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Home >> Cadillac >> 2012 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1220 (Hybrid Engine 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 2008 GMC Yukon and 2008 Chevrolet Tahoe. 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 CORP.
  1. Install new APM coolant seal (3).
  2. Position the APM (2) onto the PIM ensuring the seals remain in place.
    3. NOTE: Refer to Fastener Notice .
  3. Install the APM mounting fasteners (1).

    Tighten:  Tighten the mounting fasteners to 10 N.m (89 lb in).

    4. Fig 2: Identifying GE-48494 Adapter Kit & Related Components
    GM1971297Courtesy of GENERAL MOTORS CORP.
  4. Rotate the drive motor generator control module assembly onto the APM.
  5. Clamp the GE-48494  components (2, 3) to a coolant pipe. See Special Tools .
  6. Plug the remaining coolant pipe with the GE-48494  plug and clamp (1). See Special Tools .
  7. Apply the specified pressure with J 24460-01  (4).

    Pressure:  Apply 20 psi (138 kPa) pressure.

  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  components. See Special Tools .
    10. Fig 3: Identifying PIM Cover & Retaining Bolts
    GM1971293Courtesy of GENERAL MOTORS CORP.
  10. Remove the PIM cover retaining bolts (1).
  11. Remove the PIM electronics cover (2).
    12. Fig 4: Identifying HV DC APM Terminal Fasteners
    GM1971292Courtesy of GENERAL MOTORS CORP.
    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 HV dc APM terminal fasteners (1) utilizing a magnetic socket.

    Tighten:  Tighten the terminal fasteners to 9 N.m (80 lb in).

    13. Fig 5: Identifying PIM Cover Seal
    GM1971291Courtesy of GENERAL MOTORS CORP.
  13. Install a new PIM cover seal (3).
  14. Position the PIM cover (2) onto the PIM ensuring the seal remains in place.
  15. Install the PIM cover fasteners (1).

    Tighten:  Tighten the fasteners to 5 N.m (44 lb in).

    16. Fig 6: Identifying DC Power Control Module Ground Strap And Bolt
    GM2008829Courtesy of GENERAL MOTORS CORP.
  16. Install the ground strap (2) and bolt (1).

    Tighten:  Tighten the bolt to 22 N.m (16 lb ft).

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