It has been a few years since I have had to buy a set, and it seems like nobody makes them anymore. All I found were the ones where you can splice into your own O2 harness or create your own with Radio Shack resistors.

I don't want to do any splicing, I just want an O2 Simulator that plugs in line with my O2 sensor.

I found some for Fords, but nothing for GM's