Here is the note from UHLTronices ----

Thank you for your inquiry regarding the Triad Telematics Interface System. We have just completed successful beta testing on the '02 Cadillac Escalade EXT. After successful beta testing on the '02 Avalanche and '02 Suburban, the intent is to re-design (IF NECESSARY) the Triad2 unit to accommodate other GM vehicles, including the H2. We'll keep this project updated in "Latest News" on our website.
Respectfully,
UHLTronics, LLC
Sandra & Jim Uhl