Radio/alternator whine and backup camera

Habnixzuverliern · January 26, 2015

hi,

i need help. my 2007 Tahoe came with a factory bose radio, i replaced the radio with a navi Bose radio and installed a backup camera and install the additional wiring for vss and onstar module. After the installation of the wiring for the onstar(vcim) module i hear a alternator whine in the radio, i cant get rid of this whine, it is horrible! so i checked all cable but i cant find any error, if i removed the wire from the vcim no whine but also no voice commands. so i installed the old radio which is working fine, but has no display........ So i need help.

i also thought about an alternativ, which is install the backup came in the inside mirror, so i would install a mirror out of a 2010 isch tahoe or chevy with the drc rpo. but i found out that this mirror has no temp gauge, so the other question is can i reprogram the cluster to display the outside temp? i have access to a tech2.

so i need help to find a way to get rid of the whine or reprogram the dic to display the temp.

i hope someone could help me.

Cheers.

Pierre

harolgrant · January 27, 2015

Sounds to me like all you have is a ground issue. Try making sure everything you installed is grounded good. Good luck

mviinc · January 28, 2015

I’ve heard of this before. There may be a service document on the issue, but if I remember correctly…it boiled down to a bad ground from within the radio. You may try taking Pin#4 from the VCIM connection straight to ground and see what happens (eliminate it from the radio side).

’ve heard of this before. There may be a service document on the issue, but if I remember correctly…it boiled down to a bad ground from within the radio. You may try taking Pin#4 from the VCIM connection straight to ground and see what happens (eliminate it from the radio side).