The only place to get a speed signal on the Alero is from the PCM, On a 3400 Alero (2004), the VSS input is on connector C1 pins 64 and 65. The VSS output to the Cruise Control module, is connector C1 pin 55 (this is probably the one you need). I can double check it for your particular year/model/engine too.
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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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