- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
The antitheft or lock picture/icon 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 misinterprets 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. This link explains it pretty well.
Sometimes the security system can shut off your starter. Other times, a new starter does not match up with the correct frequency of the security system and can cause a starter failure. Read up on this site. Check to see if the security light is on. http://vatspasslockpasskeysecurityhelp.yolasite.com/
What you will need to do is get the theft deterrent codes read.This will help in finding the problem.You will probably have a B 2960.The problem is usually the ignition lock cylinder.This reads the key and if it sees the correct code it allows fuel to the motor.What usually happens is the wires break from the ignition cylinder being turned on and off all the time.Hope this helps.Good luck.
If it was Running hot, It could be the Waterpump or the Thermostat. Take the Radiator Cap off and Start the Truck. You should see the Coolant Circulating through the Radiator, If not, The waterpump is Bad. Let Me Know! Please Rate my Solution, I need all the Help that I can Get! Thanks!
If this problem just started I would try to get a jump on it. It will be easier to track down if the light just started coming on. Otherwise other problems may come into play and the mechanic will need longer to sort them out. At around 70.00hr.Cheapest fix is to try and drop in a set of plugs. Good luck.