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Source reference 2005-02-52

Manufacturer communication — 2002 GMC FULLSIZE AND MIDSIZE PICKUPS AND UTILITIES (YUKON)

Reporter type: Manufacturer

Vehicles as recorded

What the manufacturer’s document says

02-04-21-006D ・ fault and correction ・ names no model (for full-size utilities)

Applies to

  • Row for 2002-2004 Fullsize and Midsize Pickups and Utilities: sleepy New Venture Gear transfer case control module.

    the passage
    2002-2004 Fullsize and Midsize Pickups and Utilities – Sleepy New Venture Gear Transfer Case Control Module

Correction

Repair

  1. Verify the sleepy module as the primary cause, then reprogram the TCCM with the latest software.

    the passage
    Verify sleepy module as primary cause. Reprogram TCCM with latest software.

  2. Replace the module only if a C0550 DTC shows as current or in history; the reference is bulletin 02-04-21-006D.

    the passage
    Replace the module only if a C0550 DTC shows as current or in history. 02-04-21-006D

Caution

  • Do not replace the encoder motor or the transfer case.

    the passage
    Don’t replace encoder motor or transfer case.

What is needed

Parts and materials
Not stated
Labor time
Not stated
Special tools
Not stated
Scan tool
  • Reprogram the TCCM with the latest software (after verifying the sleepy module as the primary cause)

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

Compiled by reading the full text of the document; each point stands on the passage shown. Check the document itself, linked below, before working on a vehicle.

Stated content

  1. Communication summary

    トラックの問題 — 一度で正しく直す 2002-2004 Fullsize および Midsize Pickups and Utilities – New Venture Gear トランスファーコントロールモジュールが眠ったままになる（Sleepy） 眠ったままのモジュールが主原因であることを確認する。TCCM を最新のソフトウェアで再プログラミングする。 エンコーダーモーターやトランスファーを交換しない。 モジュールを交換するのは、DTC C0550 が現在または履歴として表示される場合だけにする。 02-04-21-006D Machine translation (unreviewed)

    Truck Issues — Fix It Right the First Time 2002-2004 Fullsize and Midsize Pickups and Utilities – Sleepy New Venture Gear Transfer Case Control Module Verify sleepy module as primary cause. Reprogram TCCM with latest software. Don’t replace encoder motor or transfer case. Replace the module only if a C0550 DTC shows as current or in history. 02-04-21-006D
    Go to this passage in the original

Source

Source
GM TechLink
Source reference
2005-02-52
Received by source
2005-02-01
Incident date
Unknown

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