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HOMESERVICE MANUALSCHEVROLET2019TAHOE LS, 4WD, GAS/ETHANOLREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 98 (CELLULAR SYSTEM, ENTERTAINMENT SYSTEM, AND NAVIGATION SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESONSTAR BUTTON MALFUNCTIONCIRCUIT/SYSTEM VERIFICATION
2019 Chevrolet Tahoe LS, 4WD, Gas/Ethanol

Circuit/System Verification

2019 Chevrolet Tahoe LS, 4WD, Gas/EthanolSECTION Circuit/System Verification
WARNING: This page is about a different car, the 2018 Chevrolet Sonic. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

Contact the OnStar® Call Center first before pressing the emergency button in order to notify them of the test.

  1. Ignition ON.
  2. Verify no DTCs are set.
    • Go to next step: If no DTCs are set 
  3. Verify that each button of the S51 Telematics Button Assembly operates normally by pressing each button individually.
    • If none of the buttons operate normally 

      Refer to Circuit/System Testing.

    • If some, but not all, of the buttons operate normally 

      Test or replace the A10 Inside Rearview Mirror.

    • Go to next step: If all of the buttons operate normally 
  4. 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.