Brian,
I'm not at work and am going a bit on memory, I can check when I get in the office tomorrow to be certain. The thing to remember is the 430 and 530 have two types of software. There is Main and GPS software loads than can be accomplished. The main software I believe is 4.01 released in March of 2012 and GPS software version 3.2 released in May of 2009.
Jason Smith
Aerotronics Inc.
Experimental Division
My Garmin 430W would not display the LPV approach into M01. It would simply default to the LNAV approach. Funny thing was it worked fine with the LPV into KAWM. A discussion with tech support at Garmin revealed the solution to the problem. There was a service bulletin (1225A), but somehow I missed it. It turns out that some older units such as mine require a software update, because the older software causes an error with approaches into airports with three-letter identifiers such as M01. After upgrading from version 3.11 to version 5.0. the unit performs flawlessly, and the LPV approach is displayed just fine. If you have an older unit, an upgrade may be in order.