Hi everyone.

The truck is approaching 190k miles and the stock L05 and 4L60e are getting tired. I have a complete low mileage 2005 5.3 With ECM and harness left over from another project. Looking for input on swapping this into my truck.

One initial question. Should I rebuild my trans and keep the 427 ECM to control trans only, or go find a late model trans compatible with my LS computer?

look forward to ideas

thanks