AFTERMARKET GPS /STERIO SYSTEM LOOSING POWER
 

REGARDING 2003 HUMMER H2 ADVENTURE SERIES.

INSTALLED AN AFTER MARKET PIONEER AVIC2 INDASH NAVIGATION SYSTEM. HAD INSTALLED 2 YEARS AGO BY A SHOP. WAS WORKING FINE FOR ABOUT THE FIRST YEAR AND NOW WE ARE EXPERIENCEING THE SYSTEM SHUTTING DOWN WHILE DRIVING THE VEHICLE. WHEN SHUTTING DOWN YOU HEAR THE CHIME UNDER THE DASH, THIS HAPPENS WITHING SECONDS AND THEN POWERS BACK UP. THIS HAPPENS EVERYDAY, 2 TO 3 TIMES WHILE DRIVING. WE HAVE CHECKED WITH PIONEER TECH SUPPORT AND MENTIONED THE PROBLEM WITH THE CHIMES RINGING
AT POWER SHUT DOWN, THEIR EXPLAINED THAT IS NOT THE RADIO. THERE HAS TO BE A PROBLEM WITH A RELAY, ETC. WE ATTEMPTED TO HAVE THE IGNITION SWITCH CHANGED OUT TO VERIFY THAT IT WAS NOT THAT, THE DEALER CAN NOT EVEN FIGURE OUT THE PROBLEM, OR THE SHOP THAT INSTALLED THE UNIT. CAN ANYONE HELP...................

NOTE.. THE CAR CAME WITH A STOCK BOSE SYSTEM AND WHEN YOU INSTALL AN AFTER MARKET SYSTEM YOU HAVE TO INSTALL A SPECIAL MODUAL WITH IT. WE HAVE EVEN CHANGED THAT AND STILL THE PROBLEM OCCURS.

figure it out
 

Did you ever get this figured out? I am having the exact same problem.