You can buy a paper copy of the 2006 Vibe service manual from Helm, it's about $135 There is no Chilton's or Haynes manual for the VIbe that I have heard of, and those usually have inadequate wiring diagrams anyway (imho). There are various Matrix service manuals available on line,
http://forums.genvibe.com/zerothread?id=1156 has a link to the 03 matrix manual, I think matrixowners.com had a link to a more recent matrix service manual. For 2003/2004 the electrical stuff should be identical, or nearly so, between Vibe and Matrix, but I don't know how silimar they are for the 2006 model year, depends on the systemWas there a specific thing you are looking for?