How to ECU checksum for MPPS cable ?

MPPS V18 ECU Checksum Tutorial:

MPPS V18 features:

Excellent recovery functions. In some cases MPPS can recover ECU’s which others tools can not even make communications with.
On certain controllers it even works when with no program is present (a blank memory).
Selectable full / partial reading and writing when the ECU allows this function.
Selectable reading / writing speed.
Writing “changes only” function for faster programming (when supported by the ECU).
Auto detection of K-Line/CAN, and option to bypass and force preferred means of communication.
Temporary bypass of immobiliser to allow flashing on the bench on ME7 systems.
Boot mode support for ECU’s with C167 and ST10 processors.
EEprom read/write functions for some ECU’s are included.
VAG MEDC17 TPROT level checking without opening the ECU.

What is a checksum:

A checksum is a block of digital data that is used to verify the contents is of the memory is correct.  Upon modifying the data the correct checksum must be calculated to ensure proper operation of the Engine Control Unit (ECU).

What happens if I checksum a file that was already checksummed:

It will not cause a problem if a file is checksummed twice.  In most cases this will result in zero changes as the checksum is already made for the file.  Although in a very small number of instances the MPPS Checksum may be slightly different than a checksum calculated using a differnt method.  In This case it will also be ok to checksum the file a second time.

What you should know before MPPS checksum:

MPPS does not support Checksums in some cars models/ECUs , if it is not displayed under write option for your car model&ECU then the Checksum is not supported. If you cannot do it in WinOLSthat’s mean that checksum module is missing or not installed.
your best option is to compress your original file and modified file into RAR archive if you can and post this file on this forum . someone should check it for you.

remember when you will write your modified file into ECU make sure you have battery fully charged or better connect a battery charger if you can and observe voltage is above 12v in LHS corner in your MPPS software if you don’t have a charger,
do not open doors just wait couple of minutes till MPPS will finish write cycle, take time and do what software instruct you to do regarding ignition.
How to use MPPS cable for checksum:

Select the correct ECU TYPE

Press the checksum button

Select the modified file that you wish to checksum

mpps_checksum_1

Select the ORIGINAL FILE IF PROMPED

mpps_checksum_2

Select the file name to save the checksummed file to

mpps_checksum_3

You now have a checkummed file that you can WRITE to the ECU.

Have fun!

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How to Used GM Tech2 scanner disable Corvette C5 F55

So here I would like to share my experience disabling F55 and reflashing DBS using GM Tech2 scan tool

GM TECH2 Features:

1) GM software in the Tech 2 Flash means the most comprehensive diagnostic software available for late model GM vehicles.
2) Support for on-board diagnostics on all GM systems 1992 thru current year.
3) Removable hardware modules provide insurance against scan tool obsolescence.
4) Large, easy-to-read backlit screen.
5) RS232 & RS485 ports provide the avenue to connect future devices to your Tech 2 Flash.
6) Ability to capture stored DTCs, Freeze Frame, and Failure Record for later review.
7) Ability to view the status of vehicle diagnostic tests as they run.
8) Bi-directional The authentic GM 1992-current year software will provide full bi-directional control when performing power train, chassis, and body diagnostics.

GM Tech 2 Specifications

1) Microprocessor: 32 bit,16 MHz
2) Memory: 32 MB flash type II PCMCIA. Type III slot available for future expansion.
3) Communications: Integral RS232 communication port.
4) Screen: 3.8.8 backlit monochrome with full graphics capability: 320,40 pixels. Displays up to 9 vehicle parameters at once .Download Tech2 Brochure (5.2 Mb)

An industry change in protocol from OBD II to Controller Area Network (CAN) has begun. In order to perform diagnostics on a vehicle that uses the CAN interface; You will need the Tech 2 Flash and a CAN diagnostic interface module. The module connects between the Tech 2 Flashs diagnostic link cable and the OBD adapter. Once the module is connected, it can be used on all GM vehicle applications,even those vehicles using other platforms such as OBD I and OBD II.

