Where is speed sensor

@richardgbutton you are not giving us a lot to work with. Your Tahoe has two, a Transmission Input speed sensor and a Vehicle Speed sensor (not including the ABS speed sensors). To determine the location of either, the engine size would be needed as well. If you are looking for the Transmission Input speed sensor then we would also need to know it is is a 4X4.

Anyhow, the Vehicle Speed Sensor is on the left side on the "tail" of the transmission

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