first that we have to do is a scanering to you truck. why because with that we know what really hapened wiht this truck knowling the failury codes. but if wi have a answer will be,
1.- Clean de intectors echa bay one.
2.- change filters, gas or gasoil...diessel
3.- check relays and fuel pump.
4.-check the timing chain. this could be wasted. and not work very well.so then we need,Wiring harness of conexion can be the solucion. but try to do more many things. ok
I told earlier of replacing the throttle body sensor as a result of getting a check engine light and a readout on the Driver Info Center of "Reduced Engine Power." I then said a few thousand miles later I got the same problem. This time, it was a wire that had come loose in the throttle body sensor, so they replaced the wiring assembly and the harness for the throttle body sensor, and all is well again. this that i said before.
next chec de computer of you truck. and then we read this Unfortunately, after reading the manual there are several reasons that you could
see "reduced engine power" message. (the first two that come to mind are related
to the DEF and the transmission - I doubt you were overheated since this was the
first start of the day - but perhaps a sensor is malfunctioning in one of those
systems) we need to check it. again next if possibl change the gasoli or diessel one better and more quality.this could be good.
after.otgher thing i say You probably should take it to the stealership and have them
scan it but it could quite possibly have something to do with the electronic
throttle control Most likely the throttle body a somwhat common problem on the
trucks with the 5.3 and 6.0 with electronic throttle control the
electronic throttle control is what triggers the reduced engine power and not run.
wel iam glad to help you and reciv all my regards XXXXX XXXXX hoppe tah you can doit and all is possible.thanks a lot of you