Disclaimer: Please strictly follow the steps in case anything goes wrong. The F55 disabling and DBS reflashing are on your own risk.

First I had the tech do the DBS reflash for me in about 10 min. My tune was NOT affected and the car started and ran normally.

I then had him disable the F55 suspension. Again, my tune was NOT affected and the car started and ran normally.

It is also worth noting that HP Tuners can NOT make changes to the BCM.

If you are looking to disable your F55 using the TECH2 scanner:

1. Hook up Tech 2, turn car ON, make sure module in the rear is PLUGGED IN. Do Not unplug the rear module.
2. Go to diagnostics — Body — BCM — BCM Special functions — BCM Setup.
3. Delete the F45 option ( F55 did not appear on the menu screen on the Tech 2, use F45)
F55 did not appear on the menu screen on the Tech 2, use F45
4. Save new configuration.
5. Do not turn car off, do not remove Tech 2, go to the module in the rear of the car, unplug the grey connector( the widest one) leave the center plug in and the smaller black plug in.
6. Turn off car leave Tech 2 plugged in.
7. Remove remaining plugs from module in the rear of car.
8. Turn car on to verify the “Max speed 80 mph” is gone.
9. Unplug Tech2 and put tools away.

Then you have to follow the bouncing ball of checking off RPO Codes. When you get to F55 set it to disabled.

http://www.fobdii.com/wholesale-2-gm-tech2-in-carton-package.html

install and update VPECKER E4 Tablet Diagnostic Tool?

VPECKER E4 Tablet Client software upgrade to 5.0 version:

1, Optimize UI display.

2, Fix some bugs.

3, Improve diagnostic capabilities and communication layer stability.

4, New model software update reminder.

5, Optimization of diagnostic data flow interface interaction.

6, New freeze data stream refresh function.

7, Add history reminder for diagnostic menu click.

Vpecer E4 Car Diagnostic Tool Features

1. Extensive vehicle coverage for more than 70 US domestic, European, Asian, Australian and Chinese vehicles makes.
2. Complete function capability including live data, ECU programming and somany others.
3. Unparalleled OBDII functionalities-support ALL 5 OBDII protocols and ALL10 test modes.
4. Wi-Fi internet capability allows for wireless access throughout the workshop.
5. Can check out the year and model of the vehicles automatically and quickly.
6. Hardware architecture uses a new design with multiple protection,interference and stability. Built-in overvoltage protection module is applied,in order to protect scanner and vehicle against accidental damage duringchecking.
7. Can work stably in high and low temperature environment, and work well.
8. Extremely easy-to-use with touch-screen operation and intuitive operationin the windows.

Vpecer E4 Systems Coverage

ME-Motor electronics, CDI-Common Rail Diesel Injection, ETC-Electronic transmission control, ESM-Electronic selector module, SBC – Sensotronic Brake Control, ESP-Electronic stability program, BAS-Brake assist, Suspension, TPC-Tire pressure monitor, Airbag, CGW-Central gateway, EIS-Electronic ignition switch, OCP-Overhead control panel, UCP-Upper control panel, XALWA-Xenon headlamp, HRA-Headlamp range control, ATA-Anti-theft alarm system, IC-Instrument cluster, ASSYST-Active Service System, SCM-Steering column module, EPS-Electrical power steering, PTS – Parktronic system, EPB-Electric parking brake, COMAND/AUDIO, CD/DVD, TV tuner, CTEL-Cellular telephone, DCM-Door control module, ESA driver-Electric seat adjustment driver, ESA passenger-Electric seat adjustment passenger, AAC-Air conditioning, WSS-Weight sensor system, SVMCM-Special vehicle multifunction control module, etc.

Then you are supposed to upgrade VPECKER E4 Tablet, here you can go to install in 3 steps.

Steps:

1, Please click Settings-OS Version in the main interface of VPECKER E4.

