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GMC Yukon 2000–2006

GMC YukonModel years 2000–2006

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2 conditions added

Common on this vehicle:Warning light

C0561 is written only in documents for GM vehicles in general. No record or document that names this vehicle states it, and it may not be a code this model year and engine set. The records are shown as their sources write them.

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1 records state a cause or a remedy. Each record is shown as short labels in the order fault → finding the cause → correction. Press a label to narrow to the records that state it.

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ELECTRICAL SYSTEM1

  1. Manufacturer communication2006 GMC YUKON DENALI ・ 2018-04-23

    Aftermarket ALSL or DLC Devices - Multiple Issues

    1. 1Fault

      • Bus or LAN traffic may stay active, leading to a discharged vehicle battery.
      • C0561 may be stored in the EBCM, leading to a traction control issue.
      • The engine warning lamp may come on with numerous communication DTCs such as U0100, U0101, U186B and U1862.
      • The transmission may not shift for one key cycle, with the TCM in default mode.

    2. 2Finding the cause

      Possible causes

      • Monitoring devices and other electronic accessories such as aftermarket cruise control or police speed checking devices may cause one or more of these concerns.
      • Many of the problems could be caused by an open connection on the HSCAN bus.

      Steps to confirm (in the document’s order)

      • If normal diagnostics find no root cause, check for a tracking or maintenance-scheduling device plugged into the ALDL / Data Link Connector (DLC).

    3. 3Correction

      Repair

      1. If the device is available, try to duplicate the condition, then remove the device to see whether the condition is eliminated.
      2. If the condition remains with the device removed, continue diagnosing the vehicle with the appropriate Service Information.

      Caution

      • Some devices carry a second DLC connector, and the device and harness can be hidden so the technician may not notice that the diagnostic connector is not in the factory location.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to 2006-2014 GM passenger cars and trucks.
    • Applies to：The bulletin is written with a focus on full size trucks, full size vans and other fleet vehicles, but could apply to any vehicle.
    • Condition：Bus or LAN traffic may stay active, leading to a discharged vehicle battery.
    • Condition：C0561 may be stored in the EBCM, leading to a traction control issue.
    • Condition：The engine warning lamp may come on with numerous communication DTCs such as U0100, U0101, U186B and U1862.
    • Condition：The transmission may not shift for one key cycle, with the TCM in default mode.
    • Cause：Monitoring devices and other electronic accessories such as aftermarket cruise control or police speed checking devices may cause one or more of these concerns.
    • Cause：Many of the problems could be caused by an open connection on the HSCAN bus.
    • Confirm：If normal diagnostics find no root cause, check for a tracking or maintenance-scheduling device plugged into the ALDL / Data Link Connector (DLC).
    • Caution：Some devices carry a second DLC connector, and the device and harness can be hidden so the technician may not notice that the diagnostic connector is not in the factory location.
    • Repair：If the device is available, try to duplicate the condition, then remove the device to see whether the condition is eliminated.
    • Repair：If the condition remains with the device removed, continue diagnosing the vehicle with the appropriate Service Information.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This technical bulletin provides a procedure on aftermarket ALSL or DLC devices causing multiple issues due to suspected tampering.