Reflash used gm ecm/tcm

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  • jm43130
    Senior Member
    • Apr 2008
    • 182

    Reflash used gm ecm/tcm

    Just tried to reflash and change VIN in a used ECM for 2010 Malibu, and GM SPS wouldn't let me change VIN. I did notice SPS now calls it ECM/TCM flash sequence now. I did read on drewtech and it said GM will only allow a reflash to VIN in used ecm, but will let you write a VIN and mileage to a clean ecm. Has anyone ran into this. I used to rewrite VIN in used ECM's.
  • greasybob
    Senior Member
    • May 2008
    • 1590

    #2
    Was the flash successful ? Just the VIN that didn't change ?

    Comment

    • jm43130
      Senior Member
      • Apr 2008
      • 182

      #3
      It stopped with a box that said skip ecm, skip tcm, ok. When you click ok, it starts over. So i don't know. It wouldn't try to download at all. When I say reflash, I was only trying to change VIN. . The flash files were the same in both ECM's because customer had managed to find a exact duplicate ecm, but VINs were different.

      Comment

      • diesel71
        Senior Member
        • Feb 2008
        • 921

        #4
        I don't know this for sure, but don't you write the vin after the flash file has been downloaded?. if so maybe you could not skip and let it flash with the same file then be able to write the vin. not much help just a thought.

        Comment

        • greasybob
          Senior Member
          • May 2008
          • 1590

          #5
          With GM the VIN is usually rewritten as part of the flash. If you entered the correct VIN at the start of the vehicle identification process that is the VIN that will be in the ECM after the flash. If the correct software is already in the ECM a notification will come up saying "you are attempting to program with the same calibration, GM does not recommend this". Ignore this and do the flash and the VIN will change. Unless something has changed since I last installed a used ECM.

          Comment

          • jm43130
            Senior Member
            • Apr 2008
            • 182

            #6
            I think you will find it has changed. I never ran into a popup box that said " Skip Ecm, Skip Tcm" and only option was to click OKAY. Then SPS goes to section where it says "Cancel, Use same Vin, Use new Vin. " and wants to start over. I tried both options to "Replace and reprogram ecm: and also to just "reprogram Ecm. Both had same results. Customer ordered new ecm from dealer, I'll try it this afternoon. And I'll try some more with used ecm. Another thing Greasybob, it never popped up box that said you are attempting to reprogram with same code. I have seen that before and went right on passed that. This doesn't seem to be the same problem.

            Comment

            • Ruston11
              Member
              • Feb 2015
              • 40

              #7
              used module

              GM has put a stop to a lot of used modules, they have some sort of seed and key set up. I have a list around somewhere with the models affected. They allow you to program but the theft will have an error. I think by 2011 the entire line was included. i can get a copy of the documents if anyone needs. Hope this helps.....

              Comment

              • greasybob
                Senior Member
                • May 2008
                • 1590

                #8
                I don' think that a 2010 Malibu is a global platform vehicle. My list shows the Malibu joining that group in 2013. it sounds mor like the whole menu process has changed. I haven't flashed a GM in a month or so. I'll have to check it out later. I always save screen shots of what I'm doing when programming, that way if some thing changes or something new comes up I can review it later.

                Comment

                • jm43130
                  Senior Member
                  • Apr 2008
                  • 182

                  #9
                  Ruston11, I'd be interested in seeing that list, if you can find it. No 2010 Malibu is not global platform, you still use Tech2win to communicate. Also Tech2 can't be used to reflash after model year 2007.

                  Comment

                  • Ruston11
                    Member
                    • Feb 2015
                    • 40

                    #10
                    list

                    i found the list it is four pages i think. how would you like me to get it to you?
                    maybe i can text it to you? List shows what year they each model goes over to the new setup.LMK my number is 407 416 5397

                    Comment

                    • Witsend
                      Banned
                      • Nov 2012
                      • 2942

                      #11
                      By search of title on 1st page , Is it possible that the pages may already be view able from a web link that you can post for others ?

                      Comment

                      • greasybob
                        Senior Member
                        • May 2008
                        • 1590

                        #12
                        the list
                        Attached Files

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                        • greasybob
                          Senior Member
                          • May 2008
                          • 1590

                          #13
                          A link to the list of seed and key modules. http://www.sandyblogs.com/techlink/feb2010techlink.pdf

                          Comment

                          • abdiel
                            Junior Member
                            • Jul 2017
                            • 4

                            #14
                            Hi

                            Originally posted by Ruston11
                            i found the list it is four pages i think. how would you like me to get it to you?
                            maybe i can text it to you? List shows what year they each model goes over to the new setup.LMK my number is 407 416 5397
                            Hello, can you send me de lit please?? my email is abdielayala9@gmail.com

                            im noob about programing reprograming for j2534, and i want to know about ramplece ecu with the same no. serial. Thank you !!

                            Comment

                            • Witsend
                              Banned
                              • Nov 2012
                              • 2942

                              #15
                              A link to the list of seed and key modules. http://www.sandyblogs.com/techlink/feb2010techlink.pdf
                              Reply With Quote
                              Seems like a site doesn't want anyone with out special privilege to see the list. Kind of enjoyed the illustration they posted. Makes me wanna play with photo shop and have the guy in the shorts at the black tie event have his Ding Dong in his hand and say S... on this Y'all.
                              Last edited by Witsend; 12-22-2017, 02:42 PM.

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