2003 silverado 5.3
keeps going into reduced power
i have changed tps,maf sensor , plugs and wires, throttle body,transmission module,grounded all parts to battery tps,trans mod.,ecm and checked body ground and motor ground nothing has fixed it yet sonetimes it will go a month without doing it and like today 4 times in 25 minutes please help with any suggestions maybe a ecm thankyou for feedback
also changed gas pedal and tac module also i can turn the key off and it goes away

 

post the codes that are setting in the ECM

 

Tech2 the codes are p0210,p0161,p1516,p2135

 

pm'ed u

 

Did you ever figure it out? I have the exact same issue and have replaced all the same parts. Mines only showing p2135.