Guess these WIRES!!!???
This harness part is connected to the MAF sensor, and this one has what looks like a heat tape around the plastic. But theres alot of wires??
This is for a 5.3/6.0 Vortec. ( but came from a 6.0 )

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The pre cat (bank 2 sensor 1) is would be:
light green/white and green for the sensor side and purple/white and tan for the heater
The post cat is the purple, pink, black and tan wires. Get a schematic so you can find the correct pinouts in the PCM.
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Im really sure they are the o2 sensor wires but would the passengers side, and drivers side both be in that bundle? It kinda confused me cause i would have thought the drivers side would be of course of the drivers side like the LS1 harnesses, and vise versa.
I have a schematics, but i really dont want to start fishing wires, and pulling my PCM connectors back out. I custom statshed it in my glovebox...
Im almost 99.9% sure they are O2s. But i also pulled up my ALLDATA, and the wires for the sensors were the tan, pur/wht, pnk, blk
If i had a picture of the plugs it would be a whole lot more understanding for me...





