The owner had already replaced the spark plugs, ignition coils, and even the mass airflow sensor, but the problem persisted. The codes were all over the place—random misfires, O2 sensor faults, and a dreaded U0100 (Lost Communication with ECM/PCM).
Programmed 2008 Silverado 2500 ECM Engine Control Module 12617568
Programmed 2003 Silverado 2500 PCM | 88864822 | Plug & Drive
Programmed 2004 Silverado 2500 PCM | 12586242 | Get Back on the Road
2001 Silverado 2500 6.6L Engine Computer Programmed To Your VIN ECM
TRQ Radiator Assembly Aluminum Core Compatible with 02 Chevrolet Avalanche 2500 01-02 Silverado 2500 HD Silverado 3500 Suburban 2500 GMC Sierra 2500 HD Sierra 3500 CU2537
Garage-Pro Radiator Support Cover Compatible with 2003-2006 Chevrolet Silverado 1500, 2003-2006 Silverado 2500 HD, 2002-2004 Avalanche 1500 & 2003-2004 Silverado 2500 - GM1224146
