• Turn the key off for thirty (30) seconds, press the ‘Y’ button,
and unplug the programmer cable from the DLC under the
dash panel.
• Start the engine and make sure the Service Engine Soon light
on your instrument cluster goes out (If it stays on or flashes,
Call Hypertech at 901-382-8888). Warm up the engine and
make sure it is running smoothly.
• FOR ONSTAR EQUIPPED VEHICLES.
For 4.8/5.3/6.0/8.1L
vehicles, reinstall the OnStar fuse(s) back into the fuse
panel(s), making sure the proper amperage fuse is in each
location and the fuse panel cover(s) are reinstalled. For
4.3L vehicles, plug the OnStar connector back to the
original location and reinstall the interior cover.
(See Section 1 for details.)
•
CHECK FOR DETONATION
. Whether you have selected
Power Tuning for premium (the highest octane rating
available in your area) or regular octane gasoline, you need to
check for detonation. This is a “pinging” sound heard during
heavy throttle acceleration, indicating the presence of
detonation. Make certain you are using gasoline intended
for the Power Tuning you have installed. If any “pinging”
sound is heard, you should immediately back off the throttle.
To discuss, call Hypertech at 901-385-1888.
SECTION 4: PROGRAMMING BACK TO STOCK
OR CHANGING OPTIONS
After installing Hypertech Power Tuning, you may return your
vehicle’s computer to stock programming at any time. Follow
these steps to return your vehicle to the stock tuning or change
your option settings.
• Reconnect the programmer to the DLC. Next, turn the ignition
key to run but do not start the engine. Press the
▲
arrow and
wait for the programmer to identify your vehicle just as before.
Since the programmer has programmed your vehicle’s computer,
this screen will appear:
• Then this screen will appear:
• Press ‘Y’ to return to the original factory program.
• Press ‘N’ to allow you to see the options in Section 3.
HYPERTECH POWER
TUNING INSTALLED
TO RETURN VEHICLE TO FACTORY SETTINGS, PRESS Y
TO ACCESS POWER PROGRAMMER FEATURES, PRESS N
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