GM Service Manual Online
For 1990-2009 cars only

If wander or poor steering stability exists, inspect for the following conditions:

    • Mismatched or uneven tires
    • Incorrect front or rear wheel alignment
    • Inadequate lubrication of ball joints or tie rod ends
    • Worn tie rod ends
    • Worn ball joints
    • Worn strut dampers
    • Broken or sagging springs
    • Loose stabilizer shaft
    • Incorrect power steering fluid pressure
    • Loose rack and pinion gear attaching bolts
    • Worn or binding rack and pinion gear
    • Worn steering column friction damper
    • If hard steering or lack of assist exists, inspect for the following conditions:
      • Magnasteerâ„¢ system malfunction (at low speeds). Refer to Electrical Diagnosis.
      • Insufficient power steering fluid pressure
      • Excessive rack and pinion gear rack bearing preload
      • Stiff pinion spool valve assembly
      • Worn or binding upper strut mount bearings
      • Worn or binding rack and pinion gear
    • If soft steering at high speeds exists, inspect for a Magnasteerâ„¢ system malfunction. Refer to Electrical Diagnosis.

If erratic steering assist exists, inspect for the following conditions:

    • Magnasteerâ„¢ system malfunction, refer to Electrical Diagnosis
    • An intermittent vehicle speed signal

If erratic steering exists when braking, inspect for the following conditions:

    • Worn strut dampers
    • Broken or sagging springs
    • Damaged master cylinder primary or secondary cups
    • Leaking wheel cylinder or caliper
    • Loose or binding caliper
    • Loose control arm bolt

If too much play in the steering exists, inspect for the following conditions:

    • Loose rