Any GM Techs

chevelless502 · March 4, 2005

I have a 99 New body style gmc sierra ex cab 4x4. Well the doors lock as soon as you take off then you have to unlock them after you stop. It is a real pain. Well i did some checking and have found that the 2000 and newer trucks there is ways to change this. I posted this on another borad and someone there said the computer could be reflashed so it didnt do this. My brother in law has a shop and he has a "Modus", ( i think thats the correct term anyway). that he uses to scan vehiicles for problems and he can also make setting with it. What I am wondering is there anyone here that knows if he can set my doors so they wont lock and unlock except by my control.?

ANother question is how if at all can the automatic headlights be bpassed so if i am setting someplace i can shut off the lights totaly or even just run the park lights.

Thanks

Andy

71GMC_3/4T · March 4, 2005

I'm pretty sure you can do this on your truck with a sequence of pressing the door unlock or lock button while you turn the key. I don't know the exact procedure, but it should be in your owner's manual.

I've heard they took this ability to adjust out of the more recent trucks, but yours should be able to change.

Good Luck!

silverado man · March 5, 2005

On 99's and early 2000's they wouldn't let you change the doorlock function. I ended up getting a R&D Accessories kit for the door locks and the 4 headlight mod. But sorry to say they are not in bussiness anymore. I'm not sure of any other company that does this. As far as your auto headlights do a search you'll come up with a few different ideas to put a switch in.

GM-Tech · March 6, 2005

If I recall correctly, in the 99, this could only be shut off through programming the BCM. There was a TSB on this and GM would cover the change one time under warranty. If the customer wanted it turned back on at a later date, it would be at their expense.

Okay, here ya go. I found the TSB...

Info - Disabling Automatic (Rolling) Door Lock Feature #99-08-64-003A - (Sep 27, 1999)

1999-2000 Chevrolet and GMC C/K Models (Silverado and Sierra)

This bulletin is being revised to update model year information, add service procedure information and change warranty information. Please discard Corporate Bulletin Number 99-08-64-003 (Section 08--Body and Accessories).

Some owners of the above vehicles may want to have the Automatic (Rolling) Door Lock feature disabled (turned off).

You can disable the Automatic (Rolling) Door Lock feature by either recalibrating the Body Control Module (BCM) or with the self-- programmable function. Use the following procedures:

MY 1999 (VIN X)

Important

The feature may be turned off and covered under warranty on a one-time only basis. The system can be re-enabled (turned on) again at customer expense.

Connect the Tech 2 to the vehicle.

Select Service Programming from the Tech 2 main menu screen.

Identify the vehicle (year, type, fuel system).

Select Request Information (left soft key).

Select Reprogram Existing Module. Verify the Vehicle Identification Number (VIN).

Disconnect the Tech 2 from the vehicle.

Connect the Tech 2 to the Techline Terminal. Follow the terminal instructions.

Select Service Programming System from the main menu.

Select Terminal to Tech 2 as the programming method.

Select Program Truck Body Controller.

Select Calibration with Automatic Door Lock Functionality Disabled.

When the action is complete, disconnect the Tech 2 from the terminal.

Connect the Tech 2 to the vehicle again.

Select Service Programming from the Tech 2. Complete the vehicle ID.

Select the Program soft key (second from the left). When the Programming Successful screen appears, press the Exit key.

Disconnect the Tech 2.

Road test the vehicle in order to confirm that the recalibration was successful.

----------------------------

MY 2000 (VIN Y)

Important

Reprogramming this function for customer preference is not warranty. Please instruct the customers to refer to their Owner's Manual operator instructions or refer to below instructions.

Beginning with the ignition in OFF position, pull back on the turn signal/multifunction lever all the way toward you and hold it while you perform the next step.

Turn your key to ON and OFF twice. Then with the key in OFF position, release the turn signal/multifunction lever. Once you do this, you will hear the lock switch lock and unlock.

You are now ready to program the automatic door locks. Once you release the turn signal/multifunction lever you will have ten seconds to begin programming. If you exceed the ten second limit the locks will automatically lock and unlock to indicate that you have left the program mode. If this occurs, to continue programming your locks go back to step 1 above.

The following is a list of the available programming options:

All doors lock at 24 km/h (15 mph), only driver's door unlocks when key is removed: Press the LOCK side of the power lock switch on the door panel ONCE, and then the UNLOCK side ONCE.

All doors lock at 24 km/h (15 mph), all doors unlock when key is removed: Press the LOCK side of the power lock switch on the door panel ONCE, and then the UNLOCK side TWICE. (This is the factory setting)

All doors lock at 24 km/h (15 mph), none of the doors unlock when key is removed: Press the LOCK side of the power lock switch on the door panel ONCE, and then the UNLOCK side THREE TIMES.

