<HTML><FONT FACE=arial,helvetica><FONT SIZE=2>Just as Shannen said, the oil pressure switch is a redundant voltage supply
<BR>to the fuel pump in case the relay fails. If this is the case, most ecm's
<BR>will set a code 54 fuel pump relay failure. Be warned, the LT1's rely only on
<BR>the relay, there is no oil pressure switch.
<BR>AL</FONT></HTML>