Vehicle Speed Sensors: Notes
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Savana Special, 2003 GMC Savana Camper Special, 2003 GMC Savana, 2003 Chevrolet RV Cutaway, and 2003 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The output speed sensor procedure is for 2WD vehicles. If the vehicle is equipped with 4WD, the output speed sensor is located on the transfer case.