No doors lock at 24 km/h (15 mph), none of the doors unlock when key is removed (Turns off automatic lock feature): Press the LOCK side of the power lock switch on the door panel TWICE.

You can exit the program mode any time by turning the ignition to ON. The locks will automatically lock and unlock to indicate you are leaving the program mode. If the lock/unlock switches are not pressed while in the programming mode, the respective auto lock/unlock setting will not be modified.

Warranty Information

For vehicles repaired under warranty, use the following information:

Labor Operation

Description

Labor Time

N8510

(MY 1999 Only)

BCM - Reprogramming (On-Vehicle)

0.3 hr

This is a unique labor operation number for use only with this bulletin. This number will not be published in the Labor Time Guide.

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION

chevelless502 · March 6, 2005

Thank you VERY much for the help. I will hope to get that done tomorrow if I can.

Andy

If I recall correctly, in the 99, this could only be shut off through programming the BCM. There was a TSB on this and GM would cover the change one time under warranty. If the customer wanted it turned back on at a later date, it would be at their expense.

Okay, here ya go. I found the TSB...

Info - Disabling Automatic (Rolling) Door Lock Feature #99-08-64-003A - (Sep 27, 1999)

1999-2000 Chevrolet and GMC C/K Models (Silverado and Sierra)

This bulletin is being revised to update model year information, add service procedure information and change warranty information. Please discard Corporate Bulletin Number 99-08-64-003 (Section 08--Body and Accessories).

Some owners of the above vehicles may want to have the Automatic (Rolling) Door Lock feature disabled (turned off).

You can disable the Automatic (Rolling) Door Lock feature by either recalibrating the Body Control Module (BCM) or with the self-- programmable function. Use the following procedures:

MY 1999 (VIN X)

Important

The feature may be turned off and covered under warranty on a one-time only basis. The system can be re-enabled (turned on) again at customer expense.

Connect the Tech 2 to the vehicle.

Select Service Programming from the Tech 2 main menu screen.

Identify the vehicle (year, type, fuel system).

Select Request Information (left soft key).

Select Reprogram Existing Module. Verify the Vehicle Identification Number (VIN).

Disconnect the Tech 2 from the vehicle.

Connect the Tech 2 to the Techline Terminal. Follow the terminal instructions.

Select Service Programming System from the main menu.

Select Terminal to Tech 2 as the programming method.

Select Program Truck Body Controller.

Select Calibration with Automatic Door Lock Functionality Disabled.

When the action is complete, disconnect the Tech 2 from the terminal.

Connect the Tech 2 to the vehicle again.

Select Service Programming from the Tech 2. Complete the vehicle ID.

Select the Program soft key (second from the left). When the Programming Successful screen appears, press the Exit key.

Disconnect the Tech 2.

Road test the vehicle in order to confirm that the recalibration was successful.

----------------------------

MY 2000 (VIN Y)

Important

Reprogramming this function for customer preference is not warranty. Please instruct the customers to refer to their Owner's Manual operator instructions or refer to below instructions.

Beginning with the ignition in OFF position, pull back on the turn signal/multifunction lever all the way toward you and hold it while you perform the next step.

Turn your key to ON and OFF twice. Then with the key in OFF position, release the turn signal/multifunction lever. Once you do this, you will hear the lock switch lock and unlock.

You are now ready to program the automatic door locks. Once you release the turn signal/multifunction lever you will have ten seconds to begin programming. If you exceed the ten second limit the locks will automatically lock and unlock to indicate that you have left the program mode. If this occurs, to continue programming your locks go back to step 1 above.

The following is a list of the available programming options:

All doors lock at 24 km/h (15 mph), only driver's door unlocks when key is removed: Press the LOCK side of the power lock switch on the door panel ONCE, and then the UNLOCK side ONCE.

All doors lock at 24 km/h (15 mph), all doors unlock when key is removed: Press the LOCK side of the power lock switch on the door panel ONCE, and then the UNLOCK side TWICE. (This is the factory setting)

All doors lock at 24 km/h (15 mph), none of the doors unlock when key is removed: Press the LOCK side of the power lock switch on the door panel ONCE, and then the UNLOCK side THREE TIMES.

No doors lock at 24 km/h (15 mph), none of the doors unlock when key is removed (Turns off automatic lock feature): Press the LOCK side of the power lock switch on the door panel TWICE.

You can exit the program mode any time by turning the ignition to ON. The locks will automatically lock and unlock to indicate you are leaving the program mode. If the lock/unlock switches are not pressed while in the programming mode, the respective auto lock/unlock setting will not be modified.

Warranty Information

For vehicles repaired under warranty, use the following information:

Labor Operation

Description

Labor Time

N8510

(MY 1999 Only)

BCM - Reprogramming (On-Vehicle)

0.3 hr

This is a unique labor operation number for use only with this bulletin. This number will not be published in the Labor Time Guide.

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION

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