Sierra Classic 3500 4WD V8-8.1L (2007)
Manifold Pressure/Vacuum Sensor: Service and Repair
MANIFOLD ABSOLUTE PRESSURE SENSOR REPLACEMENT
REMOVAL PROCEDURE
1. Remove the engine sight shield.
2. Disconnect the manifold absolute pressure (MAP) sensor electrical connector (1).
3. Remove the MAP sensor bolt.
4. Remove the MAP sensor.
5. Inspect the MAP sensor seal for wear or damage, replace as necessary.
INSTALLATION PROCEDURE
IMPORTANT: Lubricate the port of the MAP sensor with clean engine oil. Avoid dipping the sensor port directly into the lubricant or
using a solid type of lubricant, as they may block the vacuum port signal.
1. Install the MAP sensor.
NOTE: Refer to Fastener Notice.
2. Install the MAP sensor bolt.
Tighten the bolt to 12 N.m (106 lb in).