2, Please clickvpecker0e4-tablet-upgrade-and-installation-001

vpecker0e4-tablet-upgrade-and-installation-001

vpecker0e4-tablet-upgrade-and-installation-02

Please wait for the upgrade package to download. After complete, the tablet will

automatically start VPECKER E4 installation interface, please follow the guide to

install.

 

3, Please click “Install”.

vpecker0e4-tablet-upgrade-and-installation-03

vpecker0e4-tablet-upgrade-and-installation-04

Note: After installation, please log in IDUTEX Store to re-download all car software.

http://www.fobdii.com

How To Solution VVDI Key Tool Renault Logan Sniff Data

Renault Logan ID46 HITAG2 key sniff data solution on Xhorse VVDI key tool key copy machine.

XHORSE VVDI Key Tool Remote Maker English language

Xhorse VVDI Key Tool Auto Key Programmer supports most common remote types in the market; it is reliable and easy to use. VVDI key tool can perform these functions:
edit transponder, clone transponder, test frequency, clone Remote, generate remote, generate garage door remote controller, unlock smart card etc. In a word, Xhorse VVDI Key Tool remote generator is a device with multi-functions.

Insert original key into left coil

Select Transponder Clone-> ID46 HITAG2->Use wireless remote for sniff data

vvdi-key-tool-renault-1

vvdi-key-tool-renault-2

vvdi-key-tool-renault-3

Insert VVDI wireless remote key into left coil

vvdi-key-tool-renault-4

Close original and wireless remote, insert original key into ignition to sniff data

vvdi-key-tool-renault-5

Install battery and put acquisition remote near vehicle ignition coil, switch on ignition 1 time when put remote back to the VVDI Key Tool induction coil, press OK to read data

vvdi-key-tool-renault-6

Insert original key into left coil and press OK to start the calculation. Don’t move the key during the progress.

vvdi-key-tool-renault-7

vvdi-key-tool-renault-8

Calculation success

Take out the car key and insert TPX3 or SN2 wireless key then press OK to clone the transponder.

vvdi-key-tool-renault-9

Clone success. Press OK to clone next.

vvdi-key-tool-renault-10

vvdi-key-tool-renault-11

vvdi-key-tool-renault-12

vvdi-key-tool-renault-13

vvdi-key-tool-renault-14

Done.

http://www.fobdii.com

How To Programs New Keys to VW MQB NEC35XX by Xhorse VVDI2

How to: VVDI2 MQB key programming

You need new and original MQB keys

You also need a VVDI2 VAG Xhorse

(vvdi2 is the only one key programmer supports MQB instrument)

Note that MQB function is FREE to get with VVDI2 Copy 48 Transponder (96 bit) Function Authorization Service

vvdi2-vag-mqb-immobilizer

In detail…

 

Insert the working key and ignition on

Connect VVDI2 Auto Key Programmer  to the car and the laptop

Run VVDI2 VW software

vvdi2-vag-mqb-nec35xx-key-program-1

vvdi2-vag-mqb-nec35xx-key-program-2

Connecting to the device (VVDI2)

