Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSCHEVROLET2005CHEVY EXPRESS G3500, VAN PASSENGER, LQ4REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 1 (ENGINE CONTROL SYSTEM - 4.3L - INTRODUCTION)REPAIR INSTRUCTIONSDISTRIBUTOR REPLACEMENTINSTALLATION PROCEDURE 1

2005 Chevrolet Chevy Express G3500, Van Passenger, LQ4

Installation Procedure 1

2005 Chevrolet Chevy Express G3500, Van Passenger, LQ4SECTION Installation Procedure 1

WARNING: This page is about a different variant/trim than selected.

Fig 1: View Of Second Mark On Base Of Distributor

Courtesy of GENERAL MOTORS CORP.

If installing a new distributor assembly, place 2 marks on the new distributor housing in the same location as the marks on the original housing.
Remove the new distributor cap, if necessary.
Align the rotor with the second mark (2).

Fig 2: View Of Distributor

Courtesy of GENERAL MOTORS CORP.

Guide the distributor into the engine.
Align the hole in the distributor hold-down base over the mounting hole in the intake manifold.

Fig 3: Marking Position Of Rotor In Relation To Distributor Housing

Courtesy of GENERAL MOTORS CORP.

As the distributor is being installed, observe the rotor moving in a clockwise direction about 42 degrees.
Once the distributor is completely seated, the rotor segment should be aligned with the mark on the distributor base (1).
- If the rotor segment is not aligned with the mark, the driven gear teeth and the camshaft have meshed one or more teeth out of alignment.
- In order to correct this condition, remove and reinstall the distributor.

Fig 4: View Of Distributor Hold Down Bolt

Courtesy of GENERAL MOTORS CORP.

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.