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.
2021 GMC Yukon AT4FACTORY OEM SERVICE PROCEDURE
Remote Functions
- Specifications
- Schematic Wiring Diagrams
- Diagnostic Information and Procedures
- DTC B1442
- DTC B1444
- DTC B1446
- DTC B1451
- DTC B1511
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Diagnostic Aids
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC B1513
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Diagnostic Aids
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC B1AEE
- Symptoms - Remote Functions
- Garage Door Opener Malfunction
- Keyless Entry System Malfunction
- Remote Vehicle Start Malfunction
- Repair Instructions
- Low Frequency Console Antenna Replacement (DCH without Denali)
- Low Frequency Console Antenna Replacement (DCH with Denali)
- Low Frequency Console Antenna Replacement (D07 without Denali)
- Low Frequency Console Antenna Replacement (D07 with Denali)
- Low Frequency Console Number 2 Antenna Replacement (DCH)
- Low Frequency Console Number 2 Antenna Replacement (DCK, D07)
- Low Frequency Rear Compartment Antenna Replacement
- Low Frequency Rear Bumper Antenna Replacement
- Low Frequency Body Side Antenna Replacement
- Remote Function Actuator Module Replacement
- Garage Door Opener Transmitter Replacement
- Remote Control Door Lock and Theft Deterrent Transmitter Programming
- Description and Operation
- Garage Door Opener Description and Operation
- Keyless Entry System Description and Operation
- Notes
- Keyless Entry Transmitters
- Side Antennas
- Rear Fascia Antenna
- Immobilizer Coil Antenna
- Rear Console Antenna
- Rear Compartment Antenna
- OnStar® Remote Link
- Body Control Module (BCM)
- Unlock Driver Door Only - Active
- Unlock All Doors - Second Operation - Active
- Unlock Driver Door Only - Passive
- Unlock All Doors - Passive
- Lock All Doors - Active
- Lock All Doors - Passive
- Rear Compartment Lid Release - Active
- Rear Compartment Lid Release - Passive
- Vehicle Locator/Panic Alarm/Active
- Remote Vehicle Start/Active
- Hood Ajar Switch/Active
- Remote Vehicle Start Circuit Description/Active
- Keyless Entry Personalization
- Tire Pressure Monitor Sensor and RF Diagnostic Tool Description and Operation
- Special Tools and Equipment
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.
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