Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 24 other vehicles, including the 1992 GMC Yukon, 1992 GMC Vandura Special, 1992 GMC Vandura, 1992 GMC Value Van, and 1992 GMC Suburban. However, it is still accessible from the selected car via links, so may be relevant.

Check all connections, especially at the transmission pass-thru connector. If code is intermittent, see INTERMITTENTS in TESTS W/O CODES article.

Fig 1: Output Speed Sensor Circuit Check, Schematic, (4WD)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Output Speed Sensor Circuit Check, Flow Chart, (4WD)

Courtesy of GENERAL MOTORS CORP.