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 SLREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 184 (KEYLESS ENTRY SYSTEM AND REMOTE FUNCTIONS)REPAIR INSTRUCTIONSREMOTE CONTROL DOOR LOCK AND THEFT DETERRENT TRANSMITTER PROGRAMMINGREPLACING TRANSMITTERS (WITHOUT SPS)
2020 GMC Acadia SL
Replacing Transmitters (Without SPS)
2020 GMC Acadia SLSECTION Replacing Transmitters (Without SPS)
WARNING: This page is about a different car, the 2021 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
- This procedure will unlearn all previously learned transmitters. All transmitters that are to be programmed must be with the vehicle at the time of service.
- A minimum of two transmitters must be learned during this procedure. The vehicle will not exit the learn mode until at least a second transmitter is learned.
- This procedure will take approximately 30 minutes to complete.
- A total of eight transmitters can be learned to a single vehicle.
- This procedure will only learn the vehicle transmitter information. This procedure will not learn any immobilizer information between the body control module (BCM) and engine control module (ECM).
- This procedure may be used with or without existing learned transmitters being present. If existing transmitters are present, keep the transmitters away from the vicinity of the vehicle. Failure to keep learned transmitters away from the vehicle will result in the learn changing to the Adding Transmitters procedure.
- Insert the vehicle key into the key cylinder in the driver door and turn the key to the unlock position five times within ten seconds. The driver information center will display Remote Learn Pending, Please Wait.
- After ten minutes, the driver information center will display Press Engine Start Button To Learn. Press the ignition mode switch. The driver information center will again display Remote Learn Pending, Please Wait.
- Repeat Step 2 two additional times, for a total of thirty minutes. All previously known transmitters have now been unlearned. Remaining transmitters can be relearned during the next steps. The driver information center display will now display Ready For Remote # 1.
- Place the new transmitter into the transmitter pocket.
- Press and release the ignition mode switch. When the transmitter is learned, the driver information center will indicate that it is ready to program the next transmitter.
- Remove the transmitter from the transmitter pocket and press the unlock button. To program additional transmitters, repeat Steps 4 through 6.
- When all additional transmitters are programmed, press and hold the ignition mode switch for 5 seconds to exit programming mode.
NOTE:
The key pocket is located in the center console at the rear. Place the key into the slot for the key pocket.
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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.