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This is a refurbished and programmed ECM/PCM/ECU unit, guaranteed to replace the original for 2010 Chevrolet Suburban models with a 5.3L engine and matching part number 12633238. It comes programmed to the vehicle's specific VIN, flashed with the most recent updates for enhanced fuel economy and optimized performance. No additional programming or locksmith services are required after installation. The unit is individually inspected, fully refurbished, and quality control tested by certified in-house mechanics. It addresses common PCM issues like electrical problems, failure to start, fault codes, intermittent problems, loss of power, no ignition/injector pulse, poor fuel economy, and shifting problems.