Hey guys i have a 2007 Silverado 2500HD Classic 6.0 liter and i got a issue at wot! when i hammer the truck it goes thru 1st gear no problem and shifts to second. Once in second gear it climbs to 4k and then the rpm stops and hesitates there for a second or two then climbs again and the truck really feels to pull again. Then once in third it flat lines again at 4k and actually dropped 300 rpm on me while still at full throttle a couple of times. I have removed torque management but it did this before hand. No problems with starting, idle or cruising just at wot. i have cleaned the throttle body, cleaned the mass air flow sensor, clean air filter. kinda puzzled would appreciate input. Fuel problem, sensor gone bad, ???? Also truck has 27000 miles and all stock

 

Could you give us some more details so we could better point you in the right direction???

Are you doing the tuning your self ??? If so what software are you using???

Besides TQ managment what else was changed???

Are you taking logs every time you make a changes???