I have a 1996 Corvette 6 speed manual transmission which requires you to depress the clutch pedal to engage the ignition. Once in the past two weeks (this hasn't happened since), I had symptoms seemingly related to clutch pedal switch. After about ten minutes of no sound turning the key, the car finally started. If this is the problem, step by step instructions to replace the switch would be helpful. Or, is it possible this is not going to happen again? Thank you, Dave

U need a new clutch, period.

MULTI-MODE MANUAL TRANSAXLE SYSTEM ADJUSTMENT
1. USING INTELLIGENT TESTER: CLAMP POSITIONADJUSTMENT (CLUTCH POSITIONADJUSTMENT)
Tech Tips
The multi-mode manual transmission system has a load controlled clutch cover (adjustment system). The pressure plate moves depending on the wear
condition of the clutch disc lining.
When removing or installing any parts related to the multi-mode manual transmission system, move the clutch actuator to the clutch clamp position. This is
for normal operation of the load controlled clutch cover (adjustment system).
If the clutch position adjustment operation input fails, perform the operation again from step (a) more than 15 seconds after turning the ignition switch off.
Note
Do not depress the brake pedal while performing the clamp position adjustment using an intelligent tester.
a. Prepare the vehicle:
Stop the vehicle.
Shift the lever into the N position.
Turn the ignition switch off.
Apply the parking brake.
b. Connect the intelligent tester to the DLC3.c. Turn the ignition switch on (IG).
d. Turn the intelligent tester ON.
e. Select the following menu items: Powertrain / Multi-Mode M/T / Utility / Parts Exchange.
f. Read the information.
g. Press the Next key.
h. Read the information.i. After checking the vehicle condition, press the Next key.
j. Read the information.
k. Press the Next key.
l. Read the information.m. Press the Next key.
n. On the Multi-Mode M/T / Utility screen, select Step 1 Clutch Position Adjustment (Clamp Position Adjustment).
o. Press the Next key.
p. Read the information.q. Press the Next key.
r. Complete Clutch Position Adjustment.
s. Turn the intelligent tester OFF.
t. Turn the ignition switch off.
u. Replace the malfunctioning parts.
Tech Tips
Perform [Initialization and Learning] after repairing the multi-mode manual transmission control system .
2. WITHOUT USING INTELLIGENT TESTER: CLAMP POSITIONADJUSTMENT (CLUTCH POSITIONADJUSTMENT)
Tech Tips
The multi-mode manual transmission system has a load controlled clutch cover (adjustment system). The pressure plate moves depending on the wear
condition of the clutch disc lining.
When removing or installing any parts related to the multi-mode manual transmission system, move the clutch actuator to the clutch clamp position. This is
for normal operation of the load controlled clutch cover (adjustment system).
If the clutch position adjustment operation input fails, perform the operation again from step (a) more than 15 seconds after turning the ignition switch off.a. Prepare the vehicle.
Stop the vehicle.
Shift the lever into the N position.
Turn the ignition switch off.
Apply the parking brake.
b. Using SST, connect terminals TC and CG of the DLC3
SST
09843-18040
c. Turn the ignition switch on (IG) with the brake pedal released.
d. Depress the brake pedal 7 times or more within 3 seconds.i. The buzzer sounds twice with an interval of 0.25 seconds.
e. Depress the brake pedal.
f. Shift the shift lever in the following sequence with the brake pedal depressed: N?E?M?+?M?+?M?+?M?+?M?E?N.
g. Release the brake pedal.
h. Depress the brake pedal again.i. The buzzer sounds at intervals of 0.5 seconds as follows (an interval of 2.5 seconds exists between each cycle).
Once when adjusting the clutch clamp position (one cycle)
Tech Tips
If the buzzer does not sound at this time, wait at least 15 seconds after turning the ignition switch off. Then, perform the procedure from step
(a) again.
i. Depress the brake pedal 3 times or more within 2 seconds.
i. The buzzer sounds twice with an interval of 0.25 seconds.
j. Depress the brake pedal.
k. Shift the shift lever to the [-] position with the brake pedal depressed.
l. Release the brake pedal.
m. Complete clutch position adjustment.
n. Turn the ignition switch off and wait at least 10 seconds.
o. Disconnect the SST from terminals TC and CG of the DLC3.
p. Repair the malfunctioning parts.Tech Tips
Perform [Initialization and Learning] after repairing the multi-mode manual transmission control system .

transmission synchronizers most common cause of transmisson noise in certain gears, and not others, might want to check the gear oil level. Transmission rebuild required. To read about them and what they actually do, then here is a good read:
When you shift gears in your standard shift car, you move a rod that moves a fork that engages the gear. Depending which gear you're shifting to, a different fork does the job. The fork moves the collar to the desired gear, and dog teeth on the collar mesh up with holes on the gear in order to engage it. You engage reverse gear through a separate, small idler gear. The reverse gear always turns in the opposite direction of the other (forward) gears.
In years past, double-clutching was common in order to disengage a gear, allow the collar and next gear to reach the same speed, and then to engage the new gear. To double-clutch shift, you pushed the clutch pedal to free the engine from the transmission. Then the collar moved into neutral. You released the clutch and revved the engine to get it to the right rpm value for the next gear so the collar and the next gear spun at the same rate to allow the dog teeth to engage the gear. When the engine hit the right speed, you depressed the clutch again in order to lock the collar into place on the next gear.
Modern cars use synchronizers in order to avoid the need for double-clutching. A synchronizer, or "synchro," lets the collar and gear synchronize their speeds while they're already in contact but before the dog teeth engage. Each manufacturer's synchro is slightly different than the others, but the basic idea is the same. For instance, a cone on one gear will fit into a cone-shaped depression on the collar. The gear and collar synchronize their speeds thanks to the friction between the cone and collar. Then the outer part of the collar moves out of the way so that the gear can be engaged by the dog teeth.

check the fluid in the clutch system (if hydraulic) (replace cable if manual). Bleed air out of system replace the clutch master cylinder.

Clutch plate and pressure plate seem to be too weak to pull the car. To test the clutch plate, park the car on flat surface. Pull the hand brake up, start the car, depress the foot brake pedal, depress the clutch pedal, put the car in 1st gear, press the gas pedal and leave the clutch pedal at once, while keeping the brake pedal depressed.
Follow one of the two following statements:
1. Engine does not shut down and remain start. (Clutch plate, pressure plate and clutch bearing defective - Replace all as a set)
2. Engine shuts down. (Clutch system is OK and does not require any repair).

There should be two switches on your clutch pedal that interrupt the starter. If both of those prove to be working, then look at the starter relay.

Engage two wheel drive. Switch on the ignition. Pull out the choke? Engage second gear and release the hand brake. Depress the clutch pedal and get the vehicle up to about 6-8 mph. Release the clutch and the engine should be turned by the rotation of the wheels - and hopefully start. Once the engine has caught, depress the clutch and keep the engine running in the normal manner.

Your truck has a hydraulic clutch, check to see fluid is full in the clutch master cylinder, and see if fluid is leaking at the line or the slave cylinder, line could have broke, or master/slave cylinder needs replaced.

Under hood next to master brake cylinder.it dos sound like a clutch / or clutch fluid problem / there will be a black rubber in it that you have to remove to add fluid / it is round / hope this helped Good Day.

The vehicle is fitted with a clutch switch for safety purposes, that is why the vehicle won't start without pressing the clutch. The cause of the engine stalling might be that the cold start ignition/ timing advance does not work as it is supposed to