Pontiac GTO Camshaft Position Sensor: A Vehicle-Specific Guide (2004-2006)
Everything a GTO owner needs to know about diagnosing and replacing a faulty camshaft position sensor for the LS1 and LS2 engines.
- The replacement job on a 2004 GTO (LS1) is difficult and requires removing the intake manifold.
- The job is much easier on a 2005-2006 GTO (LS2), with the sensor located on the front timing cover.
- Symptoms like hard starting and rough idle are common indicators of a failing sensor.
- Premium aftermarket brands like Delphi and NGK offer OEM-level quality and are recommended, especially for the difficult 2004 replacement.
A Tale of Two GTOs: 2004 vs. 2005-2006
When dealing with the camshaft position sensor on a 2004-2006 Pontiac GTO, the most important thing to know is the model year of your car. The job is drastically different between a 2004 and a 2005-2006 model because of the engine change from the LS1 to the LS2.
Critical Replacement Difference
2004 Pontiac GTO (5.7L LS1 V8): The camshaft position sensor is located at the very back of the engine block, underneath the intake manifold. Replacing it is a labor-intensive job that requires removing the entire intake manifold to gain access. 🎬 Watch this walkthrough for replacing the rear-mounted LS1 sensor. This is a difficult and time-consuming repair.
2005-2006 Pontiac GTO (6.0L LS2 V8): The sensor was moved to the front of the engine on the timing cover, just below the water pump. This location is much easier to access. Replacement typically only requires removing the serpentine belt and an idler pulley to get to the sensor's single mounting bolt.
🎬 See how easy it is to swap the LS2 sensor.Choosing the Right Aftermarket Sensor
For a critical sensor like this, brand choice matters. While an OEM AC Delco part is always a safe choice, several high-quality aftermarket brands offer reliable performance, often at a better price. Here’s how they generally stack up for your GTO:
- Premium Brands (OEM Equivalents): Delphi and NGK (NTK) are excellent choices. Delphi was a major original equipment supplier for GM, and their parts are often identical to the AC Delco-branded part. NGK/NTK is another top-tier manufacturer known for sensor quality and reliability.
- Quality Mid-Tier Brands: Standard Ignition (SMP) and Dorman offer a good balance of quality and value. Dorman is known for re-engineering parts to fix common failure points. Standard Ignition is a long-standing, reputable brand in engine management parts.
- Economy Brands: Brands like URO Parts, Spectra, and others offer the lowest price point. While they can get your car running, their long-term durability and sensor accuracy can be inconsistent. For a part that is so difficult to replace on the 2004 GTO, investing in a premium or quality mid-tier brand is strongly recommended to avoid doing the job twice.
Cost to Replace Pontiac GTO Camshaft Position Sensor
| Part/Service | 2004 GTO (LS1) Cost | 2005-2006 GTO (LS2) Cost |
|---|---|---|
| New Aftermarket Part | $27.24 - $74.90 | |
| Shop Labor | $300 - $450 | $75 - $150 |
| Estimated Total (Aftermarket) | $327 - $525 | $102 - $225 |
Note: Labor costs are estimates and vary by region and shop. The significant difference is due to the 2-3 hours of labor required for the 2004 model versus the 0.5-1 hour for the 2005-2006 models.
Frequently Asked Questions
Is there a recall on the GTO camshaft position sensor?
No, there are no specific recalls or widespread Technical Service Bulletins (TSBs) from General Motors or the NHTSA for camshaft position sensor failure on the 2004-2006 Pontiac GTO. Failures are typically due to normal wear and tear from heat and age.
Can I replace the sensor myself?
For a 2005-2006 GTO, this is a very DIY-friendly job for someone with basic tools and mechanical skill. It involves removing the belt and a pulley for access. For a 2004 GTO, this is a much more advanced DIY job. It requires removing the fuel rails and intake manifold, which can be intimidating and requires careful reassembly to avoid vacuum or fuel leaks.
Do I need to perform a relearn procedure after replacement?
Generally, a specific camshaft sensor relearn procedure is not required. However, some sources suggest that a crankshaft position variation relearn might be recommended by GM after any work on timing components. The car will typically run fine without it, but clearing any stored codes with an OBD-II scanner 🎬 Learn how to diagnose a P0342 camshaft circuit low code. is always a good final step.
Should I replace the crankshaft position sensor at the same time?
It is not strictly necessary, but some owners choose to do so, especially if the symptoms were unclear or if they are replacing the hard-to-reach camshaft sensor on a 2004 model and want to handle all potential failure points in that area at once. The two sensors work together, but one failing does not automatically mean the other is bad.
Helpful Videos
Technical Specifications
OEM Part Numbers: 12561211 19420911 213-363 12591720 213-3826
The sensor for the 2004 (LS1) is a different part number and physical design from the sensor used on the 2005-2006 (LS2). The LS1 sensor is a longer, cylindrical probe that installs vertically into the back of the block. The LS2 sensor is a smaller, bolt-on unit that mounts to the front timing cover.
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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.
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