vvdi2-vag-mqb-nec35xx-key-program-3

Diag

vvdi2-vag-mqb-nec35xx-key-program-4

Read EEPROM or FLASH

vvdi2-vag-mqb-nec35xx-key-program-5

vvdi2-vag-mqb-nec35xx-key-program-6

vvdi2-vag-mqb-nec35xx-key-program-7

vvdi2-vag-mqb-nec35xx-key-program-8

vvdi2-vag-mqb-nec35xx-key-program-9

Reading data success

Save data

vvdi2-vag-mqb-nec35xx-key-program-10

Read immo data

vvdi2-vag-mqb-nec35xx-key-program-12

Reading immo data success

Save data

vvdi2-vag-mqb-nec35xx-key-program-13

vvdi2-vag-mqb-nec35xx-key-program-14

Make dealer key

vvdi2-vag-mqb-nec35xx-key-program-15

vvdi2-vag-mqb-nec35xx-key-program-16

vvdi2-vag-mqb-nec35xx-key-program-17

vvdi2-vag-mqb-nec35xx-key-program-18

vvdi2-vag-mqb-nec35xx-key-program-19

Input the new key into VVDI2 key programmer

vvdi2-vag-mqb-nec35xx-key-program-20

Prepare dealer key success

vvdi2-vag-mqb-nec35xx-key-program-21

vvdi2-vag-mqb-nec35xx-key-program-22

Reset instrument

vvdi2-vag-mqb-nec35xx-key-program-23

vvdi2-vag-mqb-nec35xx-key-program-24

Add key with immo.bin

vvdi2-vag-mqb-nec35xx-key-program-25

vvdi2-vag-mqb-nec35xx-key-program-26

vvdi2-vag-mqb-nec35xx-key-program-27

vvdi2-vag-mqb-nec35xx-key-program-28

vvdi2-vag-mqb-nec35xx-key-program-29

vvdi2-vag-mqb-nec35xx-key-program-30

All keys are successfully learned

vvdi2-vag-mqb-nec35xx-key-program-31

Test the key and it’s working.

vvdi2-vag-mqb-nec35xx-key-program-32

vvdi2-vag-mqb-nec35xx-key-program-33

vvdi2-vag-mqb-nec35xx-key-program-34

Job’s done!

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What can I do Chevrolet C5 by GM Tech2 ?

This is a write-up for those with a GM Tech 2 scan tool on Chevrolet C5

GM Tech2 scanner Features:

Tech2 Diagnostic Scan Tool For GM SAAB OPEL SUZUKI Holden ISUZU With 32 MB Card And TIS2000 Software Carton Package

1) GM software in the Tech 2 Flash means the most comprehensive diagnostic software available for late model GM vehicles.
2) Support for on-board diagnostics on all GM systems 1992 thru current year.
3) Removable hardware modules provide insurance against scan tool obsolescence.
4) Large, easy-to-read backlit screen.
5) RS232 & RS485 ports provide the avenue to connect future devices to your Tech 2 Flash.
6) Ability to capture stored DTCs, Freeze Frame, and Failure Record for later review.
7) Ability to view the status of vehicle diagnostic tests as they run.
8) Bi-directional The authentic GM 1992-current year software will provide full bi-directional control when performing power train, chassis, and body diagnostics.

Vetronix Tech 2 Specifications

1) Microprocessor: 32 bit,16 MHz
2) Memory: 32 MB flash type II PCMCIA. Type III slot available for future expansion.
3) Communications: Integral RS232 communication port.
4) Screen: 3.8.8 backlit monochrome with full graphics capability: 320,40 pixels. Displays up to 9 vehicle parameters at once .Download Tech2 Brochure (5.2 Mb)

An industry change in protocol from OBD II to Controller Area Network (CAN) has begun. In order to perform diagnostics on a vehicle that uses the CAN interface; You will need the Tech 2 Flash and a CAN diagnostic interface module. The module connects between the Tech 2 Flashs diagnostic link cable and the OBD adapter. Once the module is connected, it can be used on all GM vehicle applications,even those vehicles using other platforms such as OBD I and OBD II.

Tech 2 scanner is a diagnostic tool for the most part. It can be used to program out/in certain RPO’s in the BCM and can be used to bleed the ABS brake system without introducing air into the system. The extent to which it can be used to tune a Chevrolet C5 is that if you have a PCM Image that will work for your car you can save the current PCM Image and flash the new one you have onto the PCM. It cannot go in and individually change the tuning tables in the PCM as can say either EFI Live or HP Tuners tuning tools. But then those tools cannot touch the BCM either.

If you do or plan to do a lot of diagnostic work on your car it can be a worthwhile tool. Most of the diagnostic charts in the factory service manual assume the availability of a Tech 2. But you have to learn to use the tool like any other computerized diagnostic tool. It has layers and layers of menus to wade through. But in certain diagnostic situations it can be an invaluable tool because it allows you to turn on and off hundreds of computerized settings to aid in the diagnosis process.

