2016 Gmc Acadia ''Speed Limited To --- Mph "" Message No Rev When In Gear

Pawel Owner/Technician New Jersey Posted   Latest   Edited  
Resolved
Drivetrain
2016 GMC Acadia SLE 3.6L (D LLT) 6-spd (6T75) — 1GKKVPKD4GJ332969
No Acceleration When In Gear
No Rev When In Gear

Vehicle had transmission replaced due to shudder of torque converter

used low millage transmission was installed 

vehicle starts normal has communication with all modules

there is no codes in any module

in park and neutral u can rev ungine normal

in drive and reverse vehicle spins wheels only at idle speed

there is no responce from accelerator pedal 

message is displeyed everytime u put in gear 

“speed limited to — mph"

done this job many times never had issiues 

any ideas tranmsission data pids look ok as well as imputs 

seems to me like software issiue maybe reprogram ??

I never had to reprogram those before im lost 

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Caleb Diagnostician
Indiana
Caleb
 

Need to swap the original TCM/TECHM from the original transmission or install and program a new TCM/TECHM from the dealer ONLY.

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Pawel Owner/Technician
New Jersey
Pawel
 

Gm ?? Never knew that I did 2017 traverse month ago had no issiue

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Caleb Diagnostician
Indiana
Caleb
 

GM has not been swapping modules for almost a decade. Many documents on this site about not using used “Global A” modules. Every once in a while you get lucky. But I would start with I posted above before going any further.

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Agree
Sam Mobile Technician
Michigan
Sam
 

Caleb, That is good advice. Here is what I know about the USED TCM situations on GM. I have programmed many of these used. As long as there is 1 calibration number that is different it will write the VIN into the used TCM when it programs it. If the VIN is not changed. I get calls that there is a shudder upon launch or that the cruise control doesn't work. It is always something weird. I have…

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Joseph Technician
South Carolina
Joseph
 

Just did a programming on a 16 Acadia last week. They called me for a diag because of the same symptoms. I found it funny because there were no codes in any module. Programming the Tehcm cured the symptoms. Unfortunately the new (used that is) trans had issues as well. Seems like they are having valve body issues on these newer 6T75's good luck

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Pawel Owner/Technician
New Jersey
Pawel
 

Thank you so can i just reflash this tcm or i need to swap back to old transmission tcm

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Pawel Owner/Technician
New Jersey
Pawel
 

PLEASE LET ME KNOW

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Caleb Diagnostician
Indiana
Caleb
 

We are trying to help you Pawel. If I was you I would just swap the original back in. No guarantees the programming change the VIN in the “new” one.

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Eric Owner/Technician
Wisconsin
Eric
 

Pawel, Do what Caleb said, either transfer the module from the original transmission to the replacement used transmission or install and program a brand new (not used) module purchased from the OEM dealer. Eric

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Pawel Owner/Technician
New Jersey
Pawel
 

Understood ty

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Joseph Technician
South Carolina
Joseph
 

I programmed the one that was in the used transmission as a diagnostic step. However the shop knows that if the TCM goes south or doesn't work it's not my issue. Caleb and Eric gave you the correct way to do it.

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Helpful
Pawel Owner/Technician
New Jersey
Pawel
 

I understand and appreciate all help

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Caleb Diagnostician
Indiana
Caleb
 

The 6T70-75's are garbage piles and have been ever since they came out in 07 I think. They have problems with everything, TECHM, Valve Body, Hard parts, TC, lol the list goes on and on.

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Pawel Owner/Technician
New Jersey
Pawel
 

100% i did over 60 swaps here since like 2012 Mostly shudder and slips I never had this issue Thanks everybody for help i will keep you posted monday

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Lonny Diagnostician
Florida
Lonny
 

Global A vehicle. Swap the module or replace new

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Pawel Owner/Technician
New Jersey
Pawel Resolution
 

I did program used trans tcm without swapping old valve body with gm sps It worked vehicle is fixed Thank you everybody Merry Christmas

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Thanks
Timothy Owner/Technician
Wisconsin
Timothy
 

You got lucky that it took the programming. Global A is always a crap-shoot when trying used modules. Used car-lots do it all the time. The success on reprogramming used is about 30%.

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Pawel Owner/Technician
New Jersey
Pawel
 

Honestly i replaced about 40 maybe more of those transmission tru out this gm platform and i never had any issue nor i ever had to program anything this was first time it happend

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