GM TRUCKS 84378257 Gas Accelerator Throttle Sensor Pedal

( Brand: Gm Trucks ), ( Manufacturer Part Number: 84378257 ), ( Part Type: Throttle Sensor Pedal ), ( Id: 2f8f5099-364a-48dc-ba12-bbf0616892ce ), ( Year: 19 )

Review GM TRUCKS Chevy Gas Accelerator Throttle Sensor Pedal Oem fits TAHOE 2012–2020

The **GM 84378257 Throttle Position Sensor (TPS) and Accelerator Pedal Assembly** for the **2012 2020 Chevrolet Tahoe** is a precision-engineered component designed to regulate engine performance by monitoring throttle position and pedal input with exceptional accuracy. This high-quality aftermarket replacement is meticulously crafted to match the original equipment specifications, ensuring seamless integration with the Tahoe s fuel-injected, computer-controlled powertrain whether paired with the standard 5.3L V8, the 6.2L V8, or the optional 6.2L Duramax diesel. The assembly combines a robust **throttle position sensor (TPS)** with a durable **accelerator pedal mechanism**, utilizing advanced Hall-effect technology to deliver real-time feedback to the vehicle s engine control module (ECM). This allows for precise throttle response, optimized fuel delivery, and smooth acceleration, even under heavy loads or varying driving conditions. Constructed from premium materials, including corrosion-resistant metals and high-grade plastics, this sensor is built to withstand the rigors of daily driving, extreme temperatures, and prolonged exposure to moisture common challenges faced by vehicles in diverse climates. The design incorporates a **direct-mount interface**, ensuring a secure and leak-free connection to the firewall, while the accelerator pedal itself features a **smooth, progressive action** that mimics the original factory feel, reducing the risk of erratic throttle behavior or false "limp mode" activations. Ideal for both DIY enthusiasts and professional mechanics, this sensor is a direct-fit solution that restores optimal engine performance, eliminates rough idling, stalling, or hesitation, and helps prevent check engine light (CEL) codes related to **P0120, P0121, P0122, or P0123** common issues tied to faulty throttle sensors. Whether replacing a worn-out original component or upgrading an older vehicle, this GM-approved part ensures reliability, compatibility, and peace of mind for drivers seeking to maintain their Tahoe s power, efficiency, and responsiveness.

### **Pros and Cons of Buying a Used 2012 2020 Chevrolet Tahoe with a Gas Accelerator/Throttle Sensor Pedal Issue (GM Part # 84378257)**

#### **Pros**

1. **Reliable Platform** The Chevrolet Tahoe, especially in the 2012 2020 model years, is known for its durability and strong resale value. Many owners report few major issues beyond routine maintenance.

2. **High Demand for Used SUVs** The Tahoe remains a popular choice for families and those needing a large, capable SUV, meaning a well-maintained unit should hold its value reasonably well.

3. **Potential for Cost-Effective Repairs** The throttle sensor/pedal assembly (GM part # 84378257) is a relatively common issue, and parts are widely available. Labor costs for replacement are often reasonable, especially if the vehicle is still under warranty or if you perform the repair yourself.

4. **Compatibility with Aftermarket Solutions** Some owners opt for aftermarket throttle body or pedal assemblies, which may be cheaper than OEM parts. This can reduce repair costs further.

5. **Good Towing and Hauling Capacity** The Tahoe is designed for heavy-duty use, making it ideal for those who need to tow trailers, boats, or carry large loads.

6. **Available Service Records** If you find a Tahoe with full service history, you can verify that the throttle sensor issue hasn t been a recurring problem, increasing confidence in the purchase.

7. **Potential for Customization** Many Tahoe owners upgrade engines, suspensions, or interiors, allowing for personalization if you re mechanically inclined.

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#### **Cons**

1. **Throttle Sensor/Pedal Assembly Issues** The most significant drawback is the known problem with the throttle sensor or pedal position sensor, which can cause erratic acceleration, stalling, or failure to respond to the gas pedal. This can lead to unsafe driving conditions if not addressed promptly.

- **Symptoms:** Rough idling, sudden acceleration, engine stalling, check engine light (P0120, P0121, P0122 codes), or the vehicle not accelerating smoothly.

- **Repair Cost:** Replacing the sensor or pedal assembly typically ranges from **$200 $500**, depending on labor rates and whether OEM or aftermarket parts are used.

