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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1626 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSWATER PUMP REPLACEMENT (3.1L)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 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the gasket.
  2. Install the water pump.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  3. Install the water pump bolts.

    Tighten 

    Tighten the bolts to 10 N.m (89 lb in).

    Fig 1: Assembling Water Pump Components
    G01969628Courtesy of GENERAL MOTORS CORP.
  4. Install the water pump pulley.
  5. Install the water pump pulley bolts.

    Tighten 

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

    Fig 2: Installing Water Pump Pulley & Bolts
    G01969629Courtesy of GENERAL MOTORS CORP.
  6. Install the drive belt. Refer to DRIVE BELT REPLACEMENT in Engine Mechanical - 3.1L.
  7. Install the drive belt shield and the bolt.

    Tighten 

    Tighten the bolt to 10 N.m (89 lb in).

  8. Fill the cooling system. Refer to DRAINING AND FILLING COOLING SYSTEM  .
RENDER: 1.0x

NO RELATED

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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.