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Cadillac Repair/2004 Deville Ride Control

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Expert: - 6/24/2011


Question
QUESTION: I had always heard my ride control compressor do a self test whenever the vehicle was started. I no longer hear this.
I checked the fuse and relay, and they are good.

Can you tell me where the compressor for the rear shocks is located so that I can test it.

I have no service ride control warnings. Do you think there is a problem, or is it in my head?

I am getting ready to replace the rear shocks now. The car has 204,000 miles on it and the shocks and struts are original.

ANSWER: Hello,

Compressor is under hood, usually mounted on inner fender. If the back doesn't squat or the compressor run constantly would not worry about it and would not even replace the shocks at this time.


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---------- FOLLOW-UP ----------

QUESTION: Just for your information, the ride control air compressor is located above the muffler on the passenger side of the car.

I replaced the rear shocks because I found one was leaking oil. My problem is fixed. Thanks for your help.

BTW I used Monroe-Matic air shocks. Direct replacement. Both done in 2 hours. Saved tremndous amount of money versus the OEM parts.

Answer
Hello,

I gave the general answer on compressor location on evidently older Cadillacs. I do my best to stay current, but I am like a walking service manual spanning over 20 years. sorry for the inconvenience.

Monroes are a good shock and when it comes to suspension, everything is better than factory installed. If you need other suspension parts, check out Moog as well.

Glad it worked out for you.

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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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