Question about 2005 Chevrolet Uplander
Hello, sounds like you need to change the switch, sounds like the switch is going bad, because it is taking time to let you put your car in gear, soon as you put foot on brake the switch should activate, almost immediatley, then put the car in gear, i had a nissian , that did this, went to junkyard, bought used one for 20.00. new one was about 50.00. still working today.
Posted on Feb 06, 2010
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Posted on Jan 02, 2017
Tips for a great answer:
The body control module (BCM)
The powertrain control module (PCM) or the transmission control module (TCM).
The BCM controls the voltage to the shift lock control solenoid through the shift lock control solenoid controlled voltage circuit. The following conditions must be met before the BCM will supply voltage to the shift lock solenoid:
The ignition is in the ON position.
The PCM / TCM sends an input to the BCM indicating the transmission is in the PARK position.
The BCM determines the brake pedal is not applied according the brake pedal position.
Since the shift lock control solenoid is permanently grounded, the BCM supplies voltage to the automatic transmission shift lock control solenoid, mechanically locking the shift lever in the PARK position as the solenoid energizes. When the brake pedal is applied, the BCM turns the control voltage output of the shift lock control solenoid OFF, de-energizing the shift lock control solenoid. The de-energized solenoid releases the mechanical lock allowing the driver to move the shift lever out of the PARK position. When the transmission is out of the PARK position, the shift lock control solenoid remains de-energized.
The body control module (BCM) controls the A/T shift lock control solenoid by providing battery voltage to the A/T shift lock control solenoid. The BCM utilizes a smart driver to control the voltage supplied to the A/T shift lock control solenoid. The smart driver monitors the voltage and current flow of the control circuit.
This diagnostic procedure supports the following DTC:
DTC B2705 Gearshift Unlock Circuit
You could have a bad brake light switch , automatic transmission shift lock control solenoid.
the BCM or wiring problem
Install a scan tool. Turn ON the ignition, with the engine OFF. Press and release the brake pedal several times while observing the BTSI solenoid parameter in the body control module (BCM) output data list
Jan 17, 2016 | Chevrolet Cars & Trucks
Please check if your seat belt has "Retractors" or "Automatic Retractor".
Follow these steps to determine if you have a retractor system that will hold car seat securely or your seat belt won't retract as should be:
A. Pull belt all the way out.
b. Allow belt to retract about 6 inches (15 cm).
c. Pull out on belt again.
If belt is locked and you cannot pull the belt out any further, you have an Automatic Locking;
If you pull the belt again all the way out and won't return to normal operation, then the mechanism is damaged, but try first the "retractor" lock to be sure. By Federal Law, nobody will sale a seat belt in a junk yard, try the dealer or order thru the dealer the whole seat belt or the mechanism. I hope that is just a matter of the automatic retractor; you can see this information in your car's manual. Try and we will see.
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