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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1908 (HYBRID CONTROLS - 3.6L (HP5) - INTRODUCTION)REPAIR INSTRUCTIONSACCESSORY DC POWER CONTROL MODULE REMOVAL AND INSTALLATIONINSTALLATION PROCEDURE
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Installation Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Installation Procedure
WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Drive Motor Generator Control Module Assembly & Coolant Seal
    GM2175738Courtesy of GENERAL MOTORS CORP.
  1. Install new APM coolant seal (3).
  2. Position the APM (2) onto the PIM ensuring the seal remains in place.
    3. CAUTION: Refer to Fastener Caution .
  3. Install the accessory DC power control module (APM) bolts (1). Tighten the bolts to 10 N.m (89 lb in).
    4. Fig 2: Leak Testing Drive Motor Generator Control Module Assembly
    GM2175736Courtesy of GENERAL MOTORS CORP.
  4. Rotate the drive motor generator control module assembly onto the APM.
  5. Clamp the GE-48494:  adapter kit components (2, 3) to a coolant pipe.
  6. Plug the remaining coolant pipe with the 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: PIM Cover
    GM2175734Courtesy of GENERAL MOTORS CORP.
  10. Remove the PIM cover bolts (1).
  11. Remove the PIM cover (2).
    12. Fig 4: Accessory DC Power Control Module (APM) Terminal Fasteners & Cooling Surge Tank Stud
    GM2175732Courtesy 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.