GM Service Manual Online
For 1990-2009 cars only

Checks

Cause

TCC Circuit

Blockage during apply or release

TCC Valve Spring (224)

The spring is broken.

Pump Cover (206)

Cross channel leakage

Pressure Regulator Valve (231)

The valve is stuck in a high demand position.

Oil Cooler

The cooler or the cooler lines are blocked.

Gasket (6)

The gasket is damaged.

Retainer Pin (211)

The pin is broken.

Turbine Shaft O-ring (2)

The O-ring is damaged.

Turbine Shaft Seals (503)

The seals are damaged.

Stator Shaft Bushing (233)

The bushing is worn or damaged.

Oil Transfer Hole Cup Plug

The plug is leaking.

Fluid

The fluid level is low.

Radiator

Air flow is restricted.