2006 Silverado tcm program failure

Gery Diagnostician Florida Posted   Latest   Edited  
Resolved
Programming
2006 Chevrolet Silverado 3500 LS 6.6L (2 LLY) 6-spd (1000)
Tcm Communication Failure

Hello fellow techs.

this is the second time this happens to me with the same year/model vehicle. I cannot communicate with the new tcm when I attempt to program it. If I connect the old tcm I communicate. I have attempted to program with mdi2 and tech2 pass-thru but failed at either attempt. Power ground and can lines all checked out OK this is the second vehicle this happens to me(same year and model). Correct part number was confirmed.

I have no idea on how to proceed.

any help would be appreciated. Thanks

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Interesting
Bruce Owner/Technician
Texas
Bruce
 

Is there any aftermarket alarm or radio? What about bench flashing it? Does the new one actually communicate with a scan tool? More specific information may help other users to understand what you mean can't communicate. What error do you get with SPS if any?

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Agree
Ralf Owner/Technician
Illinois
Ralf
 

I agree, try a bench flash or have someone else do it for you(on the bench that is).

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Paul Mechanic
Illinois
Paul
 

If this is the second time with same year/model, how did you overcome it the first time? I seem to remember not having communication with new tcm modules, in other words, it's normal. However, I was doing a 2016 Denali tcm for a trans shop about two years ago and was not getting any where, even called tech support and they confirmed I had programmed said vehicle. Told trans shop to get another…

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Gery Diagnostician
Florida
Gery
 

Thanks. May have to give it a shot. Tell them to get me a new one.

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Allan Owner
Virginia
Allan
 

Is it Dorman junk? I’d had issues with those. Otherwise I’d say wrong part

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Gery Diagnostician
Florida
Gery
 

Oem computer. Gonna confirm part number.

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Todd Diagnostician
Michigan
Todd
 

I think Paul has the right idea, but depends what you mean when you say not communicating. Are you trying to establish communication using a scan tool prior to programming, or are you actually going through the programming steps when the loss of communication occurs? If the latter, you should have an Exxxx code displayed on the PC. If that is the case, what is the error code?

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Gery Diagnostician
Florida
Gery
 

Thanks Todd. No communication with the tech 2 in diagnostics and here’s a pic of the error message during programming…

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Juan Technician
California
Juan
 

Before you start programming, ensure you can communicate with TCM with Tech2 or other scanner. If you can not communicate with scanner, you can not program it.

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Anthony Owner/Technician
California
Anthony
 

I programmed about control module Friday, had the same code. Check the cig lighter fuse. Mine was blown. After replacing it the acld connector had power so the interface would communicate with the module.

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Marty Owner/Technician
Texas
Marty
 

Gery, I had a problem with a BCM tried serval times to flash finally went to SI and read the procedure and found I Had to turn the key off and wait for 30 seconds after flashing. that was a 2007 Silverado.

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Kerry Mobile Technician
Ohio
Kerry
 

Gary, it wouldn't hurt to attempt to program a different module on the vehicle and see if it lets you go further….that will rule out any tooling or J2534 wrapper issues. If OK, then I agree with Bruce and others that if you can't comm with module via scanner , you have a bad tcm…..especially if using Tech2 or other non-battery powered scanner.

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Brandon Technician
New York
Brandon
 

Hi Gery, I had this exact error message when trying to program a liftgate control module this past Friday. When I called acdelco support I was instructed to right click on internet explorer and “run as administrator”. I was then told to tick off “reset j2534 tool” when SPS opened. Not sure if this will help your issue but it was what allowed me to successfully program.

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Timothy Owner/Technician
Wisconsin
Timothy
 

If you cannot communicate with it using a scanner, before programming, you cannot communicate with it to program it. I also agree with Kerry, that you could attempt to program another module on-board, and see if you can al least get to the programming steps/screen.

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Juan Technician
California
Juan
 

Are you using a windows 7 computer? If you it fails just before the J2534 wrapper chooses your interface (mdi, mdi2, etc) then try on a windows 10 computer. Run Explorer as adminstrator. I have 1 Windows 7 still working & 1 windows 7 machine not working anymore. Time to upgrade to Windows 10.

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Gery Diagnostician
Florida
Gery Resolution
 

I would like to thank everyone who took the time to reply. I made it out to the car today and figured it out. I’m not gonna lie, the problem was in the connector locking slides. One of the slides was jamming up and the connector wasn’t sitting all the way down on one side. What through me off was it happened to communicate with the old one when I connected it. It was one of those days when it’s…

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Thanks
Paul Mechanic
Illinois
Paul
 

There is no shame in admitting mistakes. By doing so, you will have undoubtedly help someone else from making it or at least make it on to a short list of possibilities that may have not been a consideration with out this example. Some of the best lessons I ever learned where my mistakes. I write them off as educational and move on.

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Timothy Owner/Technician
Wisconsin
Timothy
 

BTDT! Ugh! Just got called in on a Ford Escape, where the harness had been replaced because of an accident, (whole, new from Ford, engine harness), and after the harness replacement, the vehicle would not crank nor communicate with the PCM…the connector to the BJB was just not quite ‘home’. The tech had checked it a few times before I got there… Glad you got it.

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