8HP45 TCM PROGRAMMING PROCEDURE
PROGRAMMING THE TRANSMISSION CONTROL MODULE (TCM)

NOTE: When replacing a Transmission Control Module (TCM), the TCM must be programmed.

NOTE: Failure to properly program the TCM may result in the illumination of the Malfunction Indicator Lamp (MIL) and setting DTC(s).

NOTE: While performing the TCM programming procedure, the vehicle battery must be maintained between 10 and 16 volts. Ambient temperature must be between 0° C (32° F) 60° C (140° F). Vehicle must be in Park with brake pedal depressed.

1. Using the scan tool and Dealer Connect, download the appropriate TCM flash file to the scan tool.
2. Ignition on, engine not running.
3. Vehicle in park with the brake pedal depressed.
4. Following the menu on the scan tool, program the TCM.
5. After the TCM has been programmed, a Drive Lean must be performed. Perform the DRIVE LEARN procedure. .
6. Clear any stored DTCs.
7. Road test the vehicle above 40 m.p.h. for at least two minutes.
8. With the scan tool, select View DTCs in the TCM.

Are there any DTCs present?

Yes

- Perform the appropriate diagnostic procedure(s).

No

- Test Complete
- Perform the TRANSMISSION VERIFICATION TEST. Verification Tests.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

8HP45 TCM Programming Procedure

Use the Manual With the Right Hardware

When to See a Mechanic