Where is the location of map sensor on a 1995 Chevy G30 diesel van?

The 1995 Chevy G30 diesel van, likely using a 6.5L engine, doesn't have a component traditionally called a "map sensor" in the same way gasoline engines do. Gasoline engines use a Manifold Absolute Pressure sensor (MAP) to measure intake manifold pressure. The 6.5L diesel uses a different system for fuel management.

Instead of a MAP sensor, the 6.5L diesel uses a Barometric Pressure Sensor (BPS) and relies heavily on other sensors like the Oxygen Sensor and the Intake Air Temperature (IAT) sensor to determine fuel delivery. The precise location of the BPS varies slightly depending on the year and specific configuration, but it's usually mounted on the firewall or near the air intake system.

To locate the sensor:

1. Consult a repair manual specific to your 1995 Chevy G30 6.5L diesel van. This is the most reliable way to find the exact location and identify the sensor.

2. Look near the air intake system: This is the most probable area for the barometric pressure sensor.

3. Examine the firewall: The BPS might be mounted on the firewall, tucked away.

4. Inspect the wiring harness: Trace the wiring from the ECM (Engine Control Module) which is usually located under the hood near the driver's side. Following the wires related to barometric pressure or air intake may lead you to the sensor.

Remember to be careful when working near the engine. Disconnect the negative battery terminal before starting any electrical work.