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Cadillac Repair/my 1998 cadillac deville

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Expert: - 2/3/2009


Question
I just bought a 1998 cadillac deville and it is nice .It is just when i hit a speed of
55 MPH the car start to shack as if the tires or something is bad .I no that the
strurs are bad but i don't no .  what could it be?

Answer
Hi warren,

This is a very general question that can have many answers, but I will try to assist.

The first thought that comes to mind is, bent or damaged wheel, bad tire, flat spots on a front tire from being out of balance, missing wheel weight, or front suspension problems.


The front end needs to be inspected first. Are ball joints, idler arm (if so equipped) tie rods all tight?
The tires and wheels must be inspected and balanced.
Balancing will commonly reveal a problem with the tire or wheel.

The problem could be as simmple as getting thetires balanced.

Good luck!

Rob

Cadillac Repair

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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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