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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1442 (KEYLESS ENTRY SYSTEM & REMOTE FUNCTIONS)REPAIR INSTRUCTIONSTRANSMITTER PROGRAMMING (WITH RPO Y41 - NORTH AMERICA AND ASIA)METHOD 2 - ERASING/ADDING TRANSMITTERS (NO KNOWN TRANSMITTER AVAILABLE)
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6

Method 2 - Erasing/Adding Transmitters (No Known transmitter Available)

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Method 2 - Erasing/Adding Transmitters (No Known transmitter Available)
WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

This procedure will first erase all known transmitters. The procedure will then program a single transmitter or multiple transmitters. Method 2 is a series of three 10-minute key cycles, for a total of 30 minutes. This procedure requires that you have a replacement transmitter and the vehicle's mechanical key.

IMPORTANT: Do not place any known good transmitters within 10 feet of the vehicle when programming with Method 2. If the RCDLR recognizes a known good transmitter during Method 2 programming, the programming mode will resort to Method 1.
  1. The vehicle must be OFF.
  2. Insert the vehicle key in the driver door lock cylinder located in the driver door handle and cycle the key 5 times within 5 seconds.
  3. The DIC will display a message: PRESS START CONTROL TO LEARN.
  4. Press the start control knob.
  5. The DIC will display a message: WAIT 10 MINUTES, and then begin to count down from 10 to 0, one minute at a time.
    6. IMPORTANT: Once the timer has expired, it is necessary to proceed to the next step within 5 minutes. Failure to do so will result in the exiting of the program mode and the procedure will have to be restarted at step 1.
  6. When the counter reaches 0, DIC will display: PRESS START CONTROL TO LEARN.
  7. Repeat steps 4-6 two more times, for a total of 30 minutes.
  8. At the end of the 30 minute cycle, a beep will occur and the DIC will display: READY FOR ELECTRONIC KEY 1. At this time all previously known transmitters have been erased.
  9. 9. Place the new/replacement transmitter in the console bin pocket with the buttons facing forward. When transmitter 1 is programmed, a beep will be heard and the DIC will display: READY FOR ELECTRONIC KEY 2.
  10. Additional transmitters can be programmed by taking transmitter 2 out of the pocket and inserting transmitter 3. If desired, up to 4 transmitters can be programmed. Once 4 transmitters have been learned, the DIC will display a message: MAX ELECTRONIC KEYS LEARNED, and automatically exit the program mode.
  11. If learning less than 4 transmitters, press the start control knob to exit the program mode.
    12. IMPORTANT: Newly programmed transmitters will not function until program mode has been exited (DIC is blank). This must be done prior to pressing the UNLOCK button in the next step.
  12. Press the UNLOCK button on each transmitter that was programmed to finalize the programming and confirm system operation.
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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.