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.
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HOMESERVICE MANUALSCHEVROLET2025TRAILBLAZER ACTIV, FWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESPROGRAMMING AND SETUP - ALL SYSTEMSREPAIR INSTRUCTIONSK20 ENGINE CONTROL MODULE: PROGRAMMING AND SETUPREPROGRAM CONTROL MODULE
2025 Chevrolet Trailblazer ACTIV, FWD
Reprogram Control Module
2025 Chevrolet Trailblazer ACTIV, FWDSECTION Reprogram Control Module
To reprogram an existing K20 Engine Control Module, perform the following procedure:
- Access the Service Programming System and follow the on-screen instructions for the control module: K20 Engine Control Module
- Ignition - On / Vehicle - In Service Mode
- Perform the SPS function:
- K20 Engine Control Module - Follow the on-screen instructions.
- K71 Transmission Control Module - Follow the on-screen instructions.
- Perform the scan tool function: Clear DTCs
- Perform the scan tool learn/reset function:
- Barometric Pressure Sensor Reset - If equipped
- Fuel Pressure Regulator Learn - If equipped
- Fuel Rail Pressure Relief Valve Learned Values Reset - If equipped
- Intake System Learned Values Reset - If equipped
- Throttle Body Idle Air Flow Compensation Reset
- Turbocharger Wastegate Learn - If equipped
- Turbocharger/Supercharger Boost Control Initial Position Learn - If equipped
- Ignition/Vehicle & All vehicle systems - Off
- Operate the vehicle within the conditions of the customer's concern.
NOTE:
If both controller options below are listed, select K20 Engine and K71 Transmission Control Modules.
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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.