So I wanted to ask about all the wires that go into the fuse block under the dash of a stock Monte Carlo SS (pic in bottom). I believe that I have it figured out that the left side of the plug is all the engine stuff and the right side is all headlights and that stuff. Do any of you guys remember what wires on the left side you needed to keep for the LSx swap? Whether all/none of them are needed? I had my 5.3's harness modded by Current Performance and would like to get these these wires out of the way but don't want to cut anything prematurely in case I may need them when wiring up the engine.

-Mike

 

Find a pinout and decide for yourself. G-body forums or alldata would likely have it

 

Not exactly sure of how many you need but you need the starter, and ignition. If you are going to run the stock sending units for the gauges you are also going to need them.

 

There aren't very many you will remove. Some are for gauges, one is starter, one is inition power. You can use the ignition power wire to power the new harness.