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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 978 (BATTERY, CHARGING SYSTEM & STARTING SYSTEM)REPAIR INSTRUCTIONSBATTERY NEGATIVE CABLE REPLACEMENT (6.6L (LLY) ENGINE)INSTALLATION 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 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the negative battery cable (1).
  2. Position the negative cable and forward lamp wiring harness ring terminals to the frame.
  3. Insert the anti-rotation tab on the forward lamp wiring harness (2) into the hole in the frame.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  4. Install the forward lamp wiring harness ground/negative cable bolt (3).

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

    5. Fig 1: View Of Negative Battery Cable, Forward Lamp Wiring Harness & Ground/Negative Cable Bolt (6.6L (LLY) Engine)
    GM1369540Courtesy of GENERAL MOTORS CORP.
  5. Position the negative cable and engine wiring harness ring terminals to the engine block.
  6. Position the anti-rotation tab on the negative cable (2) in the correct location.
  7. Install the engine wiring harness ground/negative cable bolt (1).

    Tighten:  Tighten the bolt to 34 N.m (25 lb ft).

    8. Fig 2: View Of Negative Battery Cable Bolt (6.6L (LLY) Engine)
    GM1369539Courtesy of GENERAL MOTORS CORP.
  8. Lower the vehicle.
  9. Install the negative cable to the positive cable clip.
  10. Install the negative cable clip (1) to the power steering pump bracket.
    11. Fig 3: View Of Power Steering Pump Bracket Negative Cable Clip (6.6L (LLY) Engine)
    GM1369538Courtesy of GENERAL MOTORS CORP.
  11. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure (Single Battery)  or Battery Negative Cable Disconnect/Connect Procedure (Auxiliary Battery) .
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.