GM Service Manual Online
For 1990-2009 cars only

Condition

Action

Incorrect speed sensor readings

See speed sensor DTCs.

Incorrect fluid level

Correct the fluid level Transmission Fluid Check .

Main pressure low

Repair the transmission.

TCC clutch not applied

Inspect the torque converter clutch system wiring, pressure, and controls. Repair as necessary.

Ranges 1, 2, 3, 4 Only

1-2-3-4 clutch slipping, leaks at splitline gasket, leaks at rotating clutch seals, leaks at piston seals, 1-2-3-4 clutch plates worn

Inspect the control module gasket, 1-2-3-4 clutch plates, and piston and rotating seals. Replace/rebuild as necessary.

Ranges 4, 5 Only

4-5 clutch slipping, leaks at splitline gasket, leaks at rotating clutch seals, leaks at piston seals, 4-5 clutch plates worn

Inspect the control module gasket, 4-5 clutch plates, and piston and rotating seals. Replace/rebuild as necessary.

Ranges 3, 5, R Only

3rd, 5th and reverse clutch slipping, leaks at piston seals, 3rd, 5th and reverse clutch plates worn

Inspect the 3rd, 5th and reverse clutch plates and piston seals. Replace/rebuild as necessary.

Range 2 Only

2nd clutch slipping, leaks at piston seals, 2nd clutch plates worn

Inspect the 2nd clutch plates and piston seals. Replace/rebuild as necessary.

Ranges 1, R Only

Low and reverse clutch slipping, leaks at piston seals, low and reverse clutch plates worn

Inspect the low and reverse clutch plates and piston seals. Replace/rebuild as necessary.