It is taking a basic Edge unit, reprogramming it, recasing it in some situations and sending it back with the improved canned tunes, other improved functions and the ability to accept custom tunes.
If you have a '97-'03 and a monochrome Edge you can't upgrade. PHP no longer upgrades those programmers because of a cable issue.
The CS and CTS, however, can still be used on those trucks.
You can upgrade at any time and put your order in line for custom tunes.
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