Diagnostic Aids

If TCC is mechanically stuck on, vehicle speed is zero, brakes are applied and "D2" is selected, TCC fluid will mechanically apply TCC, causing engine to stall.

Fig 1: DTC 69 Schematic - 1994

Courtesy of GENERAL MOTORS CORP.

Fig 2: DTC 69 Flow Chart - 1994

Courtesy of GENERAL MOTORS CORP.