SOURCE: 05 GMC shows wrong temp. for out side temp. on
Ensure that your Outside Temp Sensor is in the correct place, installed near the radiator on the lower portion of the vehicle, under the hood.
Check/replace if broken or damaged.
SOURCE: 2002 gmc sierra won't start, security light came on
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.
This link may help you.
http://vatspasslockpasskeysecurityhelp.yolasite.com/
SOURCE: sunroof and courtesy light not working in 2002 dodge status RT coupe.
when things stop working I check fuses first.
wires usually have connectors on them so removing then replacing the connector would be a better fix. on/off not new connector
A wire may have become disconnected while working in the area.
They are probably under the headliner.
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