Excessive Slippage and Clutch Chatter

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.

Condition	Action
Incorrect speed sensor readings	See speed sensor DTCs.
Incorrect fluid level	Correct the fluid level Transmission Fluid Checking Procedure .
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.