The camshaft position sensor on a 2011 GMC Terrain is mounted on the front of the engine near the timing chain cover.
Across the 2011 Terrain lineup you could have either a 2.4L Ecotec four-cylinder or a 3.0L LLT V6. The sensor’s exact mounting spot varies by engine. On the 3.0L V6, the CMP sensor sits on the timing cover at the front of the engine. On the 2.4L Ecotec, it resides on the cylinder head near the timing area. Both configurations route a harness connector to the engine electrical loom, and both sensors monitor camshaft position to help the PCM control ignition and fuel timing.
Engine variants and sensor location
To understand where to look, identify which engine your Terrain has. The CMP sensor’s placement changes accordingly.
3.0L LLT V6 (gasoline)
In the 3.0L V6, the camshaft position sensor is mounted on the timing cover at the front of the engine. It is typically secured with a small bolt and has a multi-pin electrical connector that plugs into a short wiring harness coming from the engine loom. Access is from the top-front of the engine bay, and you may need to remove the intake plenum or a cover to view it clearly.
2.4L Ecotec I4
For the 2.4L Ecotec engine, the CMP sensor is mounted on or very near the cylinder head in the timing-area region. It is usually located toward the front side of the engine, facing the timing components, with a plug harness that connects to the engine wiring harness. Depending on your exact trim and engine bay layout, a small air intake duct or engine cover may need to be removed to access it.
How to locate the CMP sensor in the 2011 Terrain
The following steps help you pinpoint the camshaft position sensor quickly, regardless of engine type. The exact spot will depend on which engine you have, so use these steps as a general guide.
- With the hood open, visually inspect the front portion of the engine where the timing chain or timing belt cover is visible.
- Follow the wiring harness from the engine’s main electrical connector toward the front of the engine; you’re looking for a small sensor with a multi-pin connector screwed into the engine block or timing cover.
- Look for a sensor mounted flush with the metal surface, usually held by one mounting bolt, and oriented so the sensor face points at a gear or reluctor on the camshaft.
- If you don’t see it right away, remove an upper air intake duct or the engine cover to improve visibility.
Once located, you can inspect the connector for corrosion or loose pins and check the sensor’s wiring for damage. If diagnosing a fault code related to the CMP, verify the sensor voltage and ground with a multimeter and consider a replacement if the readings are out of spec.
What to check if you suspect CMP failure
Below are common indicators of a faulty camshaft position sensor and related checks you can perform.
- Engine misfires, stalling, or no-start conditions, especially when the engine is warm or at idle.
- P0340 or P0341–P0344 diagnostic trouble codes (DTCs) related to camshaft position sensor signals or intermittently missing signal.
- Check engine light illuminated with intermittent sensor readings.
- Visual inspection of the CMP sensor and its connector for oil leaks, corrosion, or damaged wiring.
Replacement should be done with the correct part for your engine and with the harness connector seated firmly. After replacement, clear codes and perform a drive cycle to confirm proper sensor operation.
Summary
The camshaft position sensor on a 2011 GMC Terrain sits on the front of the engine near the timing components. The exact mounting location varies by engine: the 3.0L V6 places the sensor on the timing cover at the front, while the 2.4L Ecotec positions it on the cylinder head near the timing area. To locate it, inspect the front of the engine and follow the sensor’s wiring from the main harness, removing obstructions as needed. If you’re diagnosing a CMP-related issue, check for proper voltage, ground continuity, and inspect the connector for damage before replacing the sensor.