This procedure addresses the replacement of the vehicle speed sensor (VSS), as the 2014-2018 Silverado 1500 uses an electronic speed sensor rather than a traditional speedometer cable.

Warnings

Tools required

Parts

• Vehicle Speed Sensor (VSS) × 1 — ACDelco 213-4514 or equivalent
• O-ring seal × 1 — Usually included with VSS

Preparation

1. Park vehicle on level surface and engage parking brake
2. Place wheel chocks behind front wheels
3. Allow transmission to cool if vehicle was recently driven
4. Disconnect negative battery terminal to prevent electrical issues
5. Raise rear of vehicle and support securely on jack stands
6. Locate the vehicle speed sensor on the driver side of the transmission tailhousing, near the output shaft

Procedure

1. 1

   Disconnect battery
   Loosen and remove the negative battery terminal cable. Secure cable away from battery post to prevent accidental reconnection during repair.
   Torque spec

   Battery Terminal Bolts8 Nm (6 lb-ft)
2. 2

   Access the vehicle speed sensor
   From underneath the vehicle, locate the VSS on the driver side of the transmission extension housing. It will have a single electrical connector and is secured by a bolt. Clean any debris or dirt around the sensor area.
3. 3

   Disconnect electrical connector
   Press the tab on the VSS electrical connector and pull straight out to disconnect. If connector is difficult to remove, use a small flathead screwdriver to carefully release the locking tab. Inspect connector for corrosion or damage.
4. 4

   Remove speed sensor mounting bolt
   Using a 10mm socket with extension, remove the single bolt securing the VSS to the transmission housing. Keep bolt for reinstallation.
   Torque spec

   Mounting Bolts42 Nm (31 lb-ft)
5. 5

   Extract the speed sensor
   Carefully pull the VSS straight out from the transmission housing. It may require gentle twisting to break the O-ring seal. Have a shop towel ready as a small amount of transmission fluid may leak out. Inspect the old O-ring for damage.
6. 6

   Prepare new sensor
   Remove the new VSS from packaging and verify it matches the old sensor. Ensure the new O-ring is properly seated in the groove on the sensor body. Lightly lubricate the O-ring with clean transmission fluid to ease installation.
7. 7

   Install new speed sensor
   Insert the new VSS into the transmission housing bore, ensuring it is fully seated. The sensor should slide in smoothly with light pressure. Align the mounting hole with the threaded bore in the housing.
8. 8

   Secure sensor with mounting bolt
   Install the mounting bolt and tighten to specification using a torque wrench. Do not overtighten as this can crack the sensor housing or damage the transmission case threads.
   Torque spec

   Mounting Bolts42 Nm (31 lb-ft)
9. 9

   Reconnect electrical connector
   Push the electrical connector onto the VSS until it clicks into place. Gently tug on the connector to verify it is fully locked. Ensure no wires are pinched or contacting hot exhaust components.
10. 10

    Reconnect battery
    Reinstall the negative battery terminal cable to the battery post. Tighten the terminal bolt to specification.
    Torque spec

    Battery Terminal Bolts8 Nm (6 lb-ft)

Reassembly

1. Lower vehicle from jack stands carefully
2. Remove wheel chocks
3. Check transmission fluid level if significant fluid was lost during sensor removal
4. The PCM may need to relearn idle and driving characteristics after battery disconnection

Verification

• Start the engine and verify no check engine light or warning messages appear on the instrument cluster
• Observe the speedometer reads 0 mph with vehicle stationary
• Test drive the vehicle and verify speedometer operates correctly at various speeds
• Verify odometer is accumulating mileage during test drive
• Check that cruise control operates properly if equipped
• Inspect under vehicle for any transmission fluid leaks around the VSS after test drive
• Use a scan tool to verify no speed sensor related diagnostic codes are present

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