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.
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HOMESERVICE MANUALSCHEVROLET2001EXPRESS 1 TON VAN V8-5.7L VIN RREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSMANIFOLD PRESSURE/VACUUM SENSORSERVICE AND REPAIR
2001 Chevrolet Express 1 Ton Van V8-5.7L VIN R
Manifold Pressure/Vacuum Sensor: Service and Repair
2001 Chevrolet Express 1 Ton Van V8-5.7L VIN RSECTION Service and Repair
MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR REPLACEMENT
REMOVAL PROCEDURE
Other than checking for a worn grommet and loose electrical connectors, the only service possible is a unit replacement if the diagnosis shows a malfunctioning MAP sensor.
1. Turn OFF the ignition.
2. Remove the engine cover.
3. Disconnect the MAP sensor harness connector.
NOTE: Do not rotate or pry on the MAP sensor when removing. Damage to the MAP sensor or the intake manifold may result.
IMPORTANT: If the original MAP sensor is to be reused after removing the MAP sensor from the intake manifold, replace the MAP sensor to intake manifold grommet.
4. Remove the MAP sensor by pulling straight up with a slight rocking motion.
5. Remove and discard the MAP sensor grommet.
INSTALLATION PROCEDURE
1. Install the new MAP sensor grommet on the MAP sensor.
2. Install the MAP sensor.
3. Connect the MAP sensor harness connector.
4. Reinstall the engine cover. Refer to Engine Cover Replacement in Interior Trim.
REMOVAL PROCEDURE
Other than checking for a worn grommet and loose electrical connectors, the only service possible is a unit replacement if the diagnosis shows a malfunctioning MAP sensor.
1. Turn OFF the ignition.
2. Remove the engine cover.
3. Disconnect the MAP sensor harness connector.
NOTE: Do not rotate or pry on the MAP sensor when removing. Damage to the MAP sensor or the intake manifold may result.
IMPORTANT: If the original MAP sensor is to be reused after removing the MAP sensor from the intake manifold, replace the MAP sensor to intake manifold grommet.
4. Remove the MAP sensor by pulling straight up with a slight rocking motion.
5. Remove and discard the MAP sensor grommet.
INSTALLATION PROCEDURE
1. Install the new MAP sensor grommet on the MAP sensor.
2. Install the MAP sensor.
3. Connect the MAP sensor harness connector.
4. Reinstall the engine cover. Refer to Engine Cover Replacement in Interior Trim.
RENDER: 1.0x
NO RELATED
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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.