This is a El Camino with a 06 GTO 6.0L / E40 / 4LE60 / T42. The car ran fine for about 2 years. Then suddenly it had no power. In the attached scan file you can see the ECM pull timing all the way back to - 2 degrees during acceleration. Help!!! this is driving me nuts!

El Camino 06 GTO E40.efi80 El Camino 06 GTO E40 (12604792).ctz.