Trailblazer shuts down and goes into security lock it just started 3 days ago out of the blue the lock threw the car symbol comes on then all electrical systems shut down steering wheel locks gear shifter locks break pedals lock guages blink on and offthe security system is disarmed from the information center in the instriment cluster

Engine light on. Security light comes on for a couple seconds then goes off when try to start ? You need to hook up a professional grade scan tool an do full vehicle scan ,all the modules on the vehicle . PCM - engine computer , BCM -body control module etc...

If you "trick" the starter, and turn key to start at same time ? How do you trick the starter ? jump the B+ terminal to S terminal on the starter solenoid or jump pins 30 & 87 at the starter relay ?
I can't afford to take it to dealer.? don't take it to a dealer , have mobile tech. come to you . Because you have not the knowledge to be messing with it.

check fuses relays and battery --lights going on is not an indication of battery being good --test battery with a meter or try boosting but your problem more than likely is key or ignition switch check --your key if worn or have chip key and chip/battery fail truck will not start if you have the other key try that one or try the relearn for the passlock system the link has information on how to do it
http://forums.trailvoy.com/showthread.php?t=69908

Hello Narisol,


Excerpt from the 2003 Owners Manual.


Passlock

Your vehicle is equipped with the Passlock theft-deterrent
system. Passlock is a passive theft-deterrent system.
Passlock enables fuel if the ignition lock cylinder is turned with a valid key. If a correct key is not used or the ignition lock cylinder
is tampered with, the fuel system is disabled and the vehicle
will not start. During normal operation, he SECURITY light
will turn off approximately five seconds after the key is turned to
RUN. If the engine stalls and the SECURITY light flashes,
wait about 10 minutes until the light stops flashing before trying
to restart the engine. Remember to release the key from START as
soon as the engine starts. If the engine does not start after
three tries, the vehicle needs service. If the engine is running and the
SECURITY light comes on, you will be able to restart the engine
if you turn the engine off. However, your Passlock system is not
working properly and must be serviced by your dealer. Your vehicle is not protected by Passlock at this time. You may also want to
check the fuse. See Fuses and Circuit Breakers on page 5-85.
See your dealer for service. In an emergency, call the M
Roadside Assistance Center. See Roadside Assistance Program on
page 7-5.


Excerpt from the 2003 Owners Manual.

Testing the Alarm The alarm can be tested by following these steps:
1.
From inside the vehicle, Iower the driver's window and open
the driver's door.
2.
Activate the system by locking the doors with the power door
lock switch while the door is open, or with the remote keyless entry transmitter.
3.
Get out of the vehicle, close the door and wait for the SECURITY light to go out.
4.
Then reach in through the window, unlock the door with the manual
door lock and open the door. This should set off the alarm. When
the alarm is set the power door unlock switch is not operational.
If the alarm does not sound when it should but the headlamps flash, check to see if the horn works. The horn fuse may be blown. To
replace the fuse, see Fuses and Circuit Breakers on page 5-85.
If the alarm does not sound or the headlamps do not flash, the
vehicle should be serviced by your dealer.

This may be the dreaded antitheft security system. Look for a picture on the dash when this happens that says SECURITY or a picture of a car with a lock through it. This 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, or not seen at all. When the communication breaks, the car misinterprets this as an attempt at theft and goes into antitheft mode. (like it thinks it's being hot wired) The car shuts down because it is not getting that signal from YOUR specific key. This is why the security light turns on and shuts down your vehicle. It will either turn off the starter, or the fuel injectors. The vehicle may run for 2-3 seconds before shutting down. This link explains it pretty well.
http://www.diy-gm-security.com/

High idle on start is normal, so no worries there

give me a example of a reemdem code

this just happened to my 03 trailblazer 3 days ago...now that its happened i also have lost control on my driver windows controls to a window and my sunroof. also my tail lights quite working.. but i still have brake lights..im wondering if its recall problem.. we took the trailblazer in to the repair shop today will find out the issue tmrw

strange never heard that before, if you have a spare, you can unlock the security by placing the key in the passengers door locking and unlocking it a couple of times, and doing the same thing on the drivers side, the reason why i say to do it to both sides is because the sensor could be in either door. as far as the key being stuck, are you sure its in park.

This mornnig when i tray to start my trailblazer 2006 LT sudnly eletiric power cuted and there is now light,now engen start ,the key can not poled out please rocomand me

The door sensor needs adjusting. It may be loose.
Loosen the lock nut on the pushbutton sensor in the door frame.
Unscrew the sensor a little and re-tighten the lock nut.