GM intentionally dumbed down the capabilities of the GM Tech2 to change things to avoid law suits due to an errant technician that changed engine or emissions settings that could result in engine damage or emissions violations.

GM Tech2, the bi-directional scan tool can access all the 10 computers in the c5 corvette. That means it can scan for DTC codes, allow the adding or removing of most accessory codes like turning off the mag ride shocks to install regular schocks, fixing window regulator problems, etc. For Bi-directional it can active the ABS system to flush the brake fluid, reset the Long Term Fuel Trims, eliminate the 1-4 shift on manual trans, etc. It cannot make changes (like a tune tool) to the transmission or engine management system. For the avid DIY’er it is a great tool.
In the C5, the “computers” (technically they are modules) and they communicate over the OBDII compatible DLC data bus to each other. The range from you radio to your ride control, to your HVAC system. Even the Bose head unit talks to the PCM and BCM through this bus, but the CD changer talks over a “private” data bus to the head unit.

The Sensor Modules that can be pulled up from the DIC are:
PCM, BCM, TCS, RTD, IPC, HVAC, LDCM, RDCM, SCM, RFA, and SDM.
Only those C5’s with RPO F45 or F55 will have RTD.

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How to do self test RS232 cable by GM Tech2 scanner

If you need to run TIS2000 software on PC, you have to connect GM Tech2 scanner using the RS232 cable with the DB9 Adapter to a serial COM Port at the PC. If you cannot get the Tech 2 scan tool connect to PC or fail to communication well, the best way is to connect the RS232-DB9 adapter correctly and then run a RS232 self test.

GM TECH 2 Features:

1) GM software in the Tech 2 Flash means the most comprehensive diagnostic software available for late model GM vehicles.
2) Support for on-board diagnostics on all GM systems 1992 thru current year.
3) Removable hardware modules provide insurance against scan tool obsolescence.
4) Large, easy-to-read backlit screen.
5) RS232 & RS485 ports provide the avenue to connect future devices to your Tech 2 Flash.
6) Ability to capture stored DTCs, Freeze Frame, and Failure Record for later review.
7) Ability to view the status of vehicle diagnostic tests as they run.
8) Bi-directional The authentic GM 1992-current year software will provide full bi-directional control when performing power train, chassis, and body diagnostics.

GM Tech2 gm diagnostic scanner comes with several connectors, including a RS232 cable and RS232-DB9 adapter (mark red circle below)
Tech2 RS232 Adapter
1) Follow the cable pinout to connect the cable correctly
Tech2 DB9-JR45 RS232 cable adapter pinout
Pinout RJ45 to DB9 cable
Tech2 RS232 Adapter

BD-9 to RJ45
1——-2
2——-4
3——–5
4——–8
5——–7
6——–1
7——–3
8——–6
9——–not connected

2) Then do a RS232 cable self test

How to do Tech 2 RS232 self test?

1. Power up the Tech2. Connect RS232 cable with Tech II scanner main unit.
Tech II scanner main unit
2. Come to main menu. Select F4:Tool Options
GM Tech2 scanner RS232 cable self test
3. Select F3: Self Test
GM Tech2 scanner RS232 cable self test
4. Follow the system prompts:
Before running the Tech 2 self test:
CANdi interface must not be connected
ALDL loopback should be connected
Failure to follow these instructions may invalidate the self test
Press EXIT to continue
GM Tech2 scanner RS232 cable self test
5. Select F3: Selectable main PCB
GM Tech2 scanner RS232 cable self test
6. Select F2:RS232 LoopBack
GM Tech2 scanner RS232 cable self test
7. Tech2 RS232 cable self test has passed
GM Tech2 scanner RS232 cable self test
If RS232 cable passes self test, the commutation between Tech2 scanner and PC is well built.

