Engine Camshaft Position Sensor: 2001-2005 GMC Savana 3500
Solve starting issues and poor engine performance by understanding this critical sensor in your Savana van.
- A primary symptom of failure is the engine cranking but refusing to start.
- The sensor is located at the back of the engine and can be difficult to access, leading to high labor costs.
- For this critical sensor, choose premium aftermarket brands like Delphi, Hitachi, or NGK for reliability.
- A common trouble code associated with this failure is P0340.
Is Your Savana 3500 Showing Signs of a Bad Camshaft Sensor?
A failing camshaft position sensor can cause a range of problems that you'll definitely notice. Because this sensor's data is so important for engine timing, a bad signal can lead to everything from a simple check engine light to a van that won't start. The most common issue is a "crank, no start" condition, where the engine turns over but never fires up. You might also experience rough idling, stalling, a noticeable loss of power when accelerating, and worse fuel economy.
Check Engine Light Codes
A faulty camshaft position sensor will almost always trigger the check engine light. The most common trouble code is P0340, which points to a problem in the sensor's circuit. You may also see related codes like P0341, P0342, or others depending on the specific failure.
Choosing the Right Aftermarket Sensor
When it comes to engine sensors, not all aftermarket brands are created equal. For a workhorse vehicle like the Savana 3500, choosing a reliable part is key to avoiding future headaches. Many mechanics and experienced owners recommend sticking with brands that are known OEM suppliers or have a strong reputation for quality electronics. Cheaper, no-name sensors have a higher reported failure rate, which could leave you stranded and doing the job twice.
Aftermarket Brand Tiers for Your Savana
- Premium Aftermarket (Recommended): Brands like Delphi, Hitachi, and NGK are often original equipment manufacturers for many car brands. They are widely considered to be as good as the OEM part. Beck Arnley is also a well-regarded brand that often sources parts from the original OE supplier.
- Standard Aftermarket: Brands like Standard Ignition (SMP) and Walker Products offer a balance of quality and value. They are generally reliable for daily use. Dorman is a very popular brand, but their quality can be inconsistent for electronic parts; some work great, while others may fail prematurely.
- Economy Aftermarket: Brands like URO Parts, Prenco, and other lower-priced options can be tempting. However, for a critical sensor like this, the risk of early failure is higher. These are best avoided unless the vehicle is used lightly or you're in a pinch.
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket Part | $18 - $104 |
| New OEM (ACDelco) Part | $75 - $120 |
| Shop Labor Cost | $100 - $250 |
Pro Tip: The camshaft position sensor on many GM Vortec engines is located at the back of the engine block, near the firewall. It can be difficult to reach without removing the intake manifold. While a DIY replacement is possible, the high labor estimates from shops reflect this difficulty.
Frequently Asked Questions
Where is the camshaft position sensor located on my Savana 3500?
On the V8 engines (like the 5.7L, 6.0L, and 8.1L) common in these vans, the sensor is typically found at the rear of the engine, behind the intake manifold, near the oil pressure sensor. It is held in by a single 10mm bolt. 🎬 Watch this step-by-step guide on replacing the sensor on GM V8 engines. Access is tight, and sometimes the intake manifold must be removed to get to it.
Are there any recalls for this part?
No, there are no specific recalls on the camshaft position sensor for the 2001-2005 GMC Savana 3500. Searches of the NHTSA database show recalls for other issues on these vans, but none related to this sensor.
What is a TSB and are there any for this sensor?
A Technical Service Bulletin (TSB) is a notice from the manufacturer to its dealers about common problems and recommended repairs. While there isn't a TSB specifically for a faulty sensor on this model, GM has issued bulletins like 19-NA-212 for a "crank no start" condition that can be misdiagnosed as a bad sensor but is actually caused by a sheared camshaft sprocket pin. Another TSB, 22-NA-080, discusses an engine shudder that can be caused by a sticking camshaft actuator magnet, which is related to the camshaft timing system.
Do I need a special tool to replace this sensor?
No special tools are required for the sensor itself, just a ratchet and a 10mm socket to remove the bolt. However, accessing the sensor may require removing the intake manifold, which involves more tools and time.
Do I need to perform a "relearn" procedure after replacement?
Yes, after installing a new camshaft position sensor, a relearn procedure is often recommended to ensure the engine's computer synchronizes with the new part. This can sometimes be done by driving the vehicle at a steady speed (e.g., 55 mph) for a period, then decelerating slowly. In other cases, a professional scan tool may be needed to perform the relearn.
Helpful Videos
Technical Specifications
OEM Part Numbers: 12575182 12575183 12591720
The specific OEM part number for the camshaft position sensor on the 8.1L V8 engine changes by year. 2001 uses GM 12575182, 2002-2003 uses GM 12575183, and 2004+ uses GM 12591720. It is crucial to match the sensor to your specific engine and year.
We Have This Part in Stock
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: