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 143 (ENGINE CONTROLS AND FUEL - 3.5L - INTRODUCTION (2 OF 2))REPAIR INSTRUCTIONSMANIFOLD ABSOLUTE PRESSURE SENSOR 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 2008 Chevrolet Malibu Classic. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Throttle Body Components

GM1775003

Courtesy of GENERAL MOTORS CORP.

Lubricate the NEW MAP sensor seal with clean engine oil.
Install the MAP sensor (6) into the upper intake manifold.
Place the MAP sensor bracket (5) into position.

NOTE: Refer to Fastener Notice .

Install the upper intake manifold bolt.
Tighten: Tighten the bolt to 25 N.m (18 lb ft).

Fig 2: View Of Left Side Spark Plug Wires

GM1774994

Courtesy of GENERAL MOTORS CORP.

Install the spark plug wire clip to the MAP sensor bracket, if necessary.

Fig 3: Identifying Engine Wiring Harness Electrical Connectors

GM1774993

Courtesy of GENERAL MOTORS CORP.

Connect the engine wiring harness electrical connector (1) to the MAP sensor.
Install the intake manifold cover. Refer to Intake Manifold Cover 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.