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 MANUALSCHEVROLET2025TAHOE COMMERCIAL, 4WDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMDATA COMMUNICATIONS - DIAGNOSTIC INFORMATION AND PROCEDURES (1 OF 4)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B1A11 (K299 AUDIO/VIDEO INTERFACE MODULE)CIRCUIT/SYSTEM VERIFICATION
2025 Chevrolet Tahoe Commercial, 4WD
Circuit/System Verification
2025 Chevrolet Tahoe Commercial, 4WDSECTION Circuit/System Verification
- Ignition ON/Vehicle In Service Mode.
- Verify that DTC U0073-U007E, DTC U0100-U02FF, or U164B is not set.
- If any of the DTCs are set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If none of the DTCs are set
- If any of the DTCs are set
- Verify DTC B1A11 is not set.
- If the DTC is set
Refer to Circuit/System Testing.
- Go to next step: If the DTC is not set
- If the DTC is set
- A fault is currently not present and may be an intermittent condition.
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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.