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. Refer to 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 rotating clutch seals, leaks at piston seals, 1-2-3-4 clutch plates worn

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

Ranges 4, 5, 6 Only

4-5-6 clutch slipping, leaks at rotating clutch seals, leaks at piston seals, 4-5-6 clutch plates worn

Inspect the 4-5-6 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, 6 Only

2-6 clutch slipping, leaks at piston seals, 2nd clutch plates worn

Inspect the 2-6 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.