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 MANUALSGMC2020ACADIA SLE, 2.5L ENG VIN AREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 344 (KEYLESS ENTRY SYSTEM AND REMOTE FUNCTIONS)DIAGNOSTIC INFORMATION AND PROCEDURESFRONT SIDE DOOR ACCESS CONTROL TRANSMITTER MALFUNCTIONCIRCUIT/SYSTEM TESTING
2020 GMC Acadia SLE, 2.5L Eng VIN A
Circuit/System Testing
2020 GMC Acadia SLE, 2.5L Eng VIN ASECTION Circuit/System Testing
WARNING: This page is about a different car, the 2023 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON.
- Using the master code, verify the Front Side Door Access Control Transmitter is functioning by unlocking the vehicle.
- If the Front Side Door Access Control Transmitter LED light does not illuminate and the vehicle does not unlockÂ
Replace the Front Side Door Access Control Transmitter.
- Go to next step: If the Front Side Door Access Control Transmitter LED light does illuminate and the vehicle does not unlockÂ
- If the Front Side Door Access Control Transmitter LED light does not illuminate and the vehicle does not unlockÂ
- Verify the Front Side Door Access Control Transmitter is the correct part number and frequency for the vehicle.
- If the part number or frequency is incorrect for the vehicleÂ
Replace the Front Side Door Access Control Transmitter.
- If the part number and frequency are both correctÂ
- If the part number or frequency is incorrect for the vehicleÂ
- Use the EL-52545Â
to verify the Front Side Door Access Control Transmitter is emitting a signal strength of 20% or greater.
- If the Front Side Door Access Control Transmitter does not emit a signal of 20% or greaterÂ
Replace the Front Side Door Access Control Transmitter.
- Go to next step: If the Front Side Door Access Control Transmitter does emit a signal of 20% or greaterÂ
- If the Front Side Door Access Control Transmitter does not emit a signal of 20% or greaterÂ
- 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.