OYEAUTO Knock Sensor with Harness for Chevy GMC Cadillac 12601822/12589867 — OE-fit, Corrosion‑Resistant

OYEAUTO Knock Sensor with Harness (12601822 / 12589867) is a direct-replacement engine knock sensor kit engineered to restore accurate detonation detection and ECU timing control on compatible Chevy, GMC and Cadillac V8/V6 engines.

This replacement knock sensor and wiring harness from OYEAUTO is built to match OE fit and function for many GM RPO engine codes (LS1, LM7, LQ4, LQ9, and others) used across Silverado, Sierra, Suburban, Tahoe, Yukon, Avalanche and select Cadillac/Hummer/Isuzu models from roughly 1999–2007. The kit receives engine vibration signals, transmits a clear electrical pulse to the vehicle’s ECU, and helps the computer decide whether ignition timing needs adjustment. OYEAUTO stresses fit validation and corrosion-resistant wiring for long-term service life, and the product includes a 12-month warranty.

Will this knock sensor fit my vehicle?

Check fit by matching your vehicle’s original sensor shape, connector, and OE part number to the photos and listed OE aliases. The kit fits many GM engines with 4.8L, 5.3L, 5.7L and 6.0L displacements across the model years and platforms shown in the fitment list.

• Compatible OE numbers: 213-3521, 213-362, 10456603, 12589867 and related aliases.
• Engine RPOs: LS1, LM7, LR4, LQ4, LS6, L59, LQ9, LM4, L33.
• Vehicle examples: 1999–2006 Silverado/Sierra, 2000–2007 Suburban/Tahoe/Yukon, Avalanche 2002–2006.
• Always compare the old sensor and connector to the images before ordering.

How does the sensor and harness affect engine performance?

The knock sensor detects abnormal combustion vibrations and converts them into an electrical signal for the ECU. A functioning sensor helps the engine computer fine-tune ignition timing to avoid knock; a faulty sensor can prevent timing correction and may trigger fault codes or decreased performance.

• Transmits vibration data to the ECU for ignition timing decisions.
• Prevents false knock readings with proper wiring continuity and connector fit.
• Can clear knock-related trouble codes when replaced and the ECU is reset.

What makes the OYEAUTO kit different from cheaper alternatives?

OYEAUTO emphasizes component-level testing and corrosion-resistant harness materials to match OEM durability. The kit is manufactured to meet or exceed OE specifications so it installs easily and maintains reliable signal integrity over time.

• Rigorous fit and function testing for proper installation and signal response.
• Corrosion-resistant wires and connectors to extend service life.
• 12-month warranty for added buyer protection and replacement support.

How do I install or validate the replacement sensor?

Installation is straightforward for technicians and experienced DIYers: disconnect the battery, remove the old sensor, transfer any necessary brackets, fit the new sensor in the same location, and reconnect the harness. After installation, clear any stored codes and test-drive to confirm the check-engine light and drivability issues are resolved.

• Disconnect battery before working near ignition components.
• Compare old sensor’s connector and mounting to the new unit before fitting.
• If codes persist, re-check wiring continuity and connector seating; scan and clear ECU codes.

Who this is for: technicians, independent repair shops and knowledgeable DIY owners who need a reliable, vehicle-specific knock sensor and harness replacement for GM V8/V6 engines from the stated years. Choose this OYEAUTO kit if you require a direct-fit sensor, corrosion-resistant wiring, and a backed 12-month warranty to restore proper detonation monitoring and engine control function.