Transmission Control Module Programming Tip
When programming a Transmission Control Module on the Equinox, you will need to get the programming calibration number from the original module before programming the new module. SPS (GM's Program) will ask for this number before prompted to program.
If you have a Tech2Win then you should be able to check the part number that's in the old module. This way when SPS asks you which calibration you wish to use you will have it to enter in the software for programming.
Please do not guess or choose a number that could be close, it needs to be exact. Entering the wrong calibration could result in programming failure and shifting issues.
Most of the time you do not need to do this on other models but on the Equinox its absolutely important. Hope this helps anyone in the future.
So if you have a bricked TCM can you just enter the last file listed on tis2web.service.gm.com/tis2web?
Unfortunately you can not, because if the module is bricked then it mostly likely will result in SPS not communicating with the module any more. It will just kick you out of the programming session at that point until it sees communication again. In cases like that your looking at a module replacement, but a used one will be fine to reprogram it to the original calibration.
Henry, I never have issues using SPS with MDI or MDI2 asking for calibration numbers for these applications. I have heard others talk about this issue when using a J Box. The only time I have issues is when an aftermarket remanufactured transmission or TCM has been installed and they install a base programming for dyno testing or a failed "dongle" programming. That is when the fun begins…
Right John. Having the correct transaxle is extremely important. There are notable differences in component build, especially between Gen 1 and Gen 2 transaxles. Gen 3 accommodates hybrid features with the need to maintain pressure at stops and is another story. There are some visual clues that may or may not assist in identifying Gen 1 from Gen 2 transaxles with the unit out of the vehicle…
Thats really great feed back John, i have only seen them on a blank or a reman module. Your correct you dont run into this alot, but ive noticed it on a couple of sessions ive had and sometimes the numbers do not match what the module is putting out. I just thought ide mention it in case some one runs into this issue. It happened to me like 5 times now but its usually on blank modules and
Henry is this just for 2011 ? I have done many equinox trans controllers (lots of shops replacing transmissions) and have not run into this issue yet. Its Usually a normal GM program job , I just hate waiting for the trans fluid temp to warm up so you can complete the adaptions... Thanks for the info.
Good Morning Bill, to be honest i have not noted what years this is required for. I will start to notate it during my sessions and update you when i can. I know what you mean about the temp, it is a pain. I've only seen them on very few blank or reman modules at the moment, but it doesnt really happen that often. When replacing used or salvages i dont really run into these issues. I just noticed
Twice, I have had SPS ask me to select a Hardware Number when programming a TCM. It happened on 2 separate 2012 Chevrolet Cruzes, where I was called to program the TCM, after a replacement GM Transmission was installed. Interestingly, neither time could I find my Number (obtained using TCM Module ID Info with GM GDS2) in the List provided in SPS. Several other people I spoke with ran into the
Craig, I have heard about this dilemma on 2012 Cruze models as well from other mobile guys. I have done several 2012 Cruze units and never had this issue. I have to ask what interface was being used? Good information you provided.
Hi John, I was using the GM MDI2 both times. I have done other Cruze TCMs (various years) since then, and have not been asked for this information.
Craig, Good to know. I will be sure to use your tip if I run into this issue.
HI Henry. The Equinox/Terrain platform is Global A, supported with GDS 2 and MDI genuinegmparts.com/pdf/positionst….pdf For earlier vehicles such as '09 Malibu, Tech 2 and Tech2Win will work for the desired info and while it is not published, I've successfully used GDS to obtain transaxle info from a 2009 Malibu 2.4L with 6T transaxle, but building the vehicle as an