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GMC Yukon 2000–2006

GMC YukonModel years 2000–2006

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1 conditions added

Common on this vehicle:

issueBench seat (RPO AE7) center console armrest hinges broken (replace the lid, not the console assembly)Remove

Possible causes

Security light0 records
Electrical, wiring and power
0Passlock theft deterrent: starts then stalls / no-start with security lamp

The documents say what to doOnly records name itThe size of a node, the width of a link and the numbers are records matching this search, not likelihoods.

FaultCrate・GMC Yukon 2000–2006・Security light

Candidate cause (the documents say what to do)

Passlock theft deterrent: starts then stalls / no-start with security lamp

A magnet in the ignition cylinder produces a unique voltage across a Hall effect sensor in the ignition housing; the BCM and lock cylinder enable starting.

If the voltage matches the stored value, the BCM signals the PCM to enable fuel.

How to tell

B2960P1631Security light

What to do

  1. A security lamp flashing after an attempted start means the fuel disable command is active.
  2. A scan tool parameter showing 'fuel system disabled' or similar indicates a Passlock issue.
  3. Monitor the Passlock Data Voltage for approximately one minute; the voltage value should not change by more than .02 volt.
  4. If the voltage does not change from 5 volts, check the ignition housing.
  5. The condition is the Security lamp illuminated on the instrument panel, engine stalls or no start, with DTC B2960 (Security System Sensor Data Incorrect but Valid) set; the correction is to inspect and repair the cause of DTC B2960.

Caution: Loss of Ignition 1 voltage to the BCM gives the same start-then-stall behaviour.

What is needed

Parts and materials
Not stated
Labor time
Not stated
Special tools
Not stated
Scan tool
Not stated

Only what the technical documents state. "Not stated" does not mean not needed.

In the records

No record states work done for this cause.

Outside the documents and the records

None of the four pages read is a record of the Yukon or Yukon XL. Two are a shop's records of the Hummer H3 (model year not given; not a vehicle of the Yukon's family), and two are Q&A threads on the Silverado (2001 and 2004). The 2001 Silverado thread holds only questions and advice, with no repair outcome reported.

  • Sky Auto writes, in two Hummer H3 records (2017 and 2024), that a vehicle whose engine sometimes would not start showed a Passlock (security) fault on the diagnostic computer and that the Passlock module was replaced. スカイオート（埼玉）スカイオート（埼玉）
  • In its two Hummer H3 records (2017 and 2024) Sky Auto explains that the Passlock module is in effect the ignition switch, and writes that the replacement starts by taking off the steering wheel and works inward from there. スカイオート（埼玉）スカイオート（埼玉）
  • In its two Hummer H3 records (2017 and 2024) Sky Auto writes that the engine would not start on the module swap alone and that the job was finished with programming after the swap (described as registering the Passlock in the 2017 record). The 2024 record adds that the engine was then confirmed to start. スカイオート（埼玉）スカイオート（埼玉）
  • The owner of the 2004 Silverado (4.3L) on 2CarPros writes that the engine started and died after about two seconds with the security lamp looking normal and no codes stored, that the cause was the Passlock sensor, and that it started after a 30-minute relearn (whether the sensor was replaced is not said). 2CarPros

The sentences above were written by FaultCrate from what shops' public pages and Q&A sites state as fact (none of the pages' wording is shown; a second reader checked each against its pages). A record of another vehicle says which vehicle. A Q&A thread is a question and advice, and may not say how the repair ended. The links below are places to look; the contents of pages not read were not checked.

The pages read, and other places to look (12)

Shops' repair records

Repair videos

Forums and Q&A

Owners' records

See the evidence (1 technical documents, 0 records)

Passages of the technical documents

  • A magnet in the ignition cylinder produces a unique voltage across a Hall effect sensor in the ignition housing; the BCM and lock cylinder enable starting.

    The GM VTD or Passlock system uses the body control module (BCM) and ignition lock cylinder to activate the start function. The ignition cylinder uses a magnet that produces a unique voltage value when rotated in the ignition housing across the Hall effect sensor.

    MOTOR Magazine 2006-04-01

  • If the voltage matches the stored value, the BCM signals the PCM to enable fuel.

    The BCM compares this voltage value to the value stored in the BCM. If the voltage values are the same, the BCM sends a signal to the powertrain control module to enable fuel.

    MOTOR Magazine 2006-04-01

  • If the values do not match, the engine briefly starts and then stalls.

    If the voltage values are not the same, the engine will briefly start, then stall.

    MOTOR Magazine 2006-04-01

  • A security lamp flashing after an attempted start means the fuel disable command is active.

    The quickest way is to look at the security indicator lamp on the instrument panel. If it’s flashing after an attempted start, the fuel disable command has been energized.

    MOTOR Magazine 2006-04-01

Read every statement and its source →

Records

None among the records that can be opened now.

See all 0 records of this cause →

A cause or a result a complaint states is the owner’s view or what a dealer told them, not an established fact.

Put together by FaultCrate from public records and technical documents. The cause and the repair are for the workshop to decide with the vehicle in front of it. Counts are records, not failure rates.