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 MANUALSCHEVROLET2018SONIC LS, 1.8L ENG VIN H, AUTOMATIC TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESPROGRAMMING AND SETUP - ALL SYSTEMSREPAIR INSTRUCTIONSK33 HVAC CONTROL MODULE: PROGRAMMING AND SETUPUNSUCCESSFUL PROGRAMMING RECOVERY

2018 Chevrolet Sonic LS, 1.8L Eng VIN H, Automatic Trans

Unsuccessful Programming Recovery

2018 Chevrolet Sonic LS, 1.8L Eng VIN H, Automatic TransSECTION Unsuccessful Programming Recovery

If programming a control module is not successful, perform the following procedure:

Verify the control module, data link connector and programming tool connections are secure and the tool software is up to date.
Ignition - On / Vehicle - In Service Mode
Perform the SPS function: Programming
Verify the control module programming is successful.
- If the programming is not successful
1. Ignition/Vehicle - Off - For greater than 1 min
2. Ignition - On / Vehicle - In Service Mode
3. Perform the SPS function: Programming
  - If the programming is not successful - Replace the component: K33 HVAC Control Module
  - Go to next step: If the programming is successful
4. All OK.
- Go to next step: If the programming is successful
All OK..

RENDER: 1.0x

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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.