SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 975 (ENGINE CONTROLS - 4.3L (INTRODUCTION))REPAIR INSTRUCTIONSDISTRIBUTOR REPLACEMENTREMOVAL PROCEDURE
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Removal Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Removal Procedure
WARNING: This page is about a different car, the 2004 GMC Sierra and 2004 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: There are two procedures available to install the distributor.

Use Installation Procedure 1 when the crankshaft has NOT been rotated from the original position.

Use Installation Procedure 2 when any of the following components are removed:

  • The intake manifold
  • The cylinder head
  • The camshaft
  • The timing chain or sprockets
  • The complete engine

If the malfunction indicator lamp (MIL) turns on and DTC P1345 sets after installing the distributor, this indicates an incorrectly installed distributor.

Engine damage or distributor damage may occur. Use Procedure 2 in order to install the distributor.

  1. Remove the air cleaner outlet resonator. Refer to Air Cleaner Outlet Resonator Replacement .
  2. Disconnect the following electrical connectors:
    • Camshaft position (CMP) sensor (2)
    • Fuel pump/oil pressure sensor (3)
    3. Fig 1: View Of Ground Strap And CMP & Fuel Pump/Oil Pressure Sensor Connectors
    GM782680Courtesy of GENERAL MOTORS CORP.
  3. Remove the ignition coil wire from the ignition coil and distributor cap.
    4. Fig 2: View Of Ignition Coil Wire Harness
    GM387772Courtesy of GENERAL MOTORS CORP.
  4. Remove the spark plug wires from the distributor cap.
    • Twist each spark plug boot 1/2 turn.
    • Pull only on the wire boot in order to remove the wire from the distributor cap.
  5. Remove and discard the distributor cap screws.
  6. Remove the distributor cap.
    7. Fig 3: View Of Distributor Cap
    GM301393Courtesy of GENERAL MOTORS CORP.
  7. Using a grease pencil, mark the position of the rotor in relation to the distributor housing (1).
    8. Fig 4: Marking Position Of Rotor In Relation To Distributor Housing
    GM4373Courtesy of GENERAL MOTORS CORP.
  8. Also, mark the distributor housing and the intake manifold.
  9. Remove the distributor hold down bolt.
  10. Remove the distributor.
    11. Fig 5: View Of Distributor
    GM34397Courtesy of GENERAL MOTORS CORP.
  11. As the distributor is being removed, watch the rotor move in a counterclockwise direction about 42 degrees.
  12. Note the position of the rotor segment.
  13. Place a second mark on the base of the distributor (2).

    This will aid in achieving proper rotor alignment during distributor installation.

    14. Fig 6: View Of Second Mark On Base Of Distributor
    GM4376Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.