I have a 2009 Tahoe. I flashed with a stock 2009 police Tahoe with a 5.3 tune. Now I get p0606 code and the throttle quits working after a few minutes. The tune was supposed to give better throttle response according to the individual that sent it to me. This is the first gen 4 I have messed with. I figured the police package would be a good place to start. It sorta has similar symptoms to a gen 3 bad tac module but does not have a tac. Any ideas?