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Old 06-09-2019, 09:42 PM   #1
Johns58stepside
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Join Date: Oct 2015
Location: Tuttle Oklahoma
Posts: 22
6.2 4l65e wonít shift

Hey guys I have a question I have a 58 with a 6.2 and a 4l65e running factory fuel injection and a connect and cruise transmission trans part#19260380. Problem is range switch a b c and p all read hi and the trans commands 3rd gear at all times and will not shift. I have disconnected the connector at the trans and it has 12v ont the pink wire and ground on the black wire I can short out the black wire to each range a b c p and they read low. Trans still no shift. Does the range switch have anything to do with the no shift. Or am I fighting different issues? Any help or ideals would be greatly appreciated.
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Old 06-12-2019, 11:27 PM   #2
Slippy
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Join Date: Apr 2018
Location: Antler ND
Posts: 68
Re: 6.2 4l65e wonít shift

I believe there is a red/white wire that is 12 volt positive all the time and then the pink wire is hot with ecm on. I had issues with mine being stuck in limp mode and it was improper voltage on the red/white wire. Just something to look at
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Old 06-13-2019, 07:18 PM   #3
Johns58stepside
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Join Date: Oct 2015
Location: Tuttle Oklahoma
Posts: 22
Re: 6.2 4l65e wonít shift

Thanks for the response I did load test the powers and grounds to the Tcm and the transmission. They where good. I talked to gm performance and found out the the connect and cruise transmission is based on a 2006 gto transmission I wired my truck based on a Silverado or Tahoe so I got a pin out for a gto and going to try that route.
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