Where is the (TCM) Transmission Control Module located?

Tiny
ED SIMMONS
  • MEMBER
  • 2001 PONTIAC GRAND PRIX
  • 3.1L
  • V6
  • 2WD
  • AUTOMATIC
  • 255,000 MILES
Is it part of the ECM? Please let me know.

Thank you
Tuesday, January 12th, 2021 AT 2:43 AM

7 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

The TCM is part of the engine control module.

It is located in the air filter assembly. I attached a picture and the procedure for you to view.

Roy

Service of the PCM should normally consist of either replacement of the PCM or EEPROM programming. If the diagnostic procedures call for PCM replacement, inspect the PCM first to see if the PCM is the correct part. If the PCM is faulty, remove the PCM and install the new service PCM.

The new service PCM will not be programmed. You must program the new PCM. DTC P0602 indicates the EEPROM is not programmed or has malfunctioned. There are no user serviceable parts in this PCM. The PCM should never be opened for any reason.

IMPORTANT: When replacing the production PCM with a service PCM (controller), transferring the broadcast code and production PCM number to the service PCM label is important. Do not record this information on the PCM cover. Transfer allows positive identification of PCM parts throughout the service life of the vehicle.

Removal Procedure

imageOpen In New TabZoom/Print

1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
2. Remove the left sheet metal diagonal brace. Refer to Brace Replacement - Sheet Metal Diagonal in Body Front End.
3. Remove the air cleaner intake duct (1).

ImageOpen In New TabZoom/Print

4. Remove the air cleaner assembly cover and lift the PCM from the assembly.
5. Disconnect the harness connectors from the PCM.
6. Remove the PCM from the engine compartment.
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Tuesday, January 12th, 2021 AT 3:35 AM
Tiny
ED SIMMONS
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Thank you. I Have an identical parts cars car I will be swapping from.
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Tuesday, January 12th, 2021 AT 3:39 AM
Tiny
ASEMASTER6371
  • MECHANIC
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You will need to have the donor programmed to your VIN number in order for it to work properly.

You are welcome.

Always glad to help.

Roy
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Tuesday, January 12th, 2021 AT 3:47 AM
Tiny
ED SIMMONS
  • MEMBER
  • 4 POSTS
Will the car be drivable to get to dealer for this?
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Tuesday, January 12th, 2021 AT 4:12 AM
Tiny
ASEMASTER6371
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It may. If you are going to change it, I would do it in the parking lot of the dealer so they can come to the car and do the necessary programming.

Roy
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Tuesday, January 12th, 2021 AT 4:21 AM
Tiny
ED SIMMONS
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Okay. Thanks again.
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Tuesday, January 12th, 2021 AT 4:22 AM
Tiny
ASEMASTER6371
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You are welcome.

Roy
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Tuesday, January 12th, 2021 AT 4:31 AM

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