Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Reprogram Control Module
To program an existing K71 Transmission Control Module, perform the following procedure.
- Install EL-49642 SPS programming support tool.
- Access the Service Programming System (SPS) and follow the on-screen instructions.
- Perform one of the following SPS Programming functions:
- K20/ K71 Engine and Transmission Control Modules and follow the on-screen instructions
- K71 Transmission Control Module and follow on-screen instructions.
NOTE:If both controller options below are listed, select K71 Transmission Control Module
- Perform the Vehicle Setup, follow the on screen instructions.
- With a scan tool, clear DTCs from the K71 Transmission Control Module.
- Ignition OFF, allow vehicle systems to power down.NOTE:
If may take up to 2 minutes for all vehicle systems to power down.
- Perform the Service Fast Learn (SFL), follow the on screen instructions.NOTE:
If the transmission fluid temperature is not between 75 to 85°C (167 to 185°F) the scan tool will not allow the procedure to be performed.
- Ignition OFF for 2 minutes.
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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.