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Old 01-30-2014, 08:40 PM   #5
clinebarger
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Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
Re: 6L80 transmission whine at shut-off

Quote:
Originally Posted by 67Steven View Post
I do not have access to one of those readers, but I guess I can try to locate a mechanic with one to try that out.

As far as wiring, it is the original harness, and nothing was changed at the transmission, so I am going to speculate that it is okay. I am just worried I will need to replace the solenoid pack/TCM unit.
The TCM is staying "Awake" for some reason, Most likely a wiring error,
There is a Pink Ignition Hot wire at the Trans plug, This wire should only have power with the key on.

Don't replace the TCM!!!!
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