What is the color of the wire by the ignition for the fuel anable

There is no way in heII you can do anything with this, take it to a qualified repair shop an have it fixed right . There is no way you could send a class 2 data message to the PCM.

The theft deterrent system has been incorporated into the body control module (BCM). The theft deterrent is provided in order to prevent the vehicle operation if the correct key is not used in order to start the vehicle. The ignition key turns the lock cylinder. The cylinder rotation produces an analog voltage code in the Passlock™ sensor. This voltage code is received by the BCM. The BCM compares the voltage code to the previously learned voltage code. If the codes match, a class 2 message is sent from the BCM to the powertrain control module (PCM)/vehicle control module (VCM). The message enables the fuel injectors.

Having the vehicle checked for codes should have been the first thing done . Security light on ,a code is stored in the control module that controls the anti-theft system ! This is if you want it fixed right !
Important: If the wrong ignition key is used in an attempt to start the vehicle, a Data Trouble Code (DTC) will be set and the Body Control Module (BCM) will not send a fuel enable or starter enable message to the Powertrain Control Module (PCM) for three minutes even if the correct ignition is used.
The Pass-Key II® Theft Deterrent system prevents vehicle theft by disabling the starter motor and fuel system. If the Body Control Module (BCM) dose not identify the use of the correct ignition key to start the vehicle, the (BCM) will communicate a message to the Powertrain Control Module (PCM) which will disable the crank relay and fuel delivery to the engine.
When the (BCM) identifies the use of the correct ignition key (resistor pellet) to start the vehicle, the (BCM) will send a fuel enable and starter enable message to the (PCM) which will allow the vehicle to start.

DTC B2957 Security System Sensor Data Circuit Low
DTC B2958 Security System Sensor Data Circuit High
DTC B2960 Sec Sys Sensor Data Incorrect but Valid
DTC B3031 Security System Controller in Learn Mode
DTC B3094 No Response from ECM/PCM Received

or you can do a by pass that may or may not work ! You could measure the resistance of the pellet on the side of the key , then go to radio shack a by a resistor of the same value ! Then find the wires under the dash that come from the ignition switch ! Solder the resistor into the harness side wires , not going back to ignition switch . The wires break or contacts inside ignition switch do . You could check resistance with ohm meter . Put key into the ignition switch , find those wires i said about before . Check resistance at the wires under dash , is it the same resistance as pellet ?

The oem pass key system reads the key and compares that to what the computer is expecting. If it matches the fuel pump is permitted to run and the car starts. The fuel pump wiring goes from the computer to the pump. The oem pass key is usually built in...the sensor is in the ignition lock but the actual "brain" is in the computer.

You have two choices ! 1 is take to auto repair shop an have it fixed the correct way . 2 do an anti-theft system by pass , which may not be the problem . These systems do have a problem with the wires breaking at the lock cylinder . When you stick the key into the ignition lock there are two contacts inside that touch the resistor pellet .The resistance of the pellet is read by the BCM ,if correct the vehicle starts , if not the BCM sends a disable signal to the PCM - engine computer to disable the fuel injectors . That's what is happening on your vehicle , starts for a couple of seconds an dies. Fuel injectors are being shut off .

The personal automotive security system (PASS-Key?®) system is designed to prevent the engine from starting if the proper resistance is not sensed from the ignition key. Of the 15 different key codes or resistance values available, only one will work with each body control module (BCM). Once the key code is programmed into the BCM, the resistance value is stored in a non-volatile memory.
The PASS-Key?® system prevents the engine from starting by controlling the starter relay and the powertrain control module (PCM) fuel enable input. If the PCM does not sense the proper frequency signal on the fuel enable input, fuel will not be provided to the engine.
If the wrong resistance value is sensed when the ignition switch is in the RUN position, the BCM will not ground the starter enable circuit and will not output the fuel enable signal for approximately three minutes. The engine is prevented from starting and discourages a thief from trying key codes or resistance values at random.
If the correct resistance value is sensed when the ignition switch is in the RUN position, the BCM will ground the starter enable circuit and output the fuel enable signal. The engine will start normally.
If the PASS-Key?® system detects an open or short to ground when the ignition switch is in the RUN position, the BCM will default to fail enable. Fail enable occurs when the proper key resistance is sensed before the open short to ground occurs. This has to occur for 1 minute before the fail enable is engaged. Fail enable will illuminate the security indicator lamp and allow the operator to stop and start the vehicle until the problem is corrected.
You can test to see what the resistance is with an ohm meter across the pellet on the key . An then find the wires coming out of lock cylinder an see if you read same resistance ,with key in the ignition cylinder . If you do the wires are ok , if not then you can do the by pass . Go to radio shack an buy a resistor of same value an solder it in between the wires of the harness side , not ignition side . But ,if the wires are good an you can read the resistance value ,then you have other problem an need to have Trouble codes checked .

