Ok I am thinking of purchasing a new instrument cluster for my 05 GT.I currently have the 4 gauge cluster and would like to go to the 6 gauge cluster but I don't know if my wiring harness will work and ifI need to change it to get the voltage meter and oil temp to work, or if I can just add the sending units and wire it myself. Any thoughts or ideas?

 

stock wiring works fine.

 

Anyone else have any input?

 

lets try this again....stock wiring works fine.

I and many others have done this and there are at least 10 threads about it on here.