reduce engine power
 

I have a 05 Chevy Silverado message reduce engine power loss won't go away. I have changed throttle body as well as wiring harness, mass flow sensor also the connector each time it has been replaced at dealership seems its also a guessing game for them :( its way past expensive and I need it fixed like these other post it drives perfectly fine somedays other days it pops up every 30 mins or 10 if you guys could give me any more helpful hints it would be greatly appreciated

Interesting thread.