Ignition key tumbler switch?

Here are the instructions in the diagrams below to show you how on your car. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

Ignition lock cylinder needs removed. To do so, perform following operations.

Remove the steering wheel.
Remove the turn signal switch. It is not necessary to completely remove the switch from the column. Pull the switch rearward far enough to slip it over the end of the shaft, but do not pull the harness out of the column.
Turn the lock to Run.
If necessary, remove the ignition key.
If equipped, remove the buzzer switch assembly.
Remove the lock retaining screw and remove the lock cylinder.
Rotate the key to the stop while holding onto the cylinder.
Push the lock all the way in.
Install the screw. Tighten the screw to 40 inch lbs. (5 Nm) for regular columns, 22 inch lbs. (2.5 Nm) for tilt columns.
Install the turn signal switch and the steering wheel.

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Sorry about that, I edited above post to removing lock clyinder, not switch. Thanks Bowtie Baby.

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REMOVAL:
Remove steering wheel and turn signal switch.
It is not necessary to completely remove the turn signal switch. Pull the switch over the end of the shaft; no further.

Place lock cylinder in RUN position.
Do not remove the ignition key buzzer.

Insert a small drift pin into the turn signal housing slot. Keeping the drift pin to the right side of the slot, break the housing flash loose and depress the spring latch at the lower end of the lock cylinder. Remove the lock cylinder.
WARNING
Considerable force may be necessary to break this casting flash, but be careful not to damage any other parts. When ordering a new lock cylinder, specify a cylinder assembly. This will save assembling the cylinder, washer, sleeve and adapter.

INSTALLATION:
Hold the lock cylinder sleeve and rotate the knob clockwise against the stop.
Insert the cylinder into the housing, aligning the key and keyway.
Hold a 0.070 in. Drill between the lock bezel and housing. Rotate the cylinder counterclockwise, maintaining a light pressure until the drive section of the cylinder mates with the sector.
Push in until the snapring pops into the grooves. Remove drill. Check cylinder operation.
The drill prevents forcing the lock cylinder inward beyond its normal position. The buzzer switch and spring latch can hold the lock cylinder in too far. Complete disassembly of the upper bearing housing is necessary to release an improperly installed lock cylinder.

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First has it been modified? If so look for burnt fusible links normally around starter. Then start by checking to see if junction box going through firewall is connected and not burnt up due to age. Check wires leading behind motor on passenger side not being caught or bunt up from manifold and or pinched between trans/block. Check ground from battery to body and body to engine shold be one from valve cover to body pass side or block to firewall

Hmac300,

I'M GOING WITH THE SUPER EZ STUFF!

STUFF THAT IS TAKEN FOR GRANTED

SEE MY "OLE RELIABLE" ANSWER IN THE POST OF THE PAST (KEEPS ME FROM PECKING IT OUT ALL OVER AGAIN)

https://www.2carpros.com/questions/1996-chevrolet-tahoe-wont-start-sounds-dead-battery-jumpbox-get-same-reults

I MADE A FEW PICS AT THE END OF IT TOO!

Gummere, RETURN BACK HERE WITH SOME GOOD NEWS!

THE MEDIC

WHATU WAITING ON!

THE OLE BURNT WIRE MIGHT HAVE A BURNT CONNECTION

IN OTHER WORDS, THE CONNECTION MIGHT NOT BE MAKING CONTACT, EVEN THOUGH IT'S STILL TOGETHER DUE TO THE OVERHEATING

OR THE BAD/ INTERMITTENT CONNECTION MAY HAVE CAUSED THE WIRE TO OVERHEAT AND COOK THE INSULATION, MAYBE THE WIRE IS IN HALF INSIDE THE INSULATION

THIS IS WHERE YOU TAKE THE CONNECTIONS APART, REPLACE DAMAGED STUFF, OR SAND THE CONNECTORS SO THEY MAKE GOOD CONTACT AGAIN.

WHILE TESTING, YOU MIGHT LOOSEN THE CONNECTION(S) A LITTLE BIT AND "SCOOCH" THE RINGS/ FORK/ ETC AROUND A LITTLE BIT, IN HOPES THAT IT WILL MAKE CONTACT (FOR A SECOND OR TWO ANYWAY) SO YOU WILL KNOW YOU HAVE FOUND THE "PROBLEM CHILD"!

THE MEDIC