B101D on GMC

Control module internal hardware fault (Chevrolet and GMC; module varies)

Severity not verified — if the car runs badly, have it inspected

The code is stored by different modules on GM vehicles, from the OnStar module to the airbag computer. With the airbag light on, the restraint system may not work as designed, but no source rates the code itself, so the severity is not verified.

It gets more serious if:

  • Inspect soon: The airbag (SRS) light is on or flashing with the code, as in several Malibu reports

Safety-critical system: explanation only, no DIY steps. Source: how we rate severity

This page covers only what differs on GMC. For what B101D means, the ranked causes and the test order, see the B101D guide.

What's different on GMC

GMC

  • 2011–2019 · Acadia

    Supported by vehicle data

    GM bulletins cover Acadia telematics module B101D; a 2019 Acadia dealer found B101D from a water-damaged vision processing module.

  • PIT5236J (gmc)Status unverified

    OnStar telematics module B101D, complete campaign then call GM

    2006–2017acadia, sierra-1500, yukon, yukon-xl · issued · NHTSA 10113318

    Tells technicians that vehicles with B101D stored in the telematics module need campaign 14395 or 15086 completed, then data gathered and GM Technical Assistance contacted.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • PIT5236B (gmc)Status unverified

    OnStar module does not support all B101D symptom codes

    2011–2015acadia, sierra-1500, yukon, yukon-xl · issued · NHTSA 10114801

    Says the OnStar module does not support every B101D symptom code.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • PIC5492E (gmc)Status unverified

    B101D-37 history in the communication interface module

    2000–2017acadia, sierra-1500, yukon, yukon-xl · issued · NHTSA 10111715

    Says engineering found B101D-37 only shows in history on the scan tool and does not cause OnStar problems.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Sources and review

  1. GM PIT5236J: DTC B101D stored in the telematics communication interface control module — General Motors (via NHTSA bulletin summary)
  2. NHTSA complaint ODI 1966616: 2019 GMC Acadia, vision processing module — NHTSA Office of Defects Investigation (consumer complaint)
Last reviewed
Written by
Saurabh K.
Editorial review
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Technician review
Technician review pending

This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error

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