Luke Posted July 16, 2015 Report Share Posted July 16, 2015 I posted this in a model specific forum with little response. My 2006 DTS has 165,000 miles. I've since purchased a 2008 DTS Performance Ultra Luxury but still love my 2006 and would like to get it going again. Sometime a couple of years ago, my DTS started occasionally dinging and showing SERVICE TRACTION CONTROL & SERVICE STABILITRAK. Over time, it became more and more frequent. The car had always had a slip in the transmission. I assumed the two were related. So, I had a used transmission with 24k miles installed. Not only did the transmission not fix the problem, it is worse. Still get the dinging and messages and now the engine idles rough. In all my searching online, and all the different recommended repairs, NEW parts the car has had: *intake gaskets and plenum *MAF sensor *MAP sensor *throttle body and gasket *evap purge solenoid *gas cap *EGR valve and gasket *valve cover gaskets *alternator (bad alternator was causing the engine to rev and I almost rear-ended someone) I took the intake manifold off last night to inspect for cracks and found nothing. There just doesn't seem to actually be a vacuum leak. I have blocked off every vacuum connection to the engine and none have improved the problems. Whatever is wrong, it's fooling it into thinking it's a vacuum leak. I even took the car to Sewell Cadillac in Dallas (very poor dealership). They found nothing wrong. Charged me $500 for a new EGR gasket and to charge the battery. I fought it and got a full refund. I have searched everywhere more for a solution. Ideas I have found online include bad O2 sensors, bad coils, bad spark plugs, bad/clogged fuel pump, bad injectors, etc. Spark plugs only have maybe 20,000 miles on them. These codes and messages are not uncommon on 2005 and older Northstars due to the intake plenum tearing but seem very rare on 2006+ cars. I have no idea where to go from here. Does anyone have any idea? Anyone experience this on a 2006+ DTS and found a solution? Quote Link to comment Share on other sites More sharing options...
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