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 MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO, 6.6 2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1257 (ENGINE CONTROLS AND FUEL - 4.3L - INTRODUCTION (2 OF 2))REPAIR INSTRUCTIONSSPARK PLUG REPLACEMENTINSTALLATION PROCEDURE

2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2

Installation Procedure

2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Installation Procedure

WARNING: This page is about a different car, the 2008 GMC Sierra and 2008 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Spark Plugs

Courtesy of GENERAL MOTORS CORP.

Ensure that the spark plug washer is positioned correctly.
Inspect the spark plug gap. Adjust the gap as needed. Refer to Engine Mechanical Specifications .
Install the spark plug into the cylinder head by hand. (left side shown, right similar).

NOTE: Refer to Fastener Notice .

Tighten the spark plug.
Tighten: Tighten the plug to 15 N.m (11 lb ft).

Fig 2: View Of Spark Plug Wire Separators & Boots

Courtesy of GENERAL MOTORS CORP.

If reinstalling the old spark plug wires, apply dielectric grease GM PN 12345579 (Canadian PN 10953481), or equivalent to the inside the spark plug wire boots.
Install the appropriate spark plug wire boot(s) (2) to the spark plug. (left side shown, right similar).

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.