Engine Crankshaft Position Sensor Guide for the 2014-2023 Chevrolet Suburban
Experiencing stalling, a no-start condition, or a rough idle in your Suburban? Your crankshaft sensor could be the problem.
- A failing sensor can cause dangerous stalling or leave you stranded with a no-start condition.
- For reliability, choose an OEM-supplier brand like ACDelco or Delphi.
- A 'CASE Relearn' procedure with a professional scan tool is mandatory after replacement to avoid further issues.
- The sensor is located behind the starter motor, making DIY replacement feasible but requiring some effort.
What a Failing Crankshaft Sensor Does to Your Suburban
A bad crankshaft position sensor can cause problems ranging from annoying to leaving you stranded. Because the sensor is fundamental to engine timing, a faulty signal can lead to a variety of symptoms. You might first notice the check engine light, but other issues like rough idling, poor acceleration, and reduced gas mileage are also common. In more serious cases, the engine may stall intermittently while driving or fail to start altogether.
Choosing the Right Aftermarket Sensor
When replacing the crankshaft sensor, you have several options. While an OEM part from the dealer is one choice, the aftermarket offers a range of quality parts that can save you money. These parts are often categorized into different tiers of quality and price.
OEM vs. Aftermarket Quality
For many electronic parts on GM vehicles, brands like ACDelco and Delphi are the original equipment manufacturers. This means the part you buy from them is often identical to the one sold in a GM-branded box, just at a different price point. For a critical sensor like this, sticking with an OEM supplier or a top-tier aftermarket brand is highly recommended to avoid repeat failures. Cheaper, lower-tier brands can be a gamble; while some work fine, others may fail prematurely.
Brand Quality Tiers
- Premium Aftermarket (OEM Suppliers): Brands like ACDelco and Delphi are often the original suppliers to GM. Choosing one of these is the closest you can get to the original part's quality and reliability.
- Quality Aftermarket: Brands such as Standard Ignition (SMP), NGK/NTK, and Hitachi have a strong reputation for producing reliable electronic components that meet or exceed OEM specifications. They are a solid choice for a dependable repair.
- Economy Aftermarket: Brands like Dorman, Walker Products, and Spectra offer a more budget-friendly option. While Dorman is known for creating parts that solve common OEM issues, the quality of their electronic sensors can sometimes be inconsistent according to owner feedback. These brands can be a viable option if budget is the primary concern, but carry a higher risk of premature failure compared to premium brands.
Crankshaft Sensor Replacement Cost
The cost to replace a crankshaft position sensor in a 2014-2023 Suburban can vary. The part itself is relatively inexpensive, but labor can add to the total cost if you have it done at a shop. Below is an estimated cost breakdown.
| Item | Estimated Cost |
|---|---|
| New Aftermarket Sensor | $21 - $73 |
| New OEM Sensor | $52 - $133 |
| Shop Labor | $132 - $199 |
| Total (Shop Repair) | $184 - $331 |
A CRITICAL Post-Installation Step: The CASE Relearn
After replacing the crankshaft position sensor on any 1996 or newer GM vehicle, a Crankshaft Position System Variation Relearn (also known as a CASE relearn) procedure is required. This procedure uses a diagnostic scan tool to allow the engine control module (ECM) to learn the new sensor's specific signal and the minor imperfections of the crankshaft's reluctor wheel. Failing to perform this relearn can result in a persistent check engine light with code P1336, rough running, and inaccurate misfire detection.
Frequently Asked Questions (FAQ)
Where is the crankshaft position sensor located on a 2014-2023 Suburban?
On the V8 engines used in this generation of Suburban, the crankshaft position sensor is typically located on the lower right (passenger) side of the engine block, just above the starter motor. To access it, you will likely need to remove the starter.
Is replacing the crankshaft sensor a DIY job?
Yes, for a mechanically inclined person with the right tools. The main challenge is accessing the sensor, which requires removing the starter. The job can be done with basic hand tools, a jack, and jack stands. However, the mandatory CASE relearn procedure requires a compatible professional-grade scan tool, which most DIYers do not own. You may need to have a shop perform the relearn procedure after you replace the part.
Are there any recalls for the crankshaft sensor on these Suburbans?
There are no specific recalls for the crankshaft position sensor itself on the 2014-2023 Suburban models. There was a recall for older 2001 models with the 8.1L engine. More recent recalls for 2021-2024 Suburbans mention potential defects in the crankshaft itself, but not the sensor.
What are the common diagnostic codes for a bad crankshaft sensor?
The most common trouble code is P0335 (Crankshaft Position Sensor 'A' Circuit Malfunction). You may also see P0336 (Crankshaft Position Sensor 'A' Circuit Range/Performance). After replacement, if the relearn procedure is not performed, you will likely see a P1336 code.
Technical Specifications
OEM Part Numbers: 12674702 12596851
This is a Hall Effect sensor that reads the crankshaft reluctor wheel to determine engine speed and position. It typically uses a 3-wire connector (power, ground, signal).
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.
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