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I have a 06 lbz 2500 and mytruckit says range shift inhibited and I got 4 codes P 0756 P 0757 P 0848 P 0877 let me know if you can find anything out for me I heard it could be the Nsbu switchI just did Trans go junior tranny lines and tranny filters and a flush it has drove fine for a week though and I did the relearn properly and was driving fine .when installing the tranny pan I had problems with the internal filter staying in place and wasn't getting line pressure at first when trying to do the hoot flush Method..finally got the filter to stay and did the hoot flush could it be something when I did the trans go or the filter possibly falling off or maybe a clip falling off a selonoid b or a selonoide shit the bed I start truck it runs fine you put it in drive and it will move 4 inches ... idk what to do I think the clip may of fell off a selonoide idk what these codes could be .. thanksv