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.

2004 Chevrolet Astro Van Cargo, AWDFACTORY OEM SERVICE PROCEDURE

Assembly Procedure

IMPORTANT: Installing the driven gear 180 degrees out of alignment, or locating the rotor in the wrong holes, will cause a no-start condition. Premature engine wear or damage may result.

Line up the square-cut hole in the vane wheel for the camshaft position (CMP) sensor.

Fig 1: Identifying Square-Cut Hole In Vane/Reluctor Wheel
Courtesy of GENERAL MOTORS CORP.
Insert the sensor into the housing.

Fig 2: View Of CMP Sensor
Courtesy of GENERAL MOTORS CORP.

Factory Service Tools

Use the Manual With the Right Hardware

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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.