GMC Yukon Crankshaft Position Sensor Guide (2002-2016)
Fix stalling, no-start, and rough running issues on your 2002-2016 GMC Yukon by understanding the crankshaft position sensor.
- A mandatory 'CASE relearn' procedure with a professional scan tool is required after replacement.
- Symptoms are often worse when the engine is hot, including sudden stalling.
- For reliability, choose OEM-equivalent brands like ACDelco or Delphi to avoid repeat repairs.
- The sensor is located behind the starter motor, which must be removed for access.
Is Your Yukon Stalling or Hard to Start?
A failing crankshaft position sensor is a common reason for a GMC Yukon to stall, especially when the engine gets hot. You might also find the engine cranks for a long time before it finally starts, or it might not start at all. Other signs include a rough idle, engine misfires, poor acceleration, and the Check Engine Light coming on. These issues happen because the engine's computer is guessing where the crankshaft is, leading to bad timing for fuel and spark.
🎬 Watch: 6 common symptoms of a bad crankshaft sensorThe CASE Relearn Procedure is NOT Optional
After replacing the crankshaft position sensor on any 2002-2016 GMC Yukon, a Crankshaft Position System Variation Learn (also known as a CASE relearn) is required. This procedure uses a professional scan tool to calibrate the new sensor to the minor imperfections on your engine's crankshaft reluctor wheel. Skipping this step will likely cause the Check Engine Light to stay on with a P1336 code, and you may still have performance problems like misfires. Most DIY scan tools cannot perform this function.
🎬 See how to perform a CASE relearn using a scan toolChoosing the Right Aftermarket Sensor
When it comes to critical sensors, quality matters. While saving money is tempting, a cheap, unreliable sensor can fail quickly, leaving you stranded and forcing you to pay for the repair and another CASE relearn.
- Premium Aftermarket (OEM-Equivalent): Brands like ACDelco (the genuine GM parts brand) and Delphi (often the original company that made the part for GM) are highly recommended by mechanics and experienced owners. NGK/NTK and Hitachi are also well-regarded OEM suppliers that produce high-quality sensors. These are your most reliable choices.
- Standard Aftermarket: Brands like Dorman, Standard Ignition (SMP), and Walker Products offer a more budget-friendly option. While they can be a good value, forum discussions show mixed results, with some owners reporting premature failures or sensors that are dead on arrival. If you choose a standard brand, be sure it comes with a good warranty.
Pro Tip: Given that a professional scan tool is needed for the CASE relearn, it's wise to invest in a quality part to avoid doing the job twice. The small savings on a budget sensor are quickly lost if you have to pay for labor and a second relearn procedure.
Cost to Replace the Crankshaft Position Sensor
| Item | Estimated Cost |
|---|---|
| New OEM (ACDelco/Delphi) | $50 - $110 |
| New Aftermarket | $27 - $98 |
| Shop Labor (Part + Relearn) | $200 - $350 |
*Costs are estimates and can vary based on your location, vehicle's engine, and the repair shop.
Frequently Asked Questions
Where is the crankshaft position sensor located on a 2002-2016 GMC Yukon?
For most V8 engines in this year range (4.8L, 5.3L, 6.0L, 6.2L), the sensor is on the passenger side of the engine block, just above the oil pan rail. It is hidden behind the starter motor. You must remove the starter to access and replace the sensor.
Can I replace this sensor myself?
Yes, a skilled DIYer can replace the sensor. The process involves safely lifting the vehicle, disconnecting the battery, and removing the starter motor (typically held by two 13mm bolts). The sensor itself is held by a single 10mm bolt. 🎬 Watch this step-by-step sensor replacement walkthrough for 2007-2014 models However, you will still need to take the vehicle to a shop with a capable scan tool to perform the mandatory CASE relearn procedure.
What happens if I don't do the CASE relearn?
The engine's computer will not have an accurate reference for the crankshaft's position. This can lead to persistent misfires (especially a P0300 code), poor performance, reduced fuel economy, and a Check Engine Light with code P1336, which specifically means the variation learn has not been performed.
Is there a recall for the crankshaft position sensor on the GMC Yukon?
No, there are no specific recalls for the crankshaft position sensor on 2002-2016 GMC Yukon models. There are recalls for newer models related to the crankshaft itself, but not the sensor for this year range.
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Technical Specifications
OEM Part Numbers: 12560228 213-354 12674703 213-970 12613030
The sensor is a magnetic or Hall-effect type sensor held in place by a single bolt. It reads a reluctor wheel on the crankshaft to determine rotational speed and position. Different part numbers exist for different engine and year combinations within the 2002-2016 range.
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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 Yukon: