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Test B: Gearshift Lever Does Not Move With Brake Pedal Depressed

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: For circuit reference, see CONNECTOR IDENTIFICATION  and WIRING DIAGRAMS  .
  1. Did you review the DESCRIPTION and OPERATION and perform the necessary inspections? If so, go to next step. If not, see DESCRIPTION & OPERATION  .
  2. Turn the ignition switch to the ON position. Press and hold the brake pedal. Attempt to move the gearshift lever out of the Park position. Does the gearshift lever move out of the Park position? If so, concern is intermittent. See SYMPTOM DIAGNOSIS  under TROUBLE SHOOTING. If not, go to next step.
  3. Turn the ignition switch to the OFF position. Disconnect the stoplamp switch. Turn the ignition switch to the ON position. Attempt to move the gearshift lever out of the Park position. Does the gearshift lever move out of the Park position? If so, go to step  7 . If not, go to next step.
  4. Turn the ignition switch to the OFF position. Leave the stoplamp switch disconnected. Connect a test light between ground and the shift lock solenoid voltage supply circuit (Dark Green/White wire). Turn the ignition switch to the ON position. Does the test light illuminate? If so, go to step  10 . If not, go to next step.
  5. Turn the ignition switch to the OFF position. Connect a test light between ground and the park lock solenoid ignition feed circuit (Light Green/Black wire). Turn the ignition switch to the ON position. Does the test light illuminate? If so, go to next step. If not, go to step  9 .
  6. Turn the ignition switch to the OFF position. Connect a test light between the ground circuit (Black wire) and the ignition feed circuit (Light Green/Black wire) at the park lock solenoid. Turn the ignition switch to the ON position. Does the test light illuminate? If so, go to step  8 . If not, go to step  11 .
  7. Inspect the stoplamp switch for poor connections. Did you find and correct the condition? If so, go to step  14 . If not, go to step  13 .
  8. Inspect the park lock/shift lock solenoid assembly for poor connections. Did you find and correct the condition? If so, go to step  14 . If not go to step  12 .
  9. Repair the park lock solenoid ignition feed circuit (Light Green/Black wire) for an open or high resistance. After repairs, go to step  14 .
  10. Repair the shift lock solenoid voltage supply circuit (Dark Green/White wire) for a short to battery voltage. After repairs, go to step  14 .
  11. Repair the park lock solenoid ground circuit (Black wire) for an open or high resistance. After repairs, go to step  14 .
  12. Replace the park lock/shift lock solenoid assembly. See FLOOR SHIFT CONTROL ASSEMBLY  under REMOVAL & INSTALLATION. After repairs, go to step  14 .
  13. Replace the stoplamp switch. See STOPLAMP SWITCH  under REMOVAL & INSTALLATION. After repairs, go to next step.
  14. Operate the system in order to verify the repair. Did you find and correct the condition? If so, system is okay. If not, go to step  2 .
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