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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 807 (THEFT DETERRENT SYSTEM)REPAIR INSTRUCTIONSADDING KEYS
1999 GMC Forward Control 5.7 R, Automatic

Adding Keys

1999 GMC Forward Control 5.7 R, AutomaticSECTION Adding Keys
WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

Tools Required: J 35628-A  Vats/Pass Interrogator Tester

IMPORTANT: When servicing the PASS-Key(R) II system, obtain all the vehicle ignition keys. Verify the key code values with the J 35628-A.
  1. In order to copy a PASS-Key(R) II ignition key, determine the necessary key code or resistance value.
  2. Determine the master ignition key code using the J 35628-A as outlined in the following procedure:
    IMPORTANT: Disconnect the tool wiring connectors.
    1. 2.1. Turn ON the J 35628-A.
    2. 2.2. Insert the key into the tool lock cylinder.
    3. 2.3. Note the measured key code of the master ignition key as displayed on the key code reader.
    4. 2.4. Obtain a key blank matching the key code.
    5. 2.5. Cut the key blank to match the original key.
RENDER: 1.0x

NO RELATED

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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.