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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1398 (BATTERY, CHARGING SYSTEM AND STARTING SYSTEM)REPAIR INSTRUCTIONSGENERATOR REPLACEMENT (4.2L ENGINE)INSTALLATION PROCEDURE
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Installation Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Installation Procedure
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  1. Install the generator and secure the generator with 3 bolts.

    Tighten:  Tighten the generator bolts to 50 N.m (37 lb ft).

    2. Fig 1: Rear Of Generator (Alternator) View
    GM754357Courtesy of GENERAL MOTORS CORP.
  2. Connect the battery positive cable to the generator and secure the positive cable with the nut (1).

    Tighten:  Tighten the generator positive cable nut to 9 N.m (80 lb in).

    3. Fig 2: View Of Engine Lift Bracket
    GM750247Courtesy of GENERAL MOTORS CORP.
  3. Install the engine lift hook and secure the lift hook with 2 bolts.

    Tighten:  Tighten the bolts to 50 N.m (37 lb ft).

    4. Fig 3: View Of Engine Lift Hook & A/C Bracket Bolt
    GM754344Courtesy of GENERAL MOTORS CORP.
  4. Install the A/C line bracket to the lift hook and secure the bracket with the bolt.

    Tighten:  Tighten the A/C line bracket bolt to 10 N.m (89 lb in).

  5. Install the drive belt. Refer to Drive Belt Replacement in Engine Mechanical - 4.2L.
  6. Connect the battery negative cable. Refer to Battery Negative Cable Disconnect/Connect Procedure .
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.