Dorman 977-000 Throttle Position Sensor

Overview of the Dorman 977-000 Throttle Position Sensor

The Dorman 977-000 throttle position sensor is designed for precise throttle body monitoring in select GM vehicles. This sensor ensures accurate throttle input data for optimal engine performance in models like the Chevrolet Silverado 1500 and GMC Sierra 2500 HD.

• Durable plastic construction for reliable operation
• Throttle body mounted design for direct installation
• 8-terminal blade type electrical connection with male terminals
• Non-adjustable sensor for consistent factory calibration
• Black finish for corrosion resistance and durability
• Includes installation hardware for convenience

Detailed Product Description

The Dorman 977-000 throttle position sensor is engineered to provide accurate throttle position feedback to the engine control unit (ECU). Constructed from durable plastic, this sensor mounts directly on the throttle body, ensuring precise measurement of throttle plate angle. Featuring an 8-terminal blade type electrical connection with male terminals, it integrates seamlessly with the vehicle's wiring harness. The sensor is non-adjustable, maintaining factory specifications for consistent performance. Its black finish offers protection against environmental factors, contributing to long-term reliability.

Compatible Vehicles and Applications

This throttle position sensor is compatible with a range of General Motors vehicles, including:

• Buick models
• Cadillac Escalade, Escalade ESV, and Escalade EXT
• Chevrolet Avalanche 1500, Silverado 1500, 2500, 3500, Suburban 1500 and 2500, Tahoe, Trailblazer, and SSR
• GMC Sierra 1500, 2500, 3500, Yukon, Yukon XL 1500 and 2500, Envoy XL, Envoy XUV, and Rainier
• Hummer H2
• Express 1500, 2500, 3500 and Savana 1500, 2500, 3500

Common Issues Addressed by the Dorman 977-000 Sensor

• Erratic or unresponsive throttle input readings
• Engine hesitation or stalling during acceleration
• Check engine light triggered by throttle position faults
• Poor fuel economy due to incorrect throttle data
• Inconsistent idle speed or engine surging

Installation Notes and Tips

When installing the Dorman 977-000 throttle position sensor, ensure the throttle body is clean and free of debris. Align the sensor carefully to the throttle shaft to avoid damage. Use the included installation hardware to secure the sensor firmly. Verify electrical connections are tight and free from corrosion. After installation, clear any diagnostic trouble codes and perform a throttle position sensor relearn procedure if required by the vehicle's service manual.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM specifications, providing reliable performance and durability. The 977-000 throttle position sensor undergoes rigorous quality control testing to ensure proper fit and function. This part is backed by Dorman's limited warranty, covering defects in material and workmanship under normal use.