Error Code: P0301
Description:
Cylinder 1 - Misfire Detected
Possible Cause:
Wiring.
Ignition system.
Fuel injectors.
Fuel pressure.
Running out of fuel.
EVAP canister purge valve.
Evaporative emission system.
Low compression.
Base engine problems.
Engine control module (ECM).

Error Code: P0302
Description:
Cylinder 2 - Misfire Detected
Possible Cause:
Wiring.
Ignition system.
Fuel injectors.
Fuel pressure.
Running out of fuel.
EVAP canister purge valve.
Evaporative emission system.
Low compression.
Base engine problems.
Engine control module (ECM).

Error Code: P1300
Description: Random Misfire
Possible Cause:
As above.

Have it checked for DTC'S - diagnostic trouble code's . I suspect the problem is with the tdm module or the ignition switch ???? Assuming will only get you into trouble . If the PCM - engine computer does not see the right coded meassage from the TDM it won't turn on the fuel injectors or it will cut them off in two seconds . .
Buick Security Systems 1998 Chevy is the same .
Ignition Key With Wrong Resistor Pellet Code is Used To Start Engine
The theft deterrent module performs one of the two following actions when you attempt to start the vehicle with a wrong ignition key:
• There are 15 PASS-Key® II resistance ranges. The PASS-Key® II resistance may be one of the 14 valid but incorrect PASS-Key® II resistance ranges. The theft deterrent module will perform the following actions when you attempt to start the vehicle (if the condition is present during an engine start attempt or for 1 second any time after the engine has started):
• Turns on the SECURITY indicator
• Sends a password to the PCM through the fuel enable signal circuit
• The password disables fuel delivery to the engine.
• Disables the theft deterrent relay, which disables the starter circuit
• Disables sampling of the PASS-Key® II resistance for 3 minutes
• The 3 minute time period is called the shut-down period.
• Disconnecting the battery will not clear the timer sequence. The timer sequence will resume when battery power is restored.
• Inserting the proper key during the vehicle shut-down period will not start the engine. The engine will not start until the shut-down period has elapsed.
• After the shut-down period, the engine will start if the correct ignition key resistor pellet is used.
• The PASS-Key® II resistance may be correct and allow the engine to start. Later during the same ignition cycle, the PASS-Key® II resistance may be one of the 14 valid but incorrect resistance ranges. The theft deterrent module will perform the following actions:
• Enters the fail-enable mode
• Turns ON the SECURITY indicator
• Sends a password to the PCM through the fuel enable signal circuit when more attempts to start the engine occur
• The password allows the fuel enable circuit to deliver fuel to the engine.
• Enables the theft deterrent relay, which also enables the starter circuit.

Ignition Key With Correct Resistor Pellet Code is Used To Start Engine
The theft deterrent module performs the following actions when the correct ignition key is used in order to start the vehicle:
• Enables the theft deterrent relay. The theft deterrent relay enables the starter unit.
• Sends a password to the Powertrain Control Module (PCM) through the fuel enable signal circuit. As a result, the PCM allows fuel delivery to the engine.


By pass theft system .
GM VATS Key Resistor Key Security Bypass

P0304 is Cylinder 4-misfire detected-probable cause is as follows. Engine mechanical fault, wiring, ignition/fuel system, injector, ECT/MAF sensor, ECM

P0316 Misfire detected during startup-first 1000 revolutions- probable cause is as follows-Engine mechanical fault, wiring, ignition/fuel system, injector

Does the security light flash or come on steady ? Have a lot of thing's on your key ring ? Other key's with transponder inside , Do you know what a transponder is ?

The Ignition Key (Transponder)
The ignition key for PASS-Key® III equipped vehicles is a typical ignition key using a transponder pellet located in the end of the key. The ignition key transponder value is used in order to determine if a valid ignition key is being used in order to start the vehicle. When the ignition key is inserted into the ignition cylinder and the PASS-Key® III module detects the ignition voltage (the ignition switch is in RUN or START) the module measures the transponder pellet value. The PASS-Key® III module validates this value and performs the following functions:
• If the ignition key transponder value is valid, the PASS-Key® III module performs the following (system enable) functions:
- The PASS-Key® III module sends a pulse width modulated signal to the PCM to request fuel enable.
- The PCM enables the fuel system.
- This function enables the engine to start.
• If the ignition key transponder value is invalid, the PASS-Key® performs the following (system disable) functions:
- The PASS-Key® III module does not send the fuel request signal to the PCM.
- The PCM does not enable the fuel system.
- This function does not enable the engine to start and run. The engine may start and then stall due to residual fuel in the fuel system.
The PASS-Key® III module can identify up to 10 valid key codes to operate the vehicle.

Having excess thing's on you ring , including other PASS-Key® III keys , can confuse the computers .