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 Avalanche 2500FACTORY OEM SERVICE PROCEDURE

Removal Procedure

Fig 1: View Of Ignition Coil, ECT And MAP Sensor Electrical Connectors

Courtesy of GENERAL MOTORS CORP.

Remove the engine sight shield. Refer to Engine Sight Shield Replacement in Engine Mechanical - 8.1L.
Disconnect the manifold absolute pressure (MAP) sensor electrical connector (1).

Fig 2: View Of MAP Sensor & Bolt

Courtesy of GENERAL MOTORS CORP.

Remove the MAP sensor bolt.
Remove the MAP sensor.
Inspect the MAP sensor seal for wear or damage, replace as necessary.

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.