GM Service Manual Online
For 1990-2009 cars only

Checks

Action

TCC control valve (308) and spring (307)

Inspect for wear, sticking, binding or damage. Refer to Control Valve Body Assembly Disassemble .

TCC regulator valve (319) and apply valve spring (320)

Inspect for wear, sticking, binding or damage. Refer to Control Valve Body Assembly Disassemble .

Line limit valve (310) and spring (309)

Inspect for wear, sticking, binding or damage. Refer to Control Valve Body Assembly Disassemble .

Actuator feed limit valve (312) and spring (311)

Inspect for wear, sticking, binding or damage. Refer to Control Valve Body Assembly Disassemble .

Primary limit valve (314) and spring (313)

Inspect for wear, sticking, binding or damage. Refer to Control Valve Body Assembly Disassemble .