For those whom might not have seen the post.. I have an 02 simulator used roughly for a few weeks to compensate for a header leak which I had consequently now fixed. The simulator works with LS1 V8's and in fact was made for a corvette. Comes with an LED light indicating communication with the ECU. It worked great on my 2.2L ECOTEC. Paid 120, asking 100 OBO.. Picture can be seen at the FORUM, GM FOR SALE.