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Cadillac Repair/96 Sedan DeVille

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Expert: - 4/28/2011


Question
The "Service Transmission" warning came on, as well as Service Engine Soon light, so I had the transmission filter & fluid changed. Both lights are still coming on after this.  Is more involved for Service Transmission than what I did?  Thanks for your help.

Answer
Hello,

The service engine and service transmission lights may be related and the reason for those lights is that illumination gives diagnostic codes as to what is wrong with the car.
Take it to a service center that has a Tech II hand held scanner so they can see what the diagnostic codes are. Your mileage with the check engine light on will suffer and you could possibly be doing damage to the transmission as well.
You don't have to go to a dealer. Just call around locally and see who has this diagnostic equipment.

Good luck!

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Rob Painter

Expertise

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?

Experience

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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