SOURCE: 03 silverado neutral safety switch
possible but it can also be a range selecter switch problem. any work done on vehicle lately? pleas respone and i will try my best to help thanks.
SOURCE: 1995 Chevy S10 Blazer will not go into park.
theres a shift cable if its floor model,linkage for column model.
SOURCE: transmission will not shift
Check the Vehicle Velocity Sensor (V V S)-(Speed Sensor) or the wire harness to the VVS. IF the ECM is not getting a signal from the V V S, the PCM can not give the signal to switch gears. The V V S is on the drivers side of the end ot the transmission that is held on by one bolt. Best thing to do is to have the truck scanned at Auto Zone for a DTC code and to confirm that the V V S has gone bad and they can give you the step by step instruction to replacing the sensor and takes about 15 min to do. Good luck and keep me posted. Keep an eye on the transmission fluid, make sure you don't run the transmission to hard and burn it out over a $40.00 sensor which is better then $1,800 for a transmission replacement.
SOURCE: Transmission wont shift
Start by checking the transmission fluid level. Check it in park with the engine running.
Since this happened while you were driving I would bet that it is not a shift linkage problem and if the fluid level is fine your transmission may need repair or replacement.
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The automatic transmission shift lock control switch.
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The park/neutral safety switch.
With the ignition in the ON position, battery positive voltage is supplied to the automatic transmission shift lock control switch. The circuit continues through the normally-closed switch to the automatic transmission shift lock control solenoid. The park/neutral safety switch provides a path to ground for the automatic transmission shift lock control solenoid in the PARK position. This energizes the automatic transmission shift lock control solenoid, mechanically locking the shift linkage in the PARK position. When the driver presses the brake pedal the contacts in the automatic transmission shift lock control switch open, causing the automatic transmission shift lock control solenoid to de-energize. This allows the shift lever to move from the PARK position. When the shift lever is out of the PARK position the contacts in the neutral safety switch open and the automatic transmission shift lock control solenoid is de-energized.
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