2002 Chevrolet Impala LSFACTORY OEM SERVICE PROCEDURE

Rolling Code

Remote Keyless Entry (RKE) system uses rolling code technology. Rolling code technology prevents anyone from recording message sent from transmitter and using message in order to gain entry into vehicle. Term "rolling code" refers to way that RKE system sends and receives signals. Transmitter sends signals in a different order each time. Transmitter and RCDLR are synchronized to appropriate order. If a programmed transmitter sends a signal that is not in order that RCDLR expects, then transmitter is out of synchronization. This occurs after 256 presses of any transmitter button when it is out of range of vehicle.

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.