Just took a quick look found out something interesting:
http://www.onstar.com/us_english/jsp...odel_years.jsp
Previous Model Years2006 Vehicles Available with OnStar
The following vehicles are available with OnStar. Starred (*) vehicles are not equipped for Hands-Free Calling and Virtual Advisor services. Please note that OnStar is limited to specific models and equipment packages on the vehicles listed.
Acura®
Acura 3.5RL - 2002, 2003, 2004, 2005
Acura 3.2TL - 2003
Acura 3.2CL - 2003
Acura MDX - 2005
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Audi®
A4® - 2003
A6® - 2003
A8® - 2003, 2004, 2005
Allroad Quattro - 2003
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Isuzu®
Ascender® - 2003, 2004, 2005
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Subaru®
Outback H6-3.0 Sedan - 2003, 2004
Outback VDC Sedan - 2003, 2004
Outback L.L. Bean Edition - 2003, 2004
Outback H6-3.0 VDC Wagon - 2003, 2004
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Volkswagen®
New Beetle® - 2004, 2005 (except New Beetle convertible)
Golf® - 2004, 2005
GTI® - 2004, 2005
Jetta® - 2004, 2005
Jetta Wagon® - 2004, 2005
Passat® - 2004, 2005
Passat Wagon - 2004, 2005
Phaeton - 2005
Touareg - 2005
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I had no idea that VW was also using onstar
it does appear that only GM is using ONStar for model year 2007 vehicles and that in 2006 only Acura and Isuzu seem to be using Onstar in their cars
and yes, the ls7 is the engine holding GM back