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Home › Hummer › 2003 › H2 › Repair and Diagnosis › External Pages › Different car › Section 587 (Transfer Case - BW 4484) › Repair Instructions › Transfer Case Control Module Reprogramming › Set-up for Module Programming/Reprogramming

Set-up for Module Programming/Reprogramming

WARNING: This page is about a different car, the 2004 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: Ensure that the vehicle battery is fully charged and that a battery charger is no longer connected. If performing this procedure for module replacement, install new module before proceeding.
  • Turn OFF all accessories.
  • Turn ON the ignition, with the engine OFF.
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