module or telematics communication interface control module.
  • PIC5492C — NHTSA Manufacturer Communication 10114748, published November 24, 2014. Addresses B101D-37 history in the Vehicle Communication Interface Module or telematics communication interface control module.
  • PIC5492E — NHTSA Manufacturer Communication 10111715, published December 12, 2016. Addresses B101D-37 history in the Vehicle Communication Interface Module or telematics communication interface control module.
  • PIC5492F — NHTSA Manufacturer Communication 10123227, published October 5, 2017. Addresses B101D-37 history in the Vehicle Communication Interface Module or telematics communication interface control module.
  • 12-09-41-002D — NHTSA Manufacturer Communication 10116590, published February 28, 2017. Covers a passenger-presence-system B101D context and a Service Airbag Message.
  • 030846004W — NHTSA Manufacturer Communication 10172292, published January 13, 2020. Provides GM TAC information-gathering requirements when B101D and/or U18B4 are diagnosed.
  • 19-NA-076 — NHTSA Manufacturer Communications 10199239, 10198848, and 10209756. References B101D in infotainment blue-screen DTC scenarios and programming information.

16. Recall information

  • Not yet established by verified evidence. The supplied sources are manufacturer communications/service bulletins, not recall records.

17. Official manufacturer information

Official NHTSA-hosted manufacturer communications supplied for this code include PIC5492B/C/E/F, 12-09-41-002D, 030846004W, and 19-NA-076. Applicability records supplied for U.S. Chevrolet vehicles include Bolt EUV (2020–2022), Bolt EV (2011–2017 and 2020–2022), Spark (2011–2017), and Volt (2011–2017). These applicability entries do not establish that every vehicle in those ranges has the same B101D condition or bulletin applicability.

19. Frequently asked questions

Does B101D have one fixed meaning on Chevrolet vehicles?

No. Verified evidence places B101D in multiple module and symptom contexts. The reporting module and sub-code are necessary to interpret it.

Does B101D mean an Ethernet problem?

Not by itself. Communication 030846004W states that B101D and/or U18B4 may indicate an Ethernet issue in its diagnostic context.

Can B101D be related to the airbag system?

Yes, in the specific passenger-presence-system context of bulletin 12-09-41-002D, which describes a Service Airbag Message and B101D.

Can I safely drive or charge with B101D?

Not yet established by verified evidence. Safe-to-drive and safe-to-charge statuses are listed as unknown in the supplied diagnostic data.

Is there a recall for B101D?

Not yet established by verified evidence. No recall record was supplied.

20. Sources & verification

Verified
Chevrolet B101D: – in the U.S., refer to GM Training video 10212.01D… | EV Diagnostics