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 MANUALSCHEVROLET2008CHEVY EXPRESS G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 536 (ENGINE CONTROL SYSTEM & FUEL SYSTEM - 4.3L - INTRODUCTION)REPAIR INSTRUCTIONSTHROTTLE BODY ASSEMBLY REPLACEMENTINSTALLATION PROCEDURE

2008 Chevrolet Chevy Express G3500, Van Passenger Extended

Installation Procedure

2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Installation Procedure

WARNING: This page is about a different car, the 2009 GMC Savana and 2009 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Throttle Body, Gasket & Bolts

Courtesy of GENERAL MOTORS CORP.

Install a NEW throttle body gasket (3) into the upper intake manifold.
Place the throttle body (2) onto the upper intake manifold.

CAUTION: Refer to Fastener Caution .

Install the throttle body bolts (1) and tighten to 10 N.m (89 lb in).

Fig 2: Identifying Manifold Absolute Pressure Sensor Components

Courtesy of GENERAL MOTORS CORP.

Connect the engine wiring harness electrical connector (3) to the throttle actuator (2).
Install the air cleaner outlet resonator. Refer to Air Cleaner Outlet Resonator Replacement .

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.