Wasn't there a change in the knock sensor too.. Probably went along with the EGR change. The newer models have a 2-wire knock sensor, the older ones only have one.
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Cliff Scott
2004 Alero GX w/sport pkg - Sold, living somewhere in WI now.
2011 Saab 9-5 Turbo4 M6
2004 Corvette Convertible M6
1994 Chevy Beretta - Quad4/M5
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