GMC Sierra 2007-2014 Engine Camshaft Position Sensor Replacement Guide
Experiencing stalling or a check engine light on your Sierra? Your camshaft position sensor might be the culprit.
- A failing camshaft sensor can cause serious issues like stalling, a no-start condition, and rough running.
- Always inspect the wiring and connector for damage before replacing the sensor, as this can cause identical symptoms.
- The sensor is known to break during removal; be prepared for a potentially difficult extraction.
- For critical electronics, using a high-quality OEM (ACDelco) or premium aftermarket brand (Delphi, NGK, Standard) is strongly recommended to ensure reliability.
Is Your Sierra Showing Signs of a Bad Camshaft Position Sensor?
When the camshaft position sensor in your 2007-2014 GMC Sierra starts to fail, it sends incorrect or no data to the truck's computer. This can cause a range of noticeable problems that you shouldn't ignore.
Check the Wiring First!
Before you buy a new sensor, take a close look at the wiring harness and connector. On these trucks, the wiring can get damaged from engine heat and vibration, which can cause the exact same symptoms as a bad sensor, including triggering codes P0340 and P0341. Sometimes, a simple cleaning or wire repair is all that's needed. A Preliminary Information bulletin from GM (PIP5335) specifically points to checking for corrosion in connector X154 on the front cover for these codes.
Choosing the Right Aftermarket Camshaft Sensor for Your Sierra
When it comes to critical electronic sensors, quality matters. While an OEM ACDelco sensor is the benchmark, several aftermarket brands offer a good balance of quality and price. Many owners and mechanics have strong opinions on this topic, with some insisting on OEM-only for electronic parts to avoid the frustration of a faulty new part.
Here's a breakdown of available brands:
- Premium Aftermarket (NGK, Standard Ignition, Delphi): These brands have a strong reputation for producing reliable electronic components that often meet or exceed OEM specifications. Delphi, in particular, has a close relationship with GM, and their parts are often considered OE-equivalent. Standard Motor Products (Standard Ignition) is another trusted name in the industry.
- Reputable Aftermarket (Walker Products, Dorman): These brands offer a more budget-friendly option. Walker Products is often mentioned as a reliable choice. Dorman parts can be hit-or-miss; while some products are excellent, reviews for their electronic sensors can be mixed, with some users reporting failures right out of the box.
- Value Brands (Global Parts, Prenco, True Tech): These are typically the most affordable options. While they can save you money upfront, their long-term reliability and performance may not match that of premium brands. For a sensor that is difficult to access, saving a few dollars on the part might not be worth the risk of having to do the job twice.
A Note on Installation Difficulty
The camshaft position sensor on these GMT900 trucks is located on the front of the engine block, behind the water pump. Due to constant heat exposure, the plastic sensor body often becomes brittle and seizes in the engine block. It is very common for the sensor to break during removal, leaving a piece stuck in the engine. This can turn a 30-minute job into a multi-hour ordeal that may require removing the water pump for access. Be prepared for this possibility if you are attempting the replacement yourself.
🎬 Watch this step-by-step GMT900 cam sensor removal and replacement guide.Cost of Replacing a Camshaft Position Sensor
| Part or Service | Estimated Cost |
|---|---|
| New OEM (ACDelco) Sensor | $50 - $90 |
| New Aftermarket Sensor | $27 - $57 |
| Shop Labor | $100 - $200 |
| Total Professional Replacement | $150 - $300 |
Frequently Asked Questions
Where is the camshaft position sensor located on a 2007-2014 Sierra?
The sensor is on the front of the engine block, located behind the water pump and slightly to the passenger side. On some engine configurations, like the 5.3L V8, it can be seen at the back of the valley pan under the intake manifold, but on most 2007-2014 models, it is on the front timing cover.
Can I drive my Sierra with a bad camshaft position sensor?
It is not recommended. While the truck may run for a while, a failing sensor can cause the engine to stall at any time, which is a serious safety risk. The engine may enter a "limp mode" with reduced power.
What's the difference between codes P0340 and P0341?
P0340 generally indicates a circuit malfunction, meaning there's no signal from the sensor (e.g., bad sensor, broken wire). P0341 indicates a range or performance problem, meaning the computer is receiving a signal, but it's erratic, out of sync with the crankshaft sensor, or not what it expects to see. Both codes point to a problem in the same system.
🎬 Watch: How to diagnose and fix a P0341 trouble code.Are there any recalls for this issue?
As of now, there are no specific recalls for the camshaft position sensor on 2007-2014 GMC Sierra models. Searches of NHTSA data show recalls for other engine issues on different model years, but not this specific component in this year range.
Do I need a special tool to replace the sensor?
Basic hand tools like a 10mm socket and ratchet are needed for the bolt. However, if the sensor breaks during removal, you may need picks, pliers, or even have to remove the water pump 🎬 See how to remove a broken sensor stuck in the block. to get the broken piece out, which requires more tools and time.
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Technical Specifications
OEM Part Numbers: 12623093 213-1690
The sensor is located on the front of the engine block, behind the water pump. It is a 3-pin sensor held in by a single 10mm bolt.
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 Sierra:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Sierra Showing Signs of a Bad Camshaft Position Sensor?
- Check the Wiring First!
- Choosing the Right Aftermarket Camshaft Sensor for Your Sierra
- A Note on Installation Difficulty
- Cost of Replacing a Camshaft Position Sensor
- Frequently Asked Questions
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