Thread: 4l80e no upshift 1995
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Old 07-21-2015, 04:35 PM
Vanfan Vanfan is offline
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Re: 4l80e no upshift 1995
Did you wiggle the harness around and make sure it didn't drop? Pull the wire loom back and follow each wire up looking for rub marks or cuts. Check and clean all the grounds including the batteries.
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