User's Manual

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OBD-II Diagnostic port locations
Preparing Vehicle for
Performance Tune Installation
• Apply parking brake to de-activate daytime running lights.
• Always have all the doors closed while installing
the DiabloSport Performance tune, and keep them
closed until the process is complete.
• Do not activate any electrical accessories while installing
the DiabloSport Performance tune. Ensure that there are
no electronic devices wired or plugged into the vehicle
that can cause a substantial voltage drop when activated
during installation of the DiabloSport Performance tune.
Please contact DiabloSport dealer if uncertain about devices
that are on your vehicle.
• Certain cellular phones or radio equipment might also cause
interference, please remove or turn such devices off.
• Do not try to install tune on a vehicle with a low battery voltage,
charge your battery if necessary.
• Unless instructed, never turn the ignition key OFF while
the Predator is plugged in diagnostic port.
• Do not unplug the Predator while it is installing
the DiabloSport performance tune.
Preparing Vehicle for DiabloSport Performance Tune Installation
2001-03 Duramax
Driver side underneath dash,
left hand side above
parking brake.