Ok, i know that it just a light show.... now, for those of you who do have one.... what wire did you splice into near the PCM? purple, purple/white, Don't know what's the best one to cut into. Also did you hook-up both o2's?
Thanks !

 

I used the a/f connector on this page

https://www.casperselectronics.com/M...urbanSilverado

Just have to get the one with the right connector for your truck. And only 1 O2 is hooked up. If you want both, you will need 2 gauges.