Vehicle Speed Sensor (VSS) Adaption (As Of 2/98)

After replacing an Engine Control Module (ECM), Crankshaft Position (CKP) sensor, starter ring gear or motor mount, sensor adaptation must be performed. Run engine until coolant temperature is more than 158°F (70°C). Drive vehicle. With gear selector in position 3, increase engine speed to approximately 2100 RPM, then hold a 50 percent engine load for approximately 30 seconds. Using scan tool, verify VSS adaptation has occurred.