47
TUNING THE VEHICLE
6. The HDGT will display the Phase 3 initiation screen.
7. Press the top right button to Continue.
8. The HDGT will provide a list of available engine tunes.
Select the tune you prefer:
• Stock: Original factory power levels.
• Economy: 6-10% improved fuel mileage
(with good
driving habits)
.
• Power/Economy: 10-12% improvements in fuel mileage
(with
good driving habits)
plus approximately 10% gain in
engine power.
• Power Tune: 20% power improvement with no economy gains.
IMPORTANT NOTE:
After the tune is selected, do not unplug or disturb the HDGT. If the
process is interrupted, the engine computer may need to be recovered.
Continue
GT status: UNLOCKED
Phase 3:
GT is Ready to
Download to Truck
...Press Continue...
DOWNLOADING
SELECT TUNE
Power/Economy
Economy
Stock
UP
DOWN
SELECT
9. The HDGT will build the file.
• This process is fast; it should take a
minute or less.
• Do NOT interrupt the HDGT.
10. Verify that the key is in the RUN
(or ON) position.
• Press CONTINUE
(top right button)
.
11. The HDGT will write the calibration.
• Do NOT interrupt the HDGT .
12. Turn the key to the OFF position.
• Press Continue
(top right button)
.
13. The HDGT will finish the download.
• Leave the key in the OFF position.
• Do NOT interrupt the HDGT.
14. Turn the key to the RUN (or ON) position.
• Do NOT start the engine.
• Press Continue
(top right button)
.
BUILDING FILE
3%
Setting...
Power/Econ Tune
Please wait
Do Not Unplug
PLEASE VERIFY KEY
IS IN THE
KEY RUN
RUN
POSITION
PRESS CONTINUE TO PROCEED
Continue
Writing Calibration
0%
00
000000F0
00010000
0003FF32
000104B0
002004B0
000DD522
Please wait
Do Not Unplug
PLEASE VERIFY KEY
IS IN THE
KEY OFF
OFF
POSITION
PRESS CONTINUE TO PROCEED
Continue
Please Wait
Finishing Download
6
Seconds
Leave Key OFF!
DO NOT UNPLUG!!!
PLEASE VERIFY KEY
IS IN THE
KEY RUN
RUN
POSITION
PRESS CONTINUE TO PROCEED
Continue
