6-Minute Vehicle Key Relearn - With RPO 5L5
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
This procedure will only relearn the vehicle keys. This procedure will not learn the immobilizer prerelease password or the challenge/response data. Do not use this procedure as a substitute for a 10-minute relearn when replacing or reprogramming a TDM or ECM. Doing so will result in a failure to learn the prerelease password and/or the challenge/response data.
This 6-minute learn procedure should be used when all vehicle keys are desired to be replaced or reprogrammed. This procedure will erase all previously learned vehicle keys from the TDM. Once the 6-minute learn procedure has been completed, any remaining vehicle keys may be programmed using the Adding Keys procedure to ensure their continued functionality.
- With an unlearned master vehicle key, turn ON the ignition, with the engine OFF.
- Observe the security indicator, after approximately 2 minutes the indicator will turn off.
- Turn OFF the ignition and wait 5 seconds.
- Repeat steps 1-3 two more times for a total of 3 cycles or 6 minutes.
- With a master vehicle key, start the vehicle. The vehicle has now learned the key transponder information.
- If additional keys are required to be learned, refer to Adding Keys .
- With a scan tool, clear any DTCs.
IMPORTANT:
The TDM learns the key transponder information upon the ignition switch transition from OFF to ON. You must turn the ignition OFF before attempting to start the vehicle.