1999 Chevrolet Pickup C2500, 4D Pickup, 7.4 J, AutomaticFACTORY OEM SERVICE PROCEDURE

Transmitter Synchronization

  1. Transmitter synchronization may be necessary due to the security method used by the RKE system. The transmitter does not send the same signal twice to the receiver.
  2. The receiver will not respond to a signal which has been previously sent. This prevents anyone from recording and playing back the signal from the transmitter.
  3. Resynchronization will be necessary if any of the following occur:
    • You change the transmitter battery.
    • You disconnect the vehicle battery.
    • You push the transmitter button 256 times out of the range of the receiver.
  4. In order to synchronize the transmitter with the receiver, perform the following:
    • Stand close to the vehicle.
    • Simultaneously press and hold the LOCK and UNLOCK buttons on the transmitter for seven seconds.
    The door locks should cycle to confirm synchronization.
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:

  • • 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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