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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1343 (ENGINE CONTROL SYSTEM (INTRODUCTION) -- 1.8L (LNK))REPAIR INSTRUCTIONSFUEL PRESSURE GAGE INSTALLATION AND REMOVALINSTALLATION 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 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
  1. Relieve the fuel pressure. Refer to Fuel Pressure Relief Procedure .
    2. Fig 1: View Of Engine Upper Cover
    GM828878Courtesy of GENERAL MOTORS CORP.
  2. Remove the four fasteners from the engine cover (1).
  3. Remove the engine cover (1) from the engine.
  4. Remove the quick connect coupling cover of the fuel feed hose.
    5. Fig 2: Removing Quick Connect Coupling
    GM236747Courtesy of GENERAL MOTORS CORP.
  5. Using the J 43178  , disconnect the quick connect coupling of the fuel feed hose from the fuel feed pipe of the fuel rail. See Special Tools and Equipment . Use a shop towel in order to catch any remaining fuel that may leak. Refer to Quick Connect Fitting(s) Service (Metal Collar) .
  6. Install the J 42982  between the fuel feed pipe of the fuel rail and of the fuel feed hose. See Special Tools and Equipment .
    7. Fig 3: Fuel Pressure Gage
    GM320792Courtesy of GENERAL MOTORS CORP.
  7. Install the J 34730-1A  to the. See Special Tools and Equipment .J 42982  , and tighten securely. See Special Tools and Equipment .
    8. NOTE: Refer to Fastener Notice in Cautions and Notices.
  8. Connect the negative battery cable.

    Tighten:  Tighten the retainer for the negative battery cable terminal to 15 N.m (11 lb ft).

  9. Turn ON the ignition in order to pressurize the fuel system.
  10. Turn OFF the ignition.
  11. Check for any fuel leaks.
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.