2001 Chevy Silverado stalls

rvankleeck · January 4, 2007

Hi I recently purchased a 2001 Chevy Silverado 1500 2wd w/5.3L, and some times when I drive it will stall and I see the security light blink 3 times when this happens. When I restart the truck it starts right up without a problem but if I don’t keep taping the gas it will stall, but if the truck stalls and I put it in park and remove the key and put it back in, it starts right up and stays running. I have had one situation where the truck had stalled and I couldn’t restart it for 30min, it would crank but not start, like it was just out of gas. I just went to Auto Zone to have an engine diagnostic but there was 0 codes on the computer, so I am lost and any info would be appreciated.

Thanks

Ryan

rjirvine · January 4, 2007

Here's some info, not sure if it relates to your problem....

VEHICLE/POWERTRAIN CONTROL MODULE

The VCM/PCM communicates with the BCM over the Class 2 serial data line. When the BCM determines a no start condition, it sends a Class 2 serial data password to the VCM/PCM in order to disable the fuel injection system. If the BCM receives the expected voltage from the Passlock sensor, the BCM sends a class 2 serial data password to the VCM/PCM in order to enable the fuel injection system. The VCM/PCM then allows the vehicle to start correctly. If the Class 2 serial data password from the BCM to the VCM/PCM is not within the Vehicle Security Status Message, the fuel injectors will shut OFF during a start attempt. The SECURITY telltale will be illuminated for 10 minutes . If the VCM/PCM does not receive the same password from the BCM as the last learned one, the vehicle will start and then stalls due to the Fuel Lockout.

FUEL LOCKOUT CYCLE

The Passlock system has a lockout cycle of approximately 10 minutes . Once the vehicle is in the lockout cycle, the vehicle remains in the lockout cycle for 10 minutes, even if the ignition switch is turned from the RUN position to the OFF position. The Passlock system uses the lockout cycle in order to synchronize all of the Passlock components when any Passlock related part is changed. The Passlock system requires 3 consecutive lockout cycles in order to complete the 30 minute learn procedure for a changed component.

CHANGING THE PASSLOCK COMPONENTS

The design of the Passlock system is to prevent theft even if the various theft deterrent parts change. The parts that can no longer be changed without the possibility of going into a tamper mode are:

The Passlock sensor

The BCM

The VCM/PCM

If you replace any of these parts the vehicle may start and stall for 10 minutes . This is the long tamper mode. If this occurs, the system must go through a long tamper mode cycle. During this time the SECURITY telltale will be flashing for the full 10 minutes and the DTC B3031 will be set. The BCM and the VCM/PCM require the full 10 minutes in order to complete a learn cycle. The ignition switch must remain in the RUN position until the SECURITY telltale stops flashing. You will need to repeat the cycle if the ignition switch does not remain in the RUN position. When replacing any of the above parts it is recommended to perform one of the following procedures:

Seed and Key Procedure (10 minutes ). Refer to PASSLOCK Reprogramming Seed and key

Auto Learn Procedure (30 minutes ). Refer to PASSLOCK Reprogramming Auto Learn.

Here's the auto learn:

Passlock Reprogramming Auto Learn

PROGRAMMING REPLACEMENT PASSLOCK SENSOR, BCM, OR PCM

IMPORTANT:

The body control module (BCM) must be programmed with the proper RPO configurations before performing learn procedures. See BCM Programming/RPO Configuration.

If replacing the BCM with a GM Service Parts Operations (SPO) replacement part, the module will learn passlock sensor data code immediately. The existing PCM however, must learn the new fuel continue password when the BCM is replaced.

If replacing a PCM with a GM Service Parts Operations (SPO) replacement part, after programming, these modules will learn the incoming fuel continue password immediately upon receipt of a password message. Once a password message is received, and a password is learned, a learn procedure must be performed to change this password again. A PCM which has been previously installed in another vehicle will have learned the other vehicle's fuel continue password and will require a learn procedure after programming to learn the current vehicle's password.

Use this procedure after replacing:

Passlock Sensor

BCM

PCM

30 Minute Re-Learn Procedure

1 Turn ON the ignition, with the engine OFF.

2 Attempt to start the engine, then release the key to ON (vehicle will not start).

3 Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF.

4 Turn OFF the ignition, and wait 5 seconds .

Repeat steps 1 through 4 two more times for a total of 3 cycles/30 minutes (the vehicle is now ready to relearn the Passlock Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK). IMPORTANT: The vehicle learns the Passlock Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.

Start the engine (the vehicle has now learned the Passlock Sensor Data Code and/or password).

With a scan tool, clear any DTCs if needed (history DTCs will self clear after 100 ignition cycles).

rvankleeck · January 5, 2007

I went ahead and tried the relearn procedure just to see if it will do anything, but i dont know if it will work because my security light is not on(Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF.) I had two other people say it could be my fuel pump,p cam or crank sensor, what do you think.

Here's some info, not sure if it relates to your problem....

VEHICLE/POWERTRAIN CONTROL MODULE

The VCM/PCM communicates with the BCM over the Class 2 serial data line. When the BCM determines a no start condition, it sends a Class 2 serial data password to the VCM/PCM in order to disable the fuel injection system. If the BCM receives the expected voltage from the Passlock sensor, the BCM sends a class 2 serial data password to the VCM/PCM in order to enable the fuel injection system. The VCM/PCM then allows the vehicle to start correctly. If the Class 2 serial data password from the BCM to the VCM/PCM is not within the Vehicle Security Status Message, the fuel injectors will shut OFF during a start attempt. The SECURITY telltale will be illuminated for 10 minutes . If the VCM/PCM does not receive the same password from the BCM as the last learned one, the vehicle will start and then stalls due to the Fuel Lockout.

