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 MANUALSCHEVROLET2018TRAVERSE LS, 4WDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTENTERTAINMENT SYSTEMSCELLULAR SYSTEM, ENTERTAINMENT SYSTEM, AND NAVIGATION SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESBLUETOOTH MALFUNCTION (IO5/IO6)CIRCUIT/SYSTEM VERIFICATION

2018 Chevrolet Traverse LS, 4WD

Circuit/System Verification

2018 Chevrolet Traverse LS, 4WDSECTION Circuit/System Verification

Verify no DTCs are present.
- If any DTCs are present
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If no DTCs are present
Verify the K74 Human Machine Interface Control Module calibrations are current.
- If the K74 Human Machine Interface Control Module calibrations are not current
  Reprogram the K74 Human Machine Interface Control Module and re-evaluate the concern.
- Go to next step: If no update calibrations are available

NOTE:

The MIT tool can be used to test either cellular phone or streaming audio functions. Refer to the tool instructions, and perform the appropriate test (s) related to the customers concern in the following steps.

Ignition ON, infotainment system ON.
Verify the infotainment system successfully pairs with the MIT tool.
- If the infotainment system does not successfully pair with the MIT tool.
1. Perform the 3 vehicle Factory Resets located in Setting>System>Return to Factory Settings.
2. Verify the infotainment system successfully pairs with the MIT tool.
  - If the infotainment system does not successfully pair with the MIT tool.
    Replace the K74 Human Machine Interface Control Module.
- Go to next step: If the infotainment system successfully pairs with the MIT tool.
Verify the infotainment system successfully completes the desired feature test using the MIT tool.
- If the feature test is successful but the audio is distorted.
  Refer to Speaker Malfunction (UQF without NKC) Speaker Malfunction (UQF with NKC) Speaker Malfunction (UQA)
- If the feature test is not successful
  Replace the K74 Human Machine Interface Control Module.
- Go to next step: If the feature test is successful
Verify the customers device can be paired with the infotainment system.
- If the device can not be paired with the infotainment system.
1. Perform a reset on the device. Refer to device manufacture's information.
  - Verify the customers device can be paired with the infotainment system.
    If the device still will not pair inform the customer the issue is with the device.
  - Go to next step: If the device successfully pairs with the infotainment system.
2. Verify audio can be heard while streaming from the device.
  - If audio can not be heard while streaming.
    Ensure the volume on the device is turned up to an adequate level.
- Go to next step: If audio can be heard while streaming.
All OK.

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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.