I have a Magnacharged 05 Silverado 5.3l it has a 90mm T-body with an X-Link water/meth injection, heads, cam headers, dual 3 exhaust. I am running a semi OLSD COS3 with a 2 bar MAP sensor. I had a 2.9 pulley on it for a while, and it would go into REP mode a few times a night at the strip. It never went in until I was just crossing the traps so I just cleared it and went on with my night. I would get a P0102, P1516, and sometimes a P0106 code with it. I recently changed to a 2.6 pulley, and have been going into REP with a P0102, and a P2101 if I hold it at about 60-70% throttle. If I floor it, it will rev up, and often times go into REP with a P1516 and P0102 code. I have done a resistance check on the wires to the Tbody, and they check OK. I have also checked the ground wire to the passenger side head, and that appears to be fine.