2004 corvette 6 speed. Where is the speed and miles sender?

Hey Sam how's it going ? How does the car run , does the transmission shift good , is the service vehicle soon light on or check engine ? The reason I ask this is because the VSS - vehicle speed sensor is a input to the PCM - powertrain control module .
Speedometer
The IPC displays the vehicle speed based on the information from the vehicle speed sensor. The PCM converts the data from the vehicle speed sensor to a 4000 pulses/mile signal. The IPC uses the vehicle speed signal circuit (4000 pulses/mile) from the PCM in order to calculate the vehicle speed. The speedometer defaults to 0 km/h (0 mph) if a malfunction in the vehicle speed signal circuit (4000 pulses/mile) exists. The speedometer displays either miles or kilometers as requested by the activation of the English/metric button on the driver information center (DIC). The associated indicator (MPH or KM/H) illuminates.
1
Did you perform the IPC Diagnostic System Check?
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Go to Step 2
Go to Diagnostic System Check - Instrument Cluster

2

1. Install a scan tool.
2. Raise the vehicle's drive wheels. Refer to Lifting and Jacking the Vehicle in General Information.
3. Start the engine.
4. Place the transmission into drive for automatic transmission and third gear for manual transmission.
5. With the scan tool, observe the Vehicle Speed parameter in the PCM Engine Data 1 data list.

Does the Vehicle Speed parameter match the speedometer display?
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Go to Step 3
Go to Step 4

3

Does the odometer operate properly?
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Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
Go to Step 8
4

1. Turn the ignition OFF.
2. Disconnect the PCM connector C2.
3. Turn the ignition ON, with the engine OFF.
4. Measure the voltage from the vehicle speed signal circuit to a good ground.

Does the voltage measure greater than the specified value?
9.6 V
Go to Step 6
Go to Step 5

5

Test the vehicle speed signal circuit for an open, a short to ground, or a high resistance between the IPC and the PCM. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
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Go to Step 10
Go to Step 7

6

Inspect for poor connections at the harness connector of the IPC. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
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Go to Step 10
Go to Step 8

7

Inspect for poor connections at the harness connector of the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
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Go to Step 10
Go to Step 9

8

Replace the IPC. Refer to Instrument Cluster Replacement .
Did you complete the replacement?
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Go to Step 10
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9

Important: Program the replacement PCM.
Replace the PCM. Refer to Powertrain Control Module Replacement in Engine Controls.
Did you complete the replacement?
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Go to Step 10
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Operate the system in order to verify the repair.
Use the scan tool in order to clear the DTC's that may have set in other modules during diagnosis.
Did you correct the condition?
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System OK
Go to Step 2
Rather then replace the VSS an have it operate the same way , take it to a ASE certified repair facility or the dealer . I'm a Chevy certified tech. The odds of the VSS being the problem is next to zero , I would bet on a stepper motor being bad !

How to repair GM Instrument Cluster Speedometer Gauge Stepper

Behind the transmission output shaft