n*aurora Posted September 27, 2010 Report Share Posted September 27, 2010 Anyone remember what piggyback marks 99sts used??? It maintained the stock gauges/pcm functions. Link to comment Share on other sites More sharing options...
BodybyFisher Posted September 27, 2010 Report Share Posted September 27, 2010 See this thread, he used a piggyback unit from PCS http://caddyinfo.ipbhost.com/index.php?showtopic=15812&st=0&p=114688&hl=piggyback&fromsearch=1entry114688 See this http://www.powertraincontrolsolutions.com/ Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
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