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No reverse code P0562 in ecm and tcm all ignition switch…

No reverse code P0562...

No reverse code P0562 in ecm and tcm all ignition switch feed are good scanner show 0 voltage ign1

Mechanic's Assistant: Has the car been stalling out?

No but acks like injector misfire once in a while.

Mechanic's Assistant: What is the make/model/year of your car?

2004 chevy duramax lly engine

Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far?

Checked all ignition wire feeds 12.7 volts.

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

All gear show change in scanner when shifting

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Answered in 19 minutes by:
3/9/2018
Gm Tech Cam
Gm Tech Cam, Service Technician
Category: Transmissions
Satisfied Customers: 30,418
Experience: 11 years experience, specializing in Trans, Elec and Dmax
Verified

Hello there, I am Cam.

I am Licensed technician at a GM dealership with more than 16 years experience. 
Like you, I am a user of this website and as such, any billing questions should be sent to customer service.

I ask that you please provide details and communicate with me so we can make your experience here worth 5 stars! I am around most days but not every minute of every day. If you reply while I am offline, I will respond when I am next online. 

I am reviewing your request and will post in a moment.

Can you confirm that you get ignition voltage as read with the scanner is greater than 10V in the transmission module?

If so then this is a faulty transmission module. IT is common enough for these to fail with age and use.
This module will require programming to operate. The programming is done using a system we call SPS or service programming system. This system is software launched through the GM site that connects our computer or scanner to the Gm programming server to load the latest software into the module and set it up. As a dealer employee I automatically have access to this. There are some aftermarket shops that can do this, which I have no clue. You will have to ask them.

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Customer reply replied 5 months ago
checked voltage running tcm ignition voltage 12.7 in park, 8.9 in reverse, 9.0 in n, 11.9 in d. Red to white on ignition switch is showing 3.6 volt drop in gear. May be ignition switch is bad. I think I will try that first.

that is what I would do. Let me know what happens.

Gm Tech Cam
Gm Tech Cam, Service Technician
Category: Transmissions
Satisfied Customers: 30,418
Experience: 11 years experience, specializing in Trans, Elec and Dmax
Verified
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Category: Transmissions
Satisfied Customers: 30,418
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Experience: 11 years experience, specializing in Trans, Elec and Dmax

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