Guide to the Throttle Position Sensor for the 2008-2014 GMC Yukon
Experiencing 'Reduced Engine Power' in your Yukon? Your Throttle Position Sensor is a common and fixable cause.
- The 'Reduced Engine Power' message is the number one symptom of a failed TPS on this Yukon.
- This is a very common failure, confirmed by a past GM Special Coverage Program for this exact issue.
- You can replace just the sensor, which is much cheaper than replacing the entire throttle body assembly.
- Always clean the throttle body thoroughly with a dedicated cleaner while it is off the vehicle for the repair.
Is Your Yukon in 'Limp Mode'?
The most common sign of a failing throttle position sensor on this generation of GMC Yukon is a dashboard message stating "Reduced Engine Power." This isn't just a warning; the truck's computer will intentionally limit your speed, often to less than 25 mph, to prevent potential engine damage. This safety feature is commonly called "limp mode." If you see this message, along with a Check Engine Light, the TPS is the most likely suspect.
Symptoms of a Failing 2008-2014 Yukon TPS
- Reduced Engine Power Message: The most definite sign of a problem with the throttle system.
- Check Engine Light: Often, the code P2135 will be stored in the computer, which points directly to a throttle sensor issue. 🎬 See how to diagnose P2135 and Reduced Engine Power codes.
- Hesitation or Stumbling: The truck may hesitate or jerk when you press the gas pedal.
- Rough or Unstable Idle: The engine may idle erratically or stall.
- Poor Acceleration: The Yukon may feel sluggish and slow to respond.
- Erratic Shifting: The automatic transmission may shift harshly or at the wrong times because it's getting bad information from the sensor.
A Well-Known Issue
This part fails so often that General Motors issued a Special Coverage Adjustment (No. 11273) for 2008-2011 Yukons. This extended the warranty on the sensor to 10 years or 120,000 miles. While this program has expired, it confirms this is a very common failure point. The official fix was to replace the sensor and reprogram the engine computer.
Choosing the Right Aftermarket Sensor
For the 2008-2014 Yukon, you can buy the sensor by itself without needing to purchase the entire expensive throttle body assembly. This makes the repair much more affordable. When choosing a new aftermarket part, quality varies by brand.
Brand Quality Tiers
- Tier 1 - Premium Aftermarket (OEM Quality): Brands in this category are known for making high-quality sensors that often meet or exceed original equipment standards. They are an excellent choice for reliability.
- ACDelco (GM Original Equipment): This is the original part your truck was built with. It's the benchmark for fit and performance.
- NGK / NTK: NGK (under their sensor brand NTK) is a world-renowned manufacturer of engine sensors and is often a supplier to vehicle manufacturers. They are a top-tier choice known for quality and reliability.
- Standard Ignition (SMP): A long-standing, reputable brand in the aftermarket, Standard Motor Products is widely considered a reliable choice for electronic components.
- Tier 2 - Standard Aftermarket: These brands offer a balance of value and quality, making them a good option for budget-conscious repairs.
- Motorad: This brand markets its parts as being built to OEM specifications and subjected to rigorous testing.
- Global Parts: Often positioned as a value-oriented brand, providing a functional replacement at a lower cost.
Cost to Replace a Yukon Throttle Position Sensor
| Part / Service | Estimated Cost |
|---|---|
| New OEM (ACDelco) Part | $130 - $180 |
| New Aftermarket Part | $67 - $152 |
| Shop Labor | $80 - $120 |
| Total Professional Replacement | $147 - $302 |
Cost estimates are based on national averages and will vary by location and parts supplier.
Pro Tip: Clean the Throttle Body
Since you or a mechanic must remove the throttle body to access the sensor, it is the perfect time to clean it. Use a dedicated throttle body cleaner and a soft cloth to remove carbon buildup from the throttle plate and bore. This can improve idle quality and throttle response.
Frequently Asked Questions
Is this a difficult repair I can do myself?
For a DIYer with basic tools, this is a very manageable job. It involves removing the plastic engine cover and air intake tube, unplugging a few connectors, and unbolting the throttle body (usually four 10mm bolts). The sensor itself is then swapped on the throttle body. The entire process should take less than an hour.
🎬 Watch: Step-by-step guide to replacing the TPS sensor yourself.Do I need to perform a 'relearn' procedure after installing a new TPS?
Yes, it's a good idea. After the new sensor is installed, a simple idle relearn procedure helps the computer adapt. A common method is to start the engine and let it idle for three minutes, turn the engine off for one minute, then restart and let it idle for another three minutes before driving.
🎬 Watch: A quick walkthrough of the GM idle relearn procedure.Can I just clean the sensor or the wiring?
The sensor itself is a sealed electronic unit and cannot be cleaned. However, you should inspect the wiring harness and connector that plugs into the sensor. Sometimes, a loose connection or frayed wire can cause the same symptoms as a bad sensor. If the wiring looks good, the sensor itself needs to be replaced.
Is it safe to drive with a bad throttle position sensor?
It is not recommended. While the truck is driveable in 'Reduced Engine Power' mode, your speed is severely limited, which can be dangerous in traffic. You should only drive the vehicle directly to a safe location or a repair shop.
Helpful Videos
Technical Specifications
OEM Part Numbers: 19259452
The Throttle Position Sensor for the 2008-2014 GMC Yukon is a 3-terminal electronic sensor that mounts directly to the side of the engine's throttle body.
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 Yukon:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Yukon in 'Limp Mode'?
- Symptoms of a Failing 2008-2014 Yukon TPS
- A Well-Known Issue
- Choosing the Right Aftermarket Sensor
- Brand Quality Tiers
- Cost to Replace a Yukon Throttle Position Sensor
- Pro Tip: Clean the Throttle Body
- Frequently Asked Questions
- 🎟️ Get 5% Off