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 MANUALSCHEVROLET2019TAHOE LS, 4WD, GAS/ETHANOLREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 118 (THEFT DETERRENT SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESCONTENT THEFT DETERRENT 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.
- Ignition ON.
- Verify each indicator/message transition between the ajar and closed state while opening and closing each vehicle door, hood, and rear compartment.
- If the indicator/message does not change
Refer to Door Ajar Indicator Malfunction , or Hood Ajar Indicator/Message Malfunction .
- Go to next step: If each indicator/message changes
- If the indicator/message does not change
- Completely lower the driver door window and close all vehicle doors, ignition OFF.
- Arm the content theft deterrent system by locking the door with the keyless entry transmitter.
- Verify the scan tool BCM Content Theft Deterrent Alarm Status parameter is Armed.
- If not Armed
Refer to Keyless Entry System Malfunction .
- Go to next step: If Armed
- If not Armed
- Without disarming the system, reach in through the open driver window and open the driver door.
- Verify the scan tool BCM Content Theft Deterrent Alarm Status parameter is Alarm.
- If not Alarm
Replace the K9 Body Control Module.
- Go to next step: If Alarm
- If not Alarm
- 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.