http://www.fobdii.com

Download Free GM Tech2 TIS2000 Tech2Win

GM Tech2 TIS2000 Tech2Win full software for PC/laptop:

Tested version:

TIS200 software and USB key:

Tech 2 32mb card full software:

http://www.fobdii.com/wholesale-3-32mb-card-for-gm-tech2.html

GM TECH2 Scan Tool Features:

1) GM software in the Tech 2 Flash means the most comprehensive diagnostic software available for late model GM vehicles.
2) Support for on-board diagnostics on all GM systems 1992 thru current year.
3) Removable hardware modules provide insurance against scan tool obsolescence.
4) Large, easy-to-read backlit screen.
5) RS232 & RS485 ports provide the avenue to connect future devices to your Tech 2 Flash.
6) Ability to capture stored DTCs, Freeze Frame, and Failure Record for later review.
7) Ability to view the status of vehicle diagnostic tests as they run.
8) Bi-directional The authentic GM 1992-current year software will provide full bi-directional control when performing power train, chassis, and body diagnostics.

Software included:

GM
GM-English         V33.004 1991-2013
GM-Germany      32.002 1991-2013
GM-Spanish       31.006

OPEL
OPEL-English     2010 V180  1997-2014
OPEL-Italian       133.001 1997-2012
OPEL-Germany  85.001 1997-2008
OPEL-Spanish   91.001 1997-2009

SUZUKI
SUZUKI-English   01.210.020

SAAB
SAAB-English     148.000

ISUZU
ISUZU-English  107.021 2006-2010

Holden
HOLDEN-English  149.000 1999-2013

NOTE: software above from www.fobdii.com is tested 100% and confirmed to work perfect .
F
ree version:

GM Tech 2 all software:

https://1drv.ms/f/s!AuMFf5LIARiPhoFnuFd_w8WJBG9wQQ

Courtesy of dspargo

Files and software included:

Miscellaneous

Software

BIN files

Saab 135.bin

Saab 136.bin

Saab 143.bin

Saab 146.bin

Saab 148.bin

Saab 44.bin

GM NAO 33.004.bin

GM 32.008.bin

GlobalTIS

TIS2000

Tech 2 Card Writer

Memory Card Explorer

Tech 2 User Guides

WIS

EPC

VMware

http://www.fobdii.com/wholesale-2-gm-tech2-in-carton-package.html

 

How to used GM Tech2 scanner Unlock Chevy TrailBlazer radio

I have successfully unlocked the radio on my Chevy TrailBlazer with a clone GM Tech2 scan tool from China yesterday. Here I would like to share the procedure.
GM TECH2 Features:
Tech2 Diagnostic Scan Tool For GM SAAB OPEL SUZUKI Holden ISUZU With 32 MB Card And TIS2000 Software Carton Package

1) GM software in the GM Tech2 scanner Flash means the most comprehensive diagnostic software available for late model GM vehicles.
2) Support for on-board diagnostics on all GM systems 1992 thru current year.
3) Removable hardware modules provide insurance against scan tool obsolescence.
4) Large, easy-to-read backlit screen.
5) RS232 & RS485 ports provide the avenue to connect future devices to your Tech 2 Flash.
6) Ability to capture stored DTCs, Freeze Frame, and Failure Record for later review.
7) Ability to view the status of vehicle diagnostic tests as they run.
8) Bi-directional The authentic GM 1992-current year software will provide full bi-directional control when performing power train, chassis, and body diagnostics.
If you also like to unlock the radio, please complete the following procedure, using the Tech 2 scanner, in order to properly set up communication:

Connect Tech2 to the OBD port of the vehicle. When the screen of the tool illuminates, it means the tool hooks up with the car. Then you can start the process:

  1. Go to the main menu and select: Diagnostics.
  1. Select Vehicle Identification and then the following options:

– Model Year

– LD Trk, MPV, Incomplete

  1. At the System Selection Menu screen, select: Body
  1. At the Vehicle Identification screen, select the following:

– Appropriate model

– Appropriate Air Conditioning

– Navigation Radio

  1. Select: Navigation Radio.
  1. Select: Special Functions.
  1. Select: VIN Relearn.
  1. Then you will get a message: “Do you want to clear radio theft information?”
  1. To begin clearing, press the soft touch key on the top right of the scan tool. The scan tool will display “Clearing Radio Theft in Progress.”
  1. Press EXIT on the scan tool and cycle the ignition.

