Shift Interlock System: Diagnosis Chevrolet TrailBlazer I

Diagnostic Starting Point - Automatic Transmission Shift Lock Control

Begin the system diagnosis by reviewing the Automatic Transmission Shift Lock Control Description and Operation . Reviewing the description and operation information will help you determine the correct symptom diagnostic procedure when a malfunction exists. Reviewing the description and operation information will also help you determine if the condition described by the customer is normal operation.

Refer to SYMPTOMS - AUTOMATIC TRANSMISSION SHIFT LOCK CONTROL in order to identify the correct procedure for diagnosing the system and where the procedure is located.

Symptoms - Automatic Transmission Shift Lock Control

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the automatic transmission shift lock control system. Refer to CHECKING AFTERMARKET ACCESSORIES in Wiring Systems.
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

1. «PARK LOCK SOLENOID INOPERATIVE»(ref-188504-S36491740062005090500000)
2. «SHIFT LEVER DOES NOT MOVE WITH BRAKE PEDAL DEPRESSED»(ref-188504-S37860108592005090500000)
3. «Shift Lever Can Be Moved without Brake Pedal Depressed»(ref-188504-S01209653092005090500000)