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.
2003 Hummer H2 V8-6.0LFACTORY OEM SERVICE PROCEDURE
Manifold Pressure/Vacuum Sensor: Service and Repair
MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR REPLACEMENT
REMOVAL PROCEDURE
1. Remove the engine sight shield.
2. Disconnect the manifold absolute pressure (MAP) sensor electrical connector.
3. Remove the MAP sensor (1) from the intake manifold.
INSTALLATION PROCEDURE
IMPORTANT: Lightly coat the MAP sensor seal with clean engine oil before installing the sensor.
1. Install the MAP sensor (1). Push the MAP sensor down in order to engage the sensor into the retainer.
2. Connect the MAP sensor electrical connector.
3. Install the engine sight shield.
REMOVAL PROCEDURE
1. Remove the engine sight shield.
2. Disconnect the manifold absolute pressure (MAP) sensor electrical connector.
3. Remove the MAP sensor (1) from the intake manifold.
INSTALLATION PROCEDURE
IMPORTANT: Lightly coat the MAP sensor seal with clean engine oil before installing the sensor.
1. Install the MAP sensor (1). Push the MAP sensor down in order to engage the sensor into the retainer.
2. Connect the MAP sensor electrical connector.
3. Install the engine sight shield.
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.