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Cadillac Repair/99 SLS starter issue


Hi Rob, My 99 SLS has had a starting issue for about 6 months. In the morning when I start it for the first time, the starter will engage but not turn the engine over until the 3rd or 4th try, then it usually cranks slowly but starts. Once it has started, I have no further starting problems for the rest of the day. Next morning, same thing. I have checked and cleaned all the grounds I can find even added an engine to chassis ground of my own. I replaced the battery because the original was at least 6 years old. I don't have an amp meter but the voltage does not drop excessively when trying to start so I didn't think the starter was drawing too much current but I'm guessing now that it is maybe a dead spot or the brushes are going bad. Any other suggestions before I rip the manifold off to get at the starter? Thanks, Alan

Hello Alan,

I am sorry I could not get back to you sooner, but I was in Oregon for a deposition.

Not sure what you mean by the starter engaging, but not turning the engine over. From your description though, I too would be looking at the starter.  

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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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