GMC 24203876 Sensor,Speed Input & Output

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The 4L60-E and 4L65-E transmissions have their VSS located on the right side of the extension housing. However, both of the 4L80-E and 4L85-E transmissions do not use VSS, instead, they have Input Shaft Speed (ISS) and Output Shaft Speed (OSS) sensors. Disconnecting the cable at its negative battery terminal is important. To prevent rolling and slipping off, put the vehicle on jack stands after lifting it. In case of oil spills while working with the vehicle speed sensor, keep a drain pan beneath it. The electrical connector should be detached from the Vehicle Speed Sensor. For removal of VSS remove the electrical connector as well as sensor mounting bolt. After that remove VSS mounting bolt and extract VSS from transmission. If you want to remove a VSS in this situation, you can grab it tightly then move it back and forth while removing it out of transmission. In case VSS has O-ring, ensure that you check whether it is torn or worn out so that you can replace it if need be. Replace if damaged. When installing a new VSS replace the O-ring even if old one looks fine here. Reinstallation is simply done by reversing what was done during removal process for installation purposes. Therefore, fill up transmission fluid up to required level after inspection process is over.

A defective VSS can cause driveability and transmission problems.

Use jackstands to securely support the vehicle after raising it.

To replace the sensor, raise the vehicle and disconnect the electrical connector. Remove the mounting bolt and withdraw the VSS from the transmission case. Replace the sensor O-ring and then reinstall the VSS, following the reverse of the removal process.

This manual covers models with various electric-shift transfer cases and different combinations of speed sensors.

When installing the VSS, a new O-ring should be used, even if the old VSS sensor is being reused.

Yes, the procedure for checking and replacing the output shaft speed sensor is similar to that of the VSS.

After raising the vehicle, the electrical connector should be disconnected from the VSS.

This manual covers models with various electric-shift transfer cases and different combinations of speed sensors.

On 4WD models, the VSS should be unscrewed using a deep socket.

This manual covers models with various electric-shift transfer cases and different combinations of speed sensors.

When installing the VSS, a new O-ring should be used, even if the old VSS sensor is being reused.