Engine Camshaft Position Sensor Guide for the 2012-2017 GMC Savana 3500
Keep your Savana's engine running smoothly by understanding and replacing a failing camshaft position sensor.
- A failing sensor will cause noticeable driving problems like hard starts, stalling, and poor acceleration.
- Don't ignore the Check Engine Light; codes P0340-P0344 are a direct pointer to this sensor.
- For reliability, choose a high-quality aftermarket brand that is an OEM supplier, like Delphi or Hitachi.
- Replacement is a manageable DIY job for most, but be aware that a 'relearn' procedure might be necessary.
Is Your Savana 3500 Running Rough? It Could Be the Camshaft Sensor
If your work van suddenly develops issues like stalling, poor acceleration, or has trouble starting, a bad camshaft position sensor is a likely suspect. This sensor is critical for engine timing, and when it fails, it can cause a range of frustrating problems. Since these vans are often used for work, getting it fixed right the first time is important to avoid downtime.
Known Issues: Shuddering or Surging
General Motors issued a Technical Service Bulletin (TSB 22-NA-080) for some GM vehicles, including the Savana. Owners might feel a shudder or surge at steady speeds, which can feel like a transmission problem. This can actually be caused by a sticking camshaft actuator magnet, a related part in the camshaft system. If you experience this symptom, it's important to consider this possibility during diagnosis.
🎬 Watch: How to replace a sticking camshaft actuator solenoid.Choosing the Right Aftermarket Sensor
When replacing this sensor, you have a choice between OEM and a wide variety of aftermarket brands. For a critical sensor like this, quality matters more than saving a few dollars. A cheap, poorly made sensor can fail quickly, leaving you with the same problem again.
Tier 1: OEM Quality Aftermarket
These brands are often the original equipment manufacturers for GM and other automakers. They offer dealership-level quality without the dealership price tag. Choosing one of these is your best bet for a reliable, long-lasting repair.
- Delphi: A well-known OEM supplier for General Motors. Parts from Delphi are expected to meet or exceed factory specifications, making them a top choice.
- Hitachi: Another Tier 1 OE supplier known for high-quality electronics. They are a trusted name for sensors and provide excellent reliability.
- NGK/NTK: While famous for spark plugs, their sensor line (NTK) is also highly regarded and often used as original equipment.
- Standard Ignition (SMP): A long-trusted brand in the professional repair community, known for extensive testing and quality control.
Tier 2: Reputable Aftermarket
These brands offer a good balance of price and quality and are a solid choice for most owners.
- Walker Products: Known for good engineering, especially for fuel and engine management parts.
- Holstein: Focuses on sensors and electrical components, offering direct-fit parts.
Tier 3: Economy Brands
While brands like Dorman, Global Parts, True Tech, and Prenco are available at a lower price point, they can be a gamble. Some forum discussions and mechanic experiences suggest that budget sensors, including some from Dorman, can have higher failure rates. For a part that is critical to engine operation and can cause a no-start condition, it's often wise to invest a little more in a higher-tier brand.
| Part Type | Estimated Part Cost | Estimated Labor Cost | Total Estimated Cost |
|---|---|---|---|
| New OEM (ACDelco) | $60 - $125 | $100 - $200 | $160 - $325 |
| New Aftermarket (Premium) | $50 - $90 | $100 - $200 | $150 - $290 |
| New Aftermarket (Budget) | $27 - $50 | $100 - $200 | $127 - $250 |
Pro Tip: The sensor is relatively easy to access and replace on most Savana engines. If you have basic tools and mechanical skill, you can save over $100 in labor by doing it yourself.
🎬 Watch this step-by-step guide to replacing the sensor yourself.Frequently Asked Questions
Where is the camshaft position sensor located on my Savana 3500?
The location can vary slightly depending on your specific engine (4.8L, 6.0L V8). Generally, you will find the camshaft position sensor mounted on the front timing cover or on one of the cylinder heads near the top of the engine. It is a small component held in by a single bolt with an electrical connector attached.
Do I need to perform a 'relearn' procedure after replacing the sensor?
Some GM vehicles may require a camshaft position variation relearn procedure for the ECM to recognize the new sensor correctly. Often, the vehicle will learn on its own after some driving. However, if you still have issues after replacement, a professional scan tool may be needed to perform the procedure.
Can a bad camshaft sensor be confused with a crankshaft sensor failure?
Yes, the symptoms are very similar. Both sensors provide critical timing information. A diagnostic trouble code (DTC) scan is the best way to tell them apart. A P0340 code points to the camshaft sensor circuit, while a code like P0335 would indicate a crankshaft sensor issue.
🎬 See this breakdown of P0340 causes and how to fix them.Is it safe to use a cheap sensor?
It is not recommended. Critical engine sensors are not the place to cut corners. A low-quality sensor can fail prematurely or provide inaccurate readings, leading to poor performance, bad fuel economy, or leaving you stranded. Investing in a quality brand like Delphi, Hitachi, or Standard Ignition is a safer choice.
Helpful Videos
Technical Specifications
OEM Part Numbers: 12591720 12703627 213-4223
The sensor for the 2012-2017 GMC Savana 3500 is typically a 3-pin Hall-effect sensor. It is crucial to match the sensor to your specific engine (e.g., 4.8L, 6.0L V8), as the design and mounting can differ.
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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.
- GMC Savana 3500:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Savana 3500 Running Rough? It Could Be the Camshaft Sensor
- Known Issues: Shuddering or Surging
- Choosing the Right Aftermarket Sensor
- Tier 1: OEM Quality Aftermarket
- Tier 2: Reputable Aftermarket
- Tier 3: Economy Brands
- Frequently Asked Questions
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