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.
2008 Hummer H2 V8-6.2LFACTORY OEM SERVICE PROCEDURE
Manifold Pressure/Vacuum Sensor: Service and Repair
Manifold Absolute Pressure Sensor Replacement
Removal Procedure
1. Remove the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement (6.0L (LQ4)) (Upper Intake Manifold Sight Shield Replacement) .
2. Remove the engine sight shield bracket bolts. Position the bracket to the side
3. Disconnect the manifold absolute pressure (MAP) sensor electrical connector.
4. 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. Position the engine harness and sight shield bracket to the intake manifold.
Notice: Refer to Fastener Notice (Fastener Notice) .
4. Install the engine sight shield bracket bolts.
Tighten the bracket bolts to 10 N.m (89 lb in).
5. Install the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement (6.0L (LQ4)) (Upper Intake Manifold Sight Shield Replacement) .
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.