Done. Disconnect Tech2 from the car.

http://www.fobdii.com/wholesale-2-gm-tech2-in-carton-package.html

How to used GM Tech2 program Chevrolet Cobalt key fob

Equipment:
GM Tech 2 /GM Tech II scan tool

Vehicle model: Chevrolet cobalt
GM Tech2
gm tech2 candi connection

GM Tech2 Scanner Features:

1) Authentic GM software in the Tech 2 Flash means the most comprehensive diagnostic software available for late model GM vehicles.
2) Support for on-board diagnostics on all GM systems 1992 thru current year.
3) Removable hardware modules provide insurance against scan tool obsolescence.
4) Large, easy-to-read backlit screen.
5) RS232 & RS485 ports provide the avenue to connect future devices to your Tech 2 Flash.
6) Ability to capture stored DTCs, Freeze Frame, and Failure Record for later review.
7) Ability to view the status of vehicle diagnostic tests as they run.
8) Bi-directional The authentic GM 1992-current year software will provide full bi-directional control when performing power train, chassis, and body diagnostics.

NOTE:
GM Tech2 scan tool is able to program up to 4 transmitters. Do not operate or program the transmitters in the vicinity of other vehicles that are in the keyless entry program mode which will prevent the programming of the transmitters to the incorrect vehicle.

It is important to follow the transmitters programming order. The first transmitter programmed will be transmitter #1, and the second transmitter programmed will be transmitter #2. Be carefully to program the transmitters correctly. Do not disconnect GM Tech2 diagnostic scanner during the transmitters programming procedure.

1. Invalidate All

This procedure will erase all keyless entry transmitters from memory.

1) Install GM Tech2 Scanner tool
2) Turn ignition to ON with engine OFF
3) Come to the main function menu and select Body
4) Select Remote Control Door Lock Receiver (RCDLR)
5) Select Module Setup
6) Select Program Key Fobs
7) Select Invalidate All.
8) Follow the Tech2 system screen prompts

2. Available Slot

Incremental programming allows for a transmitter to be programmed into the next available location without affecting the currently programmed transmitters. Previously programmed transmitters will not be erased during this procedure.

NOTE:
If all 4 slots are programmed, the Ⅰ(Invalidate All) procedure will need to be performed to allow transmitter programming.

1) Install GM Tech2 scan tool
2) Turn ignition to ON with engine OFF
3) Come to the main function menu and select Body
4) Select Remote Control Door Lock Receiver (RCDLR)
5) Select Module Setup
6) Select Program Key Fobs
7) Select Next Available Slot
8) Follow the Tech2 system screen prompts
9) Disconnect the Tech2 scan tool
10) Exit the vehicle. Operate all functions on transmitters to verify correct system operation.

3. Transmitter Slot Programming

Transmitter slot programming allows a single transmitter to be programmed into a specific slot without affecting any of the other programmed transmitters. By using slot programming, the transmitter originally programmed to a specific slot is erased and the new transmitter learned in its placed.

1) Install GM Tech2 Scanner tool
2) Turn ignition to ON with engine OFF
3) Come to the main function menu and select Body
4) Select Remote Control Door Lock Receiver (RCDLR)
5) Select Module Setup
6) Select Program Key Fobs
7) Select the key fob desired to be programmed.
8) Follow the Tech2 system screen prompts
9) Disconnect the Tech2 scan tool
10) Exit the vehicle. Operate all functions on transmitters to verify correct system operation.

http://www.fobdii.com/wholesale-2-gm-tech2-in-carton-package.html