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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1570 (BATTERY)REPAIR INSTRUCTIONSBATTERY REPLACEMENT - AUXILIARYINSTALLATION 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 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the battery insulator, if necessary.
  2. Install the auxiliary battery.
    NOTE: Refer to FASTENER NOTICE .
  3. Install battery hold down retainer and bolt.

    Tighten 

    Tighten the bolt to 25 N.m (18 lb ft).

    Fig 1: Install Battery, Insulator, Retainer & Bolt
    G02109450Courtesy of GENERAL MOTORS CORP.
  4. Connect the auxiliary positive battery cable (1).

    Tighten 

    Tighten the bolt to 17 N.m (13 lb ft).

  5. Snap the auxiliary positive battery cable cap closed.
  6. Connect the auxiliary battery negative cable. Refer to Battery Negative Cable Disconnect/Connect Procedure (Single Battery)  or Battery Negative Cable Disconnect/Connect Procedure (Auxiliary Battery) .
    Fig 2: Connect Auxiliary Positive Battery Cable
    G02109451Courtesy 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.