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Key Replacement (No Spare Key Available)

  1. If the Ignition Key is lost and there is no spare key, determine the mechanical code from the code on the Ignition Key Lock Cylinder. The code may also be determined from the dealer invoice for the car, or from a General Motors Dealer.
  2. Cut a new key to this mechanical code. Use a blank PASS Key test key which has no resistance pellet. This key will be used to operate the Ignition Switch for the remaining steps.
  3. Remove the hush panel under the steering column and disconnect C228 (two-cavity connector leading to the steering column).
  4. Insert the male half of the connector into the female pigtail connector from the J35628 Interrogator.
  5. Set the Key Code Selector on the Interrogator (J35628 or equivalent) to "1".
  6. Attempt to start engine using the key made in step 2.
    • If engine starts, the Key Code Selector is set to the correct electrical code. Cut a new key having this electrical code. The new key will be customer's replacement.
    • If engine does not start, turn Ignition Switch to OFF, then turn the Key Code Selector to the next higher position. Wait four minutes and attempt to start the engine using the new electrical code. Use the 4 minute Timer on the J35628 Interrogator to indicate the 4 minute interval. Start the Timer by depressing the "Start" rocker switch. The red indicator will turn off at the end of a 4 minute interval.
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