Hey guys i've not long ago bought a 4.8 gu auto for cheap. Had no exhaust system on when i bought it and now im just finishing it off. Problem is i need to know which 02 sensor plugs into where on the loom as both have the same plug. There is one plug with blue wire/red trace, black, and green. The other is green wire/yellow trace, green, and black. If someone could have a look at theirs and tell me which goes to front and which goes to back that'd be awesome. Thanks