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 VARIANT/TRIMSECTION 1 (ENGINE CONTROL SYSTEM - 4.8L, 5.3L, AND 6.0L - INTRODUCTION (2 OF 2))REPAIR INSTRUCTIONSFUEL INJECTOR 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 variant/trim than selected.

IMPORTANT: When ordering new fuel injectors, you must order the correct injector for the application being serviced.

Fig 1: Locating Fuel Injector ID Number

Courtesy of GENERAL MOTORS CORP.

The fuel injector (1) is stamped with a part number identification (2). A four-digit build date code (3), which indicates the month (4), day (5), year (6), and the shift (7) that built the fuel injector.

Fig 2: View Of Fuel Injector, Clip & O-Rings

Courtesy of GENERAL MOTORS CORP.

Lubricate the NEW fuel injector O-ring seals (2, 4) with clean engine oil.
Install the NEW injector O-ring seals onto the fuel injector.
Install a NEW retainer clip (1) onto the fuel injector.

Fig 3: Exploded View Of Fuel Rails & Injector Components

Courtesy of GENERAL MOTORS CORP.

Install the fuel injector (17) into the fuel rail injector socket with the electrical connector facing outward. The retainer clip (19) locks onto a flange on the fuel rail injector socket.
Install the fuel rail. Refer to Fuel Rail Assembly Replacement .

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.