Richard, The OnStar did in fact use the old VP/GT boards. They are functionally and electrically identical. What MIGHT cause a problem is that these units might have a different software load. The original "GT" receivers did not have NMEA capability. I don't know if these old Onstar units ran binary only.
If there is a P/N sticker on the receiver, I can tell you what the receiver is capable of, unless the receiver has some sort of internal P/N. 1. If the P/N starts with "R1", the receiver speaks binary only. The R1xxxNxxxx series are "GT" receivers. 2. If the P/N starts with "R3", (R3xxxGxxxx for instance) the receivers are "GT+" and should speak both binary and NMEA. 3. A secondary way to tell if your board speaks NMEA is to look at the software revision. If the revision is below "2.2" the board is binary only. As I've mentioned before, the easiest way to figure out what you have is to download Rick Hambly's TAC32 program at: www.cnssys.com. TAC32 will figure out how to talk to just about any Motorola receiver ever made without operator intervention. It cycles through all of the various communications protocols automatically and tells you what the receiver is. Randy Warner -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Richard Hall Sent: Friday, May 16, 2008 2:39 PM To: [email protected] Subject: [time-nuts] GPS receiver in GM 2001 OnStar?? Found the location In my 2001 Buick Park Avenue the GPS and Analog cell phone are in the trunk behind the passenger side seat. I removed the unit and the GPS board looks like a Motorola Oncore VP/UT+/GT and there also was an antenna that looks like a, "Motorola Antenna 97 GPS antenna", Motorola part number is GCNAC1232A. With GM's analog OnStar no longer supported, this may be a low cost auto salvage item. Can some one confirm that GM used a board with the same pin outs of the Motorola Oncore VP/UT+/GT. With no previous GPS board experience, I do not want to damage this board by being wrong on the power connections. Thanks Richard Hall WB4RSO _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
