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I just got a new VCM Suite this week. I was tuning with the Old School serial setup for about 10 years. First thing I discovered is that I cannot write to the VCM unless I pull the power fuse to the radio under the hood. Its a new Kenwood. What can I do to avoid this? Very annoyed right now.
New vehicle---2005 Colorado with an I5 and auto trans.
Nothing you can do, its always been like this with colorado's/Canyon's going back to 2006 when I did my first tune on one.
I've never had that problem on my 05 with my Alpine HU or my stock junk cd player.
I tuned one and had a similar issue with an aftermarket deck- don't recall the brand. His was an 06 or 07, and was 'professionally' installed.
I think it has something to do with the wiring harness/adapter used. FWIW, I also don't have OnStar.
I don't have OnStar either, but its a drag having to pull the Radio fuse in order to write to the VCM. I can scan with power to the stereo, but I can't Write. FUN FUN!
Nothing you can do, its generally been like this with colorado's backpedaling to 2006..