I purchased my truck in a box after someone had removed the head to replace the gasket.After I got it running the transmission has been in limp mode.After many hours of research on this site and slowly checking off what I found out not to be wrong I came across the grounds.the one to the block was not hooked up Which helped on most of the symptoms.I am unable to find an acurate wiring diagram and /or locations for where the others should be.No error codes appear to be stored in the tcm.(Wouldnt have found that one without this site).Thanx to the webmasters and users who share thier information.Dan