Shift Lever Can Be Moved without Brake Pedal Depressed (Pontiac)

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

Step	Action	Yes	No
Schematic Reference: Automatic Transmission Shift Lock Control Schematics Connector End View Reference: Automatic Transmission Shift Lock Control Connector End Views DEFINITION: Transmission shift lock does not lock in the PARK position with the ignition ON and the brake pedal not press or with the ignition OFF.
1	Did you perform the Diagnostic System Check - Automatic Transmission Shift Lock Control tests and necessary inspections?	Go to Step 2	Go to Diagnostic System Check - Automatic Transmission Shift Lock Control
2	Turn ON the ignition, with the engine OFF. Apply the parking brakes and block the wheels. Attempt to move the shift lever out of the PARK position without pressing the brake pedal. Does the shift lever move out of the PARK position?	Go to Step 3	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
3	Turn OFF the ignition. Press and hold the brake pedal. Attempt to move the shift lever out of the PARK position. Does the shift lever move out of the PARK position?	Go to Step 4	Go to Step 5
4	Test for a short to battery positive voltage in the ignition 3 circuit of the park lock solenoid. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 14	Go to Step 8
5	Connect a test lamp between the automatic transmission shift lock control switch ignition 3 voltage circuit at the automatic transmission shift lock control switch and a good ground. Turn ON the ignition, with the engine OFF Does the test lamp illuminate?	Go to Step 6	Go to Step 11
6	Turn OFF the ignition. Connect a test lamp between the A/T shift lock control solenoid supply voltage circuit at the automatic transmission shift lock control switch and a good ground. Turn ON the ignition, with the engine OFF. Press and release the brake pedal several times. Does the test lamp turn ON and OFF with the brake pedal?	Go to Step 7	Go to Step 9
7	Turn OFF the ignition. Connect a test lamp between the A/T shift lock control solenoid supply voltage circuit at the automatic transmission shift lock control solenoid and a good ground. Turn ON the ignition, with the engine OFF. Press and release the brake pedal several times. Does the test lamp turn ON and OFF with the brake pedal?	Go to Step 8	Go to Step 10
8	Inspect for poor connections at the harness connector of the automatic transmission shift lock control and park lock solenoids. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 14	Go to Step 13
9	Inspect the automatic transmission shift lock control switch for proper adjustment. Refer to Stop Lamp Switch Adjustment in Lighting Systems. Inspect for poor connections at the harness connector of the automatic transmission shift lock control switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 14	Go to Step 12
10	Repair the open in the automatic transmission shift lock control solenoid supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 14	-
11	Repair the open in the automatic transmission shift lock control switch ignition 3 voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 14	-
12	Replace the automatic transmission shift lock control switch. Refer to Stop Lamp Switch Replacement in Lighting Systems. Did you complete the replacement?	Go to Step 14	-
13	Replace the automatic shift lock control/park lock solenoids. Refer to Floor Shift Control Replacement in Automatic Transaxle 4T65-E. Did you complete the replacement?	Go to Step 14	-
14	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2