Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 22 other vehicles, including the 1992 GMC Yukon, 1992 GMC Vandura Special, 1992 GMC Vandura, 1992 GMC Value Van, and 1992 GMC Rally Camper Special. However, it is still accessible from the selected car via links, so may be relevant.

With drive wheels turning, scan tester and speedometer reading should closely match.

Fig 1: CODE 24, Schematic, Vehicle Speed Sensor Circuit

Courtesy of GENERAL MOTORS CORP.

Fig 2: CODE 24, Schematic, Vehicle Speed Sensor Circuit

Courtesy of GENERAL MOTORS CORP.

Fig 3: CODE 24, Flow Chart, Vehicle Speed Sensor Circuit

Courtesy of GENERAL MOTORS CORP.