GM Service Manual Online
For 1990-2009 cars only

Condition

Possible Cause

Slips in 1st gear

    • Low fluid level
    • TV cable out of adjustment, binding or damaged
    • Shift select cable out of adjustment, biding or damaged
    • Throttle valve binding or sticking
    • Primary regulator valve binding or sticking
    • Accumulator(s) pistons damaged or leaking
    • Accumulator(s) seals cut or damaged
    • Accumulator(s) broken or distorted springs
    • Forward clutch discs worn
    • Forward clutch piston or seal leaking or damaged
    • Forward clutch input shaft O-rings cut or damaged
    • Incorrect line pressure