Code 69, Torque Converter Clutch Stuck On: Notes

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 1994 GMC Yukon, 1994 GMC Suburban, 1994 GMC Pickup, 1994 GMC Cab & Chassis, and 1994 GMC C3500 HD. However, it is still accessible from the selected car via links, so may be relevant.

The PCM commands the TCC PWM solenoid on by modulating the signal fluid on the converter clutch shift valve. The TCC apply fluid applies the torque converter clutch.

NOTE: Test numbers refer to numbers on diagnostic chart.

Checks the mechanical state of the TCC. When the TCC is commanded off, the slip speed should increase.