I have a 2000 LS with a 99 GSR head. My 2000 p72 GSR ECU Plugs into my LS Harness perfectly but it will not turn over for the life of it!!. I was told 2000's have immobilizers or something with the ignition that must match the ECU or have to be reset or something is that true? Any1 have a similar problem???? So for now im running my 2000 LS p75 ecu

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IloveAPC &raquo;</TD></TR><TR><TD CLASS="quote">I have a 2000 LS with a 99 GSR head. My 2000 p72 GSR ECU Plugs into my LS Harness perfectly but it will not turn over for the life of it!!. I was told 2000's have immobilizers or something with the ignition that must match the ECU or have to be reset or something is that true? Any1 have a similar problem???? So for now im running my 2000 LS p75 ecu</TD></TR></TABLE>


You'll have to use the same key that came with the ecu you purchased, or send your ecu out to have the immobilzer removed... The key must match the ecu, that is why it won't start...

 

anyone know a place that will remove the immobilizer? or any1 know a better idea to make my motor run?

 

maybe try getting a 96-98 gsr ecu??