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 those at the transmission pass-thru connector. Fault may be an internal transmission problem.

Fig 1: CODE 87, Schematic, Shift Solenoid "B" Stuck "OFF"

Courtesy of GENERAL MOTORS CORP.

Fig 2: CODE 87, Flow Chart, Shift Solenoid "B" Stuck "OFF"

Courtesy of GENERAL MOTORS CORP.