ACDelco 21811798 Remanufactured Engine Control Module (ECM) Gold Series

The ACDelco 21811798 is a Gold Series remanufactured Engine Control Module (ECM), also known as an engine control computer or ECU. This premium replacement module is engineered to restore proper engine management function, regulating ignition timing, fuel delivery, emissions controls, and communication between the vehicle's sensors and systems.

As the brain of your vehicle's powertrain, the ECM continuously processes inputs from sensors throughout the engine and drivetrain, making real-time adjustments to optimize performance, fuel efficiency, and emissions output. This unit carries the OEM cross-reference number 19109049.

Key Features:

• ACDelco Gold Series — a high-quality alternative to original equipment (OE) parts, manufactured to meet expectations for fit, form, and function
• Remanufactured to OE specifications — existing units are disassembled, wear-prone components are replaced with new parts, and damaged or obsolete components are removed
• End-of-line tested — every unit is tested to ensure it performs to ACDelco specifications before leaving the factory
• Environmentally responsible — remanufacturing returns components to service rather than scrapping or disposing of them
• GM-backed quality — supported by General Motors and engineered for GM vehicle platforms
• OEM Cross-Reference: 19109049

Important Installation Note: This part requires programming and/or special setup procedures. GM Service Information describes the procedures and special tools needed to ensure proper operation after installation. Professional installation by a qualified technician with access to appropriate scan tools and programming equipment is strongly recommended.