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HOMESERVICE MANUALSCHEVROLET2009TAHOE BASE, 4.8 CREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 3 (HYBRID ENGINE CONTROLS - INTRODUCTION)REPAIR INSTRUCTIONSACCESSORY DC POWER CONTROL MODULE REMOVAL AND INSTALLATIONINSTALLATION PROCEDURE
2009 Chevrolet Tahoe Base, 4.8 C

Installation Procedure

2009 Chevrolet Tahoe Base, 4.8 CSECTION Installation Procedure
WARNING: This page is about a different variant/trim than selected.
    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. CAUTION: Refer to Fastener Caution .
  3. Install the APM mounting fasteners (1). 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 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 CORP.
  10. Remove the PIM cover retaining bolts (1).
  11. Remove the PIM cover (2).
    12. Fig 4: Identifying HV DC APM Terminal Fasteners
    GM1971292Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.