Another update: New iPhone 4 out of box works perfectly. USB port allows full music play, full Nav display playlist/artist/etc. navigation, power to iPhone. iPhone still reports the accessory error but it doesn't seem to have any issue. iPhone 4 is running OS4.2.
Unplug iPhone 4 and...
Same issue
Just bought 2010 Yukon Denali. iPhone OS 4.01 worked fine for playback and power through USB. Upgraded iPhone to OS 4.1 and now the 'unsupported accessory' message comes up on iPhone and music will play for about 10 seconds before cutting out. Nav display still shows iPhone info but...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.