slow93z

Hey guys, wondering what wiring harness and computer I need to use with a 5.3 and 6 speed. Also if later on down the line I swap a 6.0 with ls3 heads can I use that same harness. Thanks for the help!

welldonecj7

iTrader: (13)

Mostly will depend on the year of the engine as to what harness and pcm you will need as well as if dbw or dbc. If u plan to keep same gen 6.0 and same style tb you should be able to run the same harness and pcm (although will need returned obviously) and if u decide to go dbw u will likely need an adapter such as the x link when u go to the 90mm tb.

slow93z

Yeah I believe they are the same gen. And I will most likely run the cable driven throttle body on both engines. Is there anything I need to do for wiring the 6 speed?