My key is stuck in the lock position. When I first started my truck it started with no problems and then when I switched keys to the key that came with the truck it won't turn or come on. Now I can't pull the key out
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The alternator wouldn't have anything to do with either of the problems your having ! The key getting stuck in the ignition could be a problem developing with the lock cylinder . Can you turn the key to the off position an then it won't come out ? Or it won't turn to the off position an then not come out ? There are safety devices in place that won't let the key come out if not in gear an foot on the brake pedal etc... electronic an they do fail . Electronic Park Lock (EPL)/Ignition Lock Cylinder Control Actuator:Linear Shift Assembly: If the vehicle is equipped with a column mounted gear shift, it has a linear shift assembly on the steering column. The linear shift assembly has a cable that runs from the linear shift assembly to the ignition lock cylinder case. The purpose of this cable is to prevent the ignition key from being turned to the OFF position when the transmission is in gear and the vehicle may still be moving. The linear shift assembly cable contains a pin that is spring loaded to mechanically prevent the ignition key cylinder from being turned to the lock position when the vehicle transmission is not in the PARK position. If vehicle power is lost, and/or the transmission is not in the PARK position the operator will not be able to turn the ignition key to the lock position and will not be able to remove the ignition key from the column.
Now for the stall at stops , Your vehicle has Throttle Actuator Control (TAC) System ,electronic throttle control or drive by wire ! It is electronical controlled .
There are sensors in the gas pedal an on the throttle body ,they are connected to the PCM/ECM - engine computer with wiring ! There is a DC electric motor on the throttle body , this is what opens the throttle plate . Throttle plates do become dirty with varnish an stuff that can cause idle problems ! There are videos on youtube showing how to clean a throttle plate . How to Clean Throttle Body 2007 Chevy Trailblazer
In the fuse block under the drivers side rear seat check the ignition 0 fuse. In the under hood fuse block check the B/U fuse and the BTSI fuse.
If the b/u fuse is blown than you would not have back up lamps.
Sounds like you need a new ignition switch, not the one that the key goes into, but the actual ignition switch....it's black and it's located on the bottom of the column. Pretty easy job, and is common to go out.
To remove your key....your year had a hole in the plastic, on the bottom side of the steering column, just below the key......some may have been filled or not done at all. Some have an outline of a hole that can be drilled or cut out. Either way, this is an access hole to the solenoid to remove your key. Press this in and your key will come out.
unplug the electrical connector to the igntion coil will make the car to quit running.
I think it's a mechanical problem with the ignition lock cylinder. it's required to remove the steering wheel to get to the igntion lock cylinder.
at least get the car to quit running so you can try to get the key to turn by keep on turning the key and move the shifter and tap the brake at the same time. hope it will get loose some how. good luck
try and turn your steering wheel a little bit left or right and and the same time try and turn the key when it turns toward the dash then try and turn the key back. try and repeat this several times if neccessary. this should work. please rate this solution. thanks
under the steering column, there are three or four little holes in the plastic covering. If you look inside, one of them (the one on the right side toward the dash) there is a brass pin inside. This is the pin to release the key. As far as the key not turning, I have had the same problem. The first time I replaced the ignition switch and that solved the problem. However, this makes no sense because the ignition switch has nothing to do with the tumbler being locked. GMC thinks that my anti theft system, which is inside the ignition cylinder is the problem. By removing the ignition switch, it reset the pass lock anti-theft system and temporarily fixed the problem. So, try removing the ignition switch and then plugging it back in. If that doesn't work, your in the same boat as I am, and we may both need new ignition cylinders.