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Cadillac Repair/Sts shuts off


I have an 05 sts that is shutting off while driving down the road. It doesn't  run rough or miss before it shuts  off like a plug wire might cause it to do it just turns off. You can that put it in neutral and it starts right back up. It might not do it again or it might do it 5 more times .  I have had it to two different cadilllac dealers one said battery terminal was loose and one said fuel filter was plugging up, didn't help. Any help would be appreciated


The first problem is going to a dealer. As a general rule, they are just parts changers on a guess and you are much better off going to a service center with a good reputation.
As for your problem, intermittent problems are impossible to repair, because guessing and replacing perfectly good components can get frustrating and expensive. The problem has to be able to be replicated in order to do a correct diagnoses. I am sure you don't like hearing that and would like a more definitive answer, but that is just how it is. You are not dealing with a common known problem and there are far too many things that could cause the same symptoms.
Don't you find it strange that you are told two exactly different problems, one for fuel, one for electrical?
If a fuel filter plugs up, it does not self repair and needs to be replaced. What a stupid answer from the dealer tech!
What you can do, and I am going to address this on another question as well, is try to do the obvious. Remove the bolt from the frame at the negative battery cable. Make sure you have a good bare metal to bare metal contact and tighten the bolt down.
Other than that, unless it gets to the point that the problem shows up on a constant occurrence, this issue will not be resolved.  

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Rob Painter


Alarm system questions cannot be answered on this forum. These systems are not what I can answer. Without being physically at the vehicle and not knowing what kind of electrical service has been done on the vehicle, there is no possible way to give an accurate answer over the internet. My expertise is in Ignition/key based anti-theft systems. These issues include GM VATS (resistor chip in key blade) PASSLOCK (MRD)-ignition lock rotation based, no special ignition key and the PKIII Transponder (computer chip in key) systems. These systems are not alarm based and are integral with the starting of the engine. This is why I cannot diagnose alarm problems without physically looking at the vehicle: Alarm systems are a completely different annimal than ignition key/lock based anti-theft system. Many alarm questions come from vehicles 10 years old, and since older, many hands that had been involved over the years.I am an expert in all GM factory (ignition/key based)systems. Alarm system questions pose to many situations beyond my knowledge as to what has been done to the vehicle over the years. Some guy may have actually wired the stereo into the alarm system. Who knows? Over my past 30 years in vehicle wiring repair, I have seen unbelievable wiring disaters done by guys that consider themselves "mechanics." I have seen stereos and alarms intalled using surgical tape. I have seen modules burn up, un-fused circuits, wiring jambed between the doors and even lamp cord used for a starter kill. To answer alarm questions over the internet without examining the vehicle is like asking; What does it take to remove a dent?


Education/Credentials-ASE certified. 11 years with a GM dealer and 17 years with a repair facility dealing with only the repair of theft recovered vehicles.

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