Question about Buick Century
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Posted on Jan 02, 2017
The coolant level sensor is located on the radiator. If you are looking at the engine from the front of the car it will be on the left side. There will some kind of clip holding it in the radiator. Removed the clip and pull the sensor out. You will lose coolant so try to swap it out quick or drain some of the coolant out. Once new sensor is installed, install clip to keep the sensor in place and reconnect the wires to the sensor. Crank the engine and make sure the coolant level is full. This should correct your problem.
Posted on Jan 04, 2009
The security light is a visual indication that something in the car's antitheft system is failing. In most GM cars and trucks there is a hidden system that most people are unaware even exists. From the moment you put your key in the ignition, there begins a constant line of communication between your key's security chip or transponder, to the ignition's lock cylinder, and then to the car's TDM (Theft Deterrent Module). These 3 parts are in CONSTANT communication. If the key is in the ignition, then these parts are sending signals to each other. The security light illuminates when that signal gets broken, even just for a second. When the signal breaks, the car misinterperates this as an attempt at theft and goes into antitheft mode. The car thinks its being stolen or hotwired because it is not getting that signal from YOUR specific key. This is why the security light turns on and shuts down your vehicle. Remember too, the TDM controls the security light. Sometimes you can have ALL the symptoms and no lights.
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Posted on Aug 06, 2012
For future viewers of this post, check the harness in the lip of your trunk, it is held in by a retainer that was clipped together without leaving enough slack in the wires. They came this way from the factory, and it is an extremely common problem with late 90's - early 2000's Centuries. What happens is because there is not enough slack provided to the wires (which are being pushed and pulled everytime you open your trunk), and therefore some of the rubber coating tears wears off, most commonly on the thick brown wires and the ground. Check all wires in that area of the harness for corrosion.
Posted on Feb 20, 2013
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