Follow up - The issue seems to be avoided if I wait for the truck GPS to connect to the alpine system before plugging in the phone. I live in a semi remote area and usually have to drive to the front of the neighborhood before the system announces “GPS connected.” When I connect my phone and CarPlay engages the phone switches over to the truck GPS without any issues.
On the other hand, if I plug in and initiate CarPlay before the GPS connects, the phone can’t switch correctly to the truck GPS.
I don’t know if this is a CarPlay bug or if it can be fixed, but either way I have a solution.
generrik
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Thank you. Did this and the feedback I got was that the GPS cable may be getting some interference from other electrical components. I’m going to have to have the installer take another look at this.