No Torque Converter Clutch (TCC) Apply

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Checks	Cause
TCC Shift Solenoid Valve (323)	Stuck Off O-ring failed No voltage to the solenoid Poor connection
PCM	Failed No signal to the solenoid
Brake Switch	The contact is corroded. Poor connection Pinched wire Misadjusted No supply voltage
TCC Valve (223)	The valve is stuck Off due to sediment or to an undersized bore.
Retainer Pin (211)	Broken
Torque Converter (1)	Ballooning
Turbine Shaft (502)	Plugged oil holes
Turbine Shaft Seals (501)	Ineffective
Pump Body Bushing (202)	Worn
O-ring (2)	Heat set
Oil Transfer Hole Cup Plug	Leaking
Regulated Apply Valve (324)	Stuck
TCC Valve Release Exhaust Orificed Cup Plug	Blocked
Check PCM for the current DTCs.
Refer to Incorrect Torque Converter Clutch (TCC) Apply or Release .