FUEL LOCKOUT CYCLE

The Passlock system has a lockout cycle of approximately 10 minutes . Once the vehicle is in the lockout cycle, the vehicle remains in the lockout cycle for 10 minutes, even if the ignition switch is turned from the RUN position to the OFF position. The Passlock system uses the lockout cycle in order to synchronize all of the Passlock components when any Passlock related part is changed. The Passlock system requires 3 consecutive lockout cycles in order to complete the 30 minute learn procedure for a changed component.

CHANGING THE PASSLOCK COMPONENTS

The design of the Passlock system is to prevent theft even if the various theft deterrent parts change. The parts that can no longer be changed without the possibility of going into a tamper mode are:

The Passlock sensor

The BCM

The VCM/PCM

If you replace any of these parts the vehicle may start and stall for 10 minutes . This is the long tamper mode. If this occurs, the system must go through a long tamper mode cycle. During this time the SECURITY telltale will be flashing for the full 10 minutes and the DTC B3031 will be set. The BCM and the VCM/PCM require the full 10 minutes in order to complete a learn cycle. The ignition switch must remain in the RUN position until the SECURITY telltale stops flashing. You will need to repeat the cycle if the ignition switch does not remain in the RUN position. When replacing any of the above parts it is recommended to perform one of the following procedures:

Seed and Key Procedure (10 minutes ). Refer to PASSLOCK Reprogramming Seed and key

Auto Learn Procedure (30 minutes ). Refer to PASSLOCK Reprogramming Auto Learn.

Here's the auto learn:

Passlock Reprogramming Auto Learn

PROGRAMMING REPLACEMENT PASSLOCK SENSOR, BCM, OR PCM

IMPORTANT:

The body control module (BCM) must be programmed with the proper RPO configurations before performing learn procedures. See BCM Programming/RPO Configuration.

If replacing the BCM with a GM Service Parts Operations (SPO) replacement part, the module will learn passlock sensor data code immediately. The existing PCM however, must learn the new fuel continue password when the BCM is replaced.

If replacing a PCM with a GM Service Parts Operations (SPO) replacement part, after programming, these modules will learn the incoming fuel continue password immediately upon receipt of a password message. Once a password message is received, and a password is learned, a learn procedure must be performed to change this password again. A PCM which has been previously installed in another vehicle will have learned the other vehicle's fuel continue password and will require a learn procedure after programming to learn the current vehicle's password.

Use this procedure after replacing:

Passlock Sensor

BCM

PCM

30 Minute Re-Learn Procedure

1 Turn ON the ignition, with the engine OFF.

2 Attempt to start the engine, then release the key to ON (vehicle will not start).

3 Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF.

4 Turn OFF the ignition, and wait 5 seconds .

Repeat steps 1 through 4 two more times for a total of 3 cycles/30 minutes (the vehicle is now ready to relearn the Passlock Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK). IMPORTANT: The vehicle learns the Passlock Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.

Start the engine (the vehicle has now learned the Passlock Sensor Data Code and/or password).

With a scan tool, clear any DTCs if needed (history DTCs will self clear after 100 ignition cycles).

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rjirvine · January 5, 2007

there is a TSB about crappy connectors for the security system, get a fuel pressure gauge and see whats up with the pressure from your pump. they are relatively cheap...

rvankleeck · January 6, 2007

What does TSP mean and what do i do with that info.

there is a TSB about crappy connectors for the security system, get a fuel pressure gauge and see whats up with the pressure from your pump. they are relatively cheap...

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99silveradoz71 · January 6, 2007

A TSB is a technical service bulletin. It's basically issued by GM when they become aware of a common problem and develop a set of procedures for techs to follow to remedy the issue.

rvankleeck · January 6, 2007

Well my vechile will not start , in my messange center box The battery, low fuel and security is blinking, and my fuel gage is not working. Well atleast now if i take into a shop they can troublshoot it instead of driving around and hoping it will stall.

Because i dont have a good idea what to do, because im thinking its a security issue on this truck.

rvankleeck · January 9, 2007

ok somebody tell me if this sounds correct. Today i finally just took the truck to the dealer, i told them every little detailed, they had call me back today and said its a bad fuel pump, and i said to him, why is my fuel gage not working when my truck doesnt start. The only time it doesnt start is when the fuel gage isnt working, and he said that its actually the fuel pump module that is going bad adn it does control both.

So i dont really believe him but i do not have $1000 to just replace the fuel pump and the fuel filter to proove him wrong. I now owe him 86 dollars for what think i is not my problem, but maybe im wrong maybe it does control both, but i was told different.

IxBrycenxI · May 8, 2007

I am dealing with the exact same problem. My uncle is my mechanic and he tested everything, the fuel pump relay, the fuel pressure, and the connectors. It is a faulty fuel pump. My gauge was doing the same thing for about a year and about a week ago my truck started stalling and starving for gas periodically and just 3 days ago my truck died and has no fuel pressure. The module cost $350 with or without the EVAP and should include a new sensor which will eliminate the gauge problem. The tank is pretty easy to get out and to change the fuel module if you are handy with tools. Otherwise a shop will charge you about 3hrs labor at about $65/hour

jaba · May 9, 2007

If you have not bought the pump yet try ebay. I bought mine for $120 new in the box from ac delco. Mine was for a 2000 silverado it was a mu1089. It included the pump and the sending unit. The sender was bad on mine.