Im almost sure that my anti theft system is stopping my 1998 chevycaviler z24 from starting do i need to take it to a gm dealer

I don't think the anti-theft is the problem.
On GM vehicles, the anti-theft system will not allow the engine to crank, or get fuel or spark. If it cranks, you have a different problem.

Change fuel filter.

I had the same problem - My car would not start. There is a bypass button in your car that when you press and start the car at the same time the car will start. To find this button look just above the hood release lever or in that area there is the bypass button. I finally had to remove the anti-theft system and now my car starts fine. The dealer would not replace the anti-theft, but could remove it but the cost was way to high, so I went to place were they replace car radio and other similiar services and payed around $30.00 to have it remove. They also told me that I really did not need this system on my car, because you can't start the car without the key.

Hope this help.

These are dealer issues. They have to be reset at the dealer. You will need proof of ownership. GM theft lock radios are notorious for this also.

will the anti theft system stop your car from starting ? if so how do i rest it on a 1998 isuzu trooper

Thanks for choosing FixYa and welcome to the site. Did GM reset the anti theft system in your car? If it is going off, it will cause the car to not start.

how to get the anti-theif lightoff

my car won't start, the anti theft system is on,

the new key has to be programmed, is it a chip key? I don't think ACe has chip key for GM passkey security systems like what comes standard on your car.

go to this web site the keys are $21.50 each plus shipping or u can get one from the GM dealer.

if the vehicle starts then stops and the anti-theft light is flahing you may need to re-set the pass-key system to do this you will need to atempt to start the vehicle and when it stalls leave the key in that position and watch the anti-theft light. it should flash on and off for about 5 to 10 minutes. when it stops flahing turn the ignition to off then try to restart your vehicle