GM Service Manual Online
For 1990-2009 cars only

Condition

Possible Cause

No Part throttle or delayed downshift

    â€¢ TV cable out of adjustment, binding or damaged
    â€¢ Throttle valve binding or sticking
    â€¢ 1-2 shift valve binding or sticking
    â€¢ 2-3 shift valve binding or sticking
    â€¢ Primary regulator valve binding or sticking
    â€¢ Broken or distorted valve springs
    â€¢ Damaged or porous valve body casting
    â€¢ Intermediate servo piston binding or sticking
    â€¢ Intermediate servo piston seals cut or damaged
    â€¢ Intermediate servo piston rod binding
    â€¢ 2nd brake band worn or out of adjustment
    â€¢ 1st-reverse brake clutch discs worn
    â€¢ 1st-reverse brake piston or seal leaking or damaged
    â€¢ One-way clutch not holding or damaged