Bully Dog 40420 gauge GT tuner - Manual (Page 37)

GT
DIESEL
36
how to InstAll the tune
1. Complete the Pre-install steps
• Update GT using Update Agent (pages 20-27).
• Physical Installation (pages 28-31).
• Install tune preparations (pages 32-35).
2. Turn your key to the Run position. (DO NOT start the engine)
3. Go to the Main Menu
4. Choose Install Download
5. Follow the instructions on your GT screen, which will include the following steps:
• You will need to turn your key to different positions and then press Continue.
Do NOT start the engine when turning the key to the Run position, or at any other time when you are installing the tune.
• You may be prompted with choices for certain settings like the speed limiter. Many of these are vehicle specific.
See pages 17 and 18 for more information on these settings.
• If there is a problem or the GT displays an error message, do not change anything and contact technical support immediately.
See page 49 for more information about contacting technical support.
6. The GT will indicate when it is finished & then reboot to the Main Gauge Display
• Once the tuner has rebooted to the Main Gauge Display, you can start and use your vehicle like normal.
IMPORTANT NOTE: There are certain times when disconnecting or interrupting power to the GT can interfere with the engine computer programming process. If
the engine write is interrupted, the programming on your engine computer can be corrupted. This can cause your vehicle not to start and possibly even require the
ECM to be replaced. The illustration below is an example of one of the times during the installation when it is vital that the power is not disturbed.
Note: There may be times when our technical support team will instruct you to disconnect the tuner even though the screen tells you not to unplug.