Question about 2005 Hummer H2
Shift gear is locked in PARK and cannot move - the display in dash is showing that it is in reverse - car will not start - PLEASE HELP!!!
One reason for that I have experienced is when the torque on the parking pawl inside the transmission is particularly great, such as if you put the trans in park on a steep incline. If that is the case, then if you can recruit a husky by-stander or two to push on which ever end of the car is low so as to take the pressure off the pawl it will release. Even on level ground there might be something that is putting torque on the front wheels, so gently rocking the car back and forth might free it up.
The other thing to is the shifter lock has broke and needs to be replaced but there is a over ride for you to unlock it but you need to remove the center console where the shifter is to get to it. Here is a link that helped me with the inlaw's car. http://www.lxforums.com/board/showthread.php?t=73876
Good luck and hope this helps. Keep me posted, be glad to answer any more questions.
Posted on Jul 12, 2009
Check the linkage that goes from the shift lever down to the transmission. It sounds like somewhere along the line, it has become disconnected or has broken.
if that parts are clean then It sounds like you have a shift control solenoid that has high resistance causing the hard shift you describe. Scan the PCM for trouble codes if none are present you could have a internal transmission problem.
Posted on Jul 17, 2009
this is for newer malibu's, but may work for you too.
#08-05-22-009: Intermittently Brake Lights (Stop Lamp) Do Not Function Correctly, Extended Travel to Shift Out of Park, Cruise Control Inoperative, DTC C0161/C0277 Set (Perform Repair as Outlined) - (Dec 4, 2008)
Subject: Intermittently Brake Lights (Stop Lamp) Do Not Function Correctly, Extended Travel to Shift Out of Park, Cruise Control Inoperative, DTCs C0161/C0277 Set (Perform Repair as Outlined)
Models: 2004-2007 Chevrolet Malibu, Malibu Maxx
2008 Chevrolet Malibu Classic
2005-2009 Pontiac G6
2007-2009 Saturn AURA
Some customers may comment that intermittently the brake lights do not function correctly. Other symptoms may include extended pedal travel required to shift out of PARK, cruise control does not function correctly, and DTC C0161 and/or C0277 may be set.
The most likely cause of this condition is high resistance due to terminal fretting corrosion in the body control module (BCM) C2 connector (specifically pins C2-18, C2-31 and C2-59).
DO NOT replace the BCM for this condition. Disconnecting the C2 connector, adding dielectric silicone grease and reconnecting the C2 connector per the procedure below will correct the high resistance condition due to terminal fretting corrosion.
Remove the right side front floor console side trim panel to access to the Body Control Module (BCM).
Locate the C2 connector on the BCM.
Unlatch the C2 connector and disconnect the C2 connector from the BCM.
Reconnect the C2 connector back on the BCM and re-latch.
Repeat Steps 3 and 4 (this step cleans up the terminal fretting corrosion).
Using the Tech 2®, verify the brake pedal position sensor (BPPS) voltage is between:
• 0.88V - 2.11V (for 2004-2006 model years)
• 0.73V - 1.47V (for 2007-2009 model years)
Check for proper operation of the brake lights.
• If the brakes lights are operating properly, remove the C2 connector again from the BCM and proceed to Step 8.
• If the brake lights are not operating properly, proceed to Step 12.
Apply dielectric lubricant (clear gel) GM P/N 12377900 (In Canada, use P/N 10953529) on the BCM C2 pins (apply with a one-inch nylon bristle brush) on all the C2 connector pins (this will treat the pins against fretting corrosion).
Reconnect the C2 connector back on the BCM and re-latch.
Reinstall the right side front floor console side trim panel.
Using the Tech 2®, check that the BPPS ratio is equal to BPPS learned home when the brake pedal is not depressed.
• If they are equal, brake lamps should be operating correctly and no further steps are necessary.
• If they are not equal, perform the Brake Pedal Position Sensor Calibration procedure in SI to complete the repair.
Check the brake lights for proper operation. If incorrect, refer to SI and perform normal diagnostics. Source(s): gm tech
Posted on Oct 23, 2009
Tips for a great answer:
The IPC detects a loss of serial data communications with the ECM. The automatic transmission shift lock control system is a safety device that prevents an inadvertent shift out of PARK when the engine is running. The driver must press the brake pedal before moving the shift lever out of the PARK position. The system consists of the following components:
The automatic transmission shift lock control solenoid
The automatic transmission shift lock control switch
With the ignition in the ON position, voltage is supplied to automatic transmission shift lock control switch. Voltage flows through the normally closed contacts of the automatic transmission shift lock control switch to the automatic transmission shift lock control solenoid. The automatic transmission shift lock control solenoid is permanently grounded. This energizes the automatic transmission shift lock control solenoid causing the transmission shift lever to be physically locked in the PARK position. When the brake pedal is pressed the contacts in the automatic transmission shift lock control switch open, de-energizing the automatic transmission shift lock control solenoid. This allows the shift lever to be move out of the PARK position.
The transmission range (TR) switch is part of the park/neutral position (PNP) and backup lamp switch assembly, which is externally mounted on the transmission manual shaft. The TR switch contains four internal switches that indicate the transmission gear range selector lever position. The PCM supplies ignition voltage to each switch circuit. As the gear range selector lever is moved, the state of each switch may change, causing the circuit to open or close. An open circuit or switch indicates a high voltage signal. A closed circuit or switch indicates a low voltage signal. The PCM detects the selected gear range by deciphering the combination of the voltage signals. The PCM compares the actual voltage combination of the switch signals to a TR switch combination chart stored in memory.
You need a Tech2 scan tool to diagnose this problem ! possible range sensor !
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