Engine Camshaft Position Sensor for the 2011-2015 Chevrolet Trailblazer
Understanding the camshaft position sensor in your Trailblazer and how to choose the right aftermarket replacement.
- The 2011-2015 Trailblazer was not sold in North America, affecting parts availability.
- Symptoms of failure include a check engine light, no-start conditions, rough idle, and poor performance.
- Replacement is generally easy, requiring basic tools and about 30 minutes.
- Choosing a premium or quality aftermarket brand like Standard Motor Products, Delphi, or Dorman is recommended for this critical sensor.
A Note on Vehicle Availability
The Chevrolet Trailblazer model from 2011-2015 was not sold in the North American market. This generation was available in markets such as Asia, Australia, and South America. The Trailblazer sold in the U.S. was from 2002-2009, and a new, smaller crossover version was introduced for the 2021 model year. This guide is specific to the 2011-2015 international model, and information regarding parts and costs is based on data from those markets.
Symptoms of a Failing Camshaft Position Sensor
When the camshaft position sensor starts to fail, your Trailblazer will likely exhibit several noticeable symptoms. Because this sensor is essential for engine timing, a bad signal can cause significant drivability issues. Here are the most common signs:
🎬 Watch this video to see 12 common signs of failure.- Check Engine Light: This is often the first warning. The computer will log a fault code, typically in the range of P0340 to P0349, when it detects a problem with the sensor's signal.
- Difficulty Starting: The engine may crank for a long time before starting, or it may not start at all. This happens because the computer doesn't have the correct camshaft position to time the fuel injection and spark.
- Engine Stalling: The engine may stall unexpectedly while driving, which can be a serious safety concern.
- Rough Idle and Misfires: You might feel the engine vibrating or running unevenly when stopped. This is due to incorrect timing causing engine misfires.
- Poor Acceleration: Your Trailblazer may feel sluggish and lack power when you press the gas pedal.
- Reduced Fuel Economy: When ignition and fuel timing are off, the engine burns fuel less efficiently, leading to more frequent trips to the gas station. 🎬 Learn how to test and fix these common sensor symptoms.
Choosing the Right Aftermarket Sensor
When replacing the camshaft position sensor, you have a choice between OEM (Original Equipment Manufacturer) and aftermarket parts. For a vehicle like the 2011-2015 Trailblazer, sourcing OEM parts in North America might be difficult. Aftermarket parts are a viable and often more accessible alternative.
Aftermarket brands can be grouped into tiers:
- Premium Aftermarket (e.g., Standard Motor Products, Delphi, Hitachi): These brands often manufacture parts for the original automaker and have a reputation for quality and reliability that is very close to OEM standards. They undergo rigorous testing and are a good choice for peace of mind.
- Quality Aftermarket (e.g., Dorman, Walker Products): These brands offer a good balance of price and quality. They are a popular choice for many repairs and generally provide reliable performance.
- Economy/Budget Brands: While the lower price is tempting, quality can be inconsistent. For a critical sensor like the camshaft position sensor, it's often better to invest in a mid-tier or premium brand to avoid premature failure and potential engine issues.
Pro Tip: Check the Connector
Before ordering, it's a good idea to visually inspect the existing sensor and its electrical connector. Match the shape and number of pins to the pictures of the new part to ensure you're ordering the correct one.
| Part Type | Estimated Cost |
|---|---|
| New OEM | $70 - $120 |
| New Aftermarket | $25 - $80 |
| Shop Labor | $75 - $150 |
Note: Costs are estimates and can vary based on brand, supplier, and location. Labor costs are based on typical shop rates in the US, though the vehicle is not a US model.
Frequently Asked Questions (FAQ)
Where is the camshaft position sensor located on the 2011-2015 Trailblazer?
On most engines, including the 2.8L Duramax common in this Trailblazer, the camshaft position sensor is typically located on the front of the engine near the timing cover or on the cylinder head. It is a small sensor with an electrical connector and is usually held in place by a single bolt.
Can I replace the camshaft position sensor myself?
Yes, this is a DIY-friendly repair for many people. It usually involves disconnecting the battery, unplugging the electrical connector, removing one bolt, and swapping the old sensor for the new one. The difficulty is generally low, requiring basic hand tools like a socket set.
🎬 Follow this step-by-step guide to install your new sensor.Are there any recalls for the camshaft position sensor on this Trailblazer?
A search of NHTSA data did not show any specific recalls for the camshaft position sensor on the 2011-2015 Chevrolet Trailblazer. However, it's important to remember that NHTSA data primarily covers vehicles sold in the United States.
Do I need to do anything after installing the new sensor?
In most cases for this type of sensor, no special relearn procedure is required. After installing the new sensor and reconnecting the battery, it's a good practice to clear any stored trouble codes from the engine computer with an OBD2 scanner.
Helpful Videos
Technical Specifications
OEM Part Numbers: 12615626 12598208
The camshaft position sensor for this vehicle is a Hall-effect sensor that reads the rotation of the camshaft. It typically has a 3-pin connector and is sealed with an O-ring.
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Chevrolet Trailblazer: