GM GENUINE PARTS Heated Oxygen (O2) Sensor for 2003–2005 GM Trucks & SUVs — Part 213-1702 (12587785), Direct-Fit Heated OEM Replac

GM Genuine Parts 213-1702 (12587785) is a direct-fit heated oxygen (O2) sensor engineered to restore accurate exhaust oxygen readings for compatible 2003–2005 GM trucks and SUVs.

This heated O2 sensor is an OEM-quality replacement produced to General Motors specifications, intended to deliver the same fit, connector type, and performance characteristics as the original factory component. It senses the oxygen level in exhaust gases and supplies a precise voltage signal to the engine control module so the air–fuel ratio can be managed efficiently. Using a GM-validated sensor helps maintain emissions control, drivability, and fuel economy for vehicles originally built with this hardware.

How does this heated oxygen sensor affect engine performance?

The sensor provides the engine control module with real-time oxygen concentration data so it can adjust fuel delivery. When the ECM receives accurate signals, combustion stays closer to the intended air–fuel target and throttle response and idle stability are improved. Conversely, a faulty sensor can cause rough idle, increased fuel use, or emission test failures.

• Provides consistent voltage feedback for closed-loop fuel control
• Improves drivability by helping maintain proper air–fuel balance
• Designed to meet GM OE calibration and response timing

What makes this part a GM Genuine replacement?

This oxygen sensor is manufactured and validated to General Motors' engineering criteria for fit, electrical connector, and thermal properties. It uses a heated element to reach operating temperature quickly, matching the original equipment’s performance. Choosing a GM Genuine part reduces the risk of fitment or calibration discrepancies common with some aftermarket units.

• Built to GM OE specification for fit, form, and function
• Includes matching male connector for direct plug-in installation
• Heated design for fast warm-up and dependable signal output

Which vehicles does this sensor fit and how do I verify compatibility?

This specific sensor fits a range of GM full-size trucks and SUVs from model years 2003 through 2005. Always confirm part number compatibility with your VIN, engine type, and the sensor location required (upstream vs downstream) before purchase. Dealer parts departments or online GM parts lookup tools can verify exact match using the GM part number 12587785 or 213-1702.

• Fits: 2003–2005 GMC Yukon, Yukon XL 1500; GMC Sierra 1500
• Also fits: 2003–2005 Chevrolet Tahoe, Suburban 1500, Silverado 1500, Avalanche 1500
• Included connector gender: male — check vehicle harness for plug compatibility

How should this sensor be installed and maintained?

Installation typically requires access under the vehicle or along the exhaust manifold/pipe depending on sensor location; basic hand tools and an oxygen sensor socket make the job straightforward for experienced DIYers. Use anti-seize on the threads if recommended and torque to GM specifications. Periodic inspection for wiring damage and secure mounting helps prolong service life.

• Install with the correct torque and harness routing to avoid strain
• Replace damaged wiring or connectors to ensure accurate signals
• Follow vehicle service manual steps or use a qualified technician if unsure

Who is this for: Owners, technicians, and restoration shops working on 2003–2005 GM full-size trucks and SUVs who want an authentic OEM-caliber heated oxygen sensor. It’s suitable for anyone replacing a failing O2 sensor with the goal of restoring proper emissions control, fuel economy, and engine management without aftermarket fitment unknowns.