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Home >> Cadillac >> 2007 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 2003 (Hybrid/EV Control System) >> Repair Instructions >> Accessory DC Power Control Module Removal and Installation >> Installation Procedure
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Installation Procedure

WARNING: This page is about a different car, the 2012 GMC Yukon, 2012 Chevrolet Tahoe, and 2012 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of APM, Coolant Seal & Fasteners
    GM1971296Courtesy of GENERAL MOTORS COMPANY
  1. Install new accessory DC power control module coolant seal (3).
  2. Position the accessory DC power control module (2) onto the power inverter module ensuring the seals remain in place.
    3. CAUTION:

    Refer to Fastener Caution .

  3. Install the accessory DC power control module mounting fasteners (1). Tighten the mounting fasteners to 10 N.m (89 lb in).
    4. Fig 2: Pressure Adapter Kit & Related Components
    GM1971297Courtesy of GENERAL MOTORS COMPANY
  4. Rotate the drive motor generator control module assembly onto the accessory DC power control module.
  5. Clamp GE-48494  adapter kit components (2, 3) to a coolant pipe.
  6. Plug the remaining coolant pipe with GE-48494  adapter kit plug and clamp (1).
  7. Apply 20 psi (138 kPa) pressure with J 24460-01  pressure tester (4).
  8. Monitor the pressure tester gauge for 5 minutes and ensure that pressure remains at the specified value.
    • If the specified pressure cannot be maintained, disassemble the drive motor generator control module assembly and replace the coolant seals.
    • If pressure remains at the specified value, proceed to the next step.
  9. Remove all GE-48494  adapter kit components.
    10. Fig 3: Identifying PIM Cover & Retaining Bolts
    GM1971293Courtesy of GENERAL MOTORS COMPANY
  10. Remove the power inverter module cover retaining bolts (1).
  11. Remove the power inverter module cover (2).
    12. Fig 4: Identifying HV DC APM Terminal Fasteners
    GM1971292Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Always remove and install the High Voltage terminal fasteners with a magnet tipped socket. Never touch the exposed electronic circuit board surface or components. Dropped fasteners or physical contact may result in electronic circuit board damage.

  12. Install the high voltage dc accessory DC power control module terminal fasteners (1) utilizing a magnetic socket. Tighten the terminal fasteners to 9 N.m (80 lb in).
    13. Fig 5: Identifying PIM Cover Seal
    GM1971291Courtesy of GENERAL MOTORS COMPANY
  13. Install a new power inverter module cover seal (3).
    14. NOTE:

    DO NOT use excessively abrasive cleaning tools on the sealing surface. Hand sanding with wet 400 grit sandpaper or use of a hand scraper is recommended.

  14. Clean the sealing surface of the power inverter module cover as necessary.
  15. Position the power inverter module cover (2) onto the power inverter module ensuring the seal remains in place.
  16. Install the power inverter module cover fasteners (1). Tighten the fasteners to 5 N.m (44 lb in).
    17. Fig 6: Identifying Ground Strap & Bolt
    GM2008829Courtesy of GENERAL MOTORS COMPANY
  17. Install the ground strap (2) and bolt (1). Tighten the bolt to 22 N.m (16 lb ft).
  18. Install the drive motor generator control module. Refer to Drive Motor Generator Control Module Assembly Replacement .
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