2. **Potential for Additional Electrical Gremlins** The Tahoe s electronic throttle control system can be finicky, and other sensors (e.g., mass airflow sensor, crankshaft position sensor) may also fail over time, leading to further repairs.

3. **Age-Related Wear** Models from 2012 2020 are approaching or past their prime, meaning parts like transmissions, suspensions, and exhaust systems may require attention sooner rather than later.

4. **Fuel Efficiency Concerns** The Tahoe is not known for exceptional MPG, especially with the V8 engine option. If fuel costs are a concern, this could add up over time.

5. **Depreciation** While the Tahoe holds value better than some SUVs, it still depreciates significantly over time. If you plan to keep it long-term, the cost of repairs may outweigh the vehicle s remaining value.

6. **Recall and Warranty Risks** Older Tahoes may have unresolved recalls or may no longer qualify for extended warranties. Always check the **NHTSA recall database** before purchasing.

7. **Maintenance Costs** Routine maintenance (timing belt, transmission fluid changes, suspension components) can add up, especially if the vehicle has high mileage.

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### **Conclusion**

- You find a well-maintained example with a clean service history.

- You budget for the **throttle sensor repair** (or are comfortable replacing it yourself).

- You prioritize the Tahoe s reliability, towing capacity, and resale value over fuel efficiency.

- You re prepared for potential future repairs as the vehicle ages.

- The throttle sensor issue is severe or recurring, making the vehicle unsafe to drive.

- The vehicle has high mileage (over 150,000 miles) with no maintenance records.

- You re unwilling to invest in repairs or don t have mechanical experience.

- You can find a similarly priced SUV with fewer known issues (e.g., a Ford Expedition, GMC Yukon, or newer Tahoe with fewer recalls).

### **Recommendation**

1. **Get a Pre-Purchase Inspection (PPI)** A mechanic should verify the throttle sensor s condition and check for other major issues.

2. **Negotiate the Price** Factor in the cost of the throttle sensor repair (or have it replaced before buying).

3. **Consider a Warranty** If possible, purchase an **extended warranty** or use a **certified pre-owned (CPO) program** to cover future repairs.

4. **Test Drive Thoroughly** Pay attention to acceleration responsiveness, stalling, and engine behavior under load.

5. **Check for Recalls** Use the **VIN** to verify if the Tahoe has any unresolved recalls via the NHTSA website (https://www.nhtsa.gov/recalls).

**Final Verdict:** A 2012 2020 Tahoe with a throttle sensor issue can be a **solid purchase if you address the problem upfront and maintain it properly**. However, if you re looking for a lower-maintenance vehicle, consider newer models or alternatives with fewer known electrical quirks. Always weigh the repair costs against the vehicle s remaining value and your long-term needs.

Details:

Vehicle Stock #: CT021926. Part Stock #. IMPORTANT!: OEM/AFTERMARKET part in good condition may show signs of wear, light scuffs, scratches or other imperfections as a result this being USED PART. If item is ON SALE, Best Offer option will not apply.

For safety reasons, unloading by hand is NOT ALLOWED. Labor and/or towing fees are not warranted. Shipping: Standard Free shipping via Ground Service, is only within the contiguous 48 states UPS, FedEx and USPS. Your detailed response is required and appreciated.

Condition: 73762. All parts are tested either before or after removal from vehicle. Search for more parts for CHEVY TAHOE. Model: CHEVY TAHOE.

part #: 84378257 prices

• $30.00-$100.00

specifications pedalspadsaz:

• for models: Tahoe
• for makes: Chevy
• for years: 2012-2020
• brand: Gm Trucks
• mpn: 84378257
• part type: Throttle Sensor Pedal
• id: 2f8f5099-364a-48dc-ba12-bbf0616892ce
• year: 19

shipping pedalspadsaz:

• service: Standard
• transit: 3-6 Days
• cost: $0.00
• class: Standard
• type: Fixed

returns pedalspadsaz:

• paid by: Seller
• policy: Returns Accepted
• time: 30 Days

general pedalspadsaz:

• Car Truck Parts Accessories > Interior Parts Accessories > Pedal Assemblies, Pads Parts
• condition: Used

seller pedalspadsaz:

• city: Lincoln, Nebraska
• # reviews: 3603
• rating: 99.8%

payments pedalspadsaz:

• credit card: Diners-club
• other
• wallet: Google-pay

offer pedalspadsaz:

• availability: In Stock
• sold: 0
• quantity: 1
• started: March 28, 2026
• options: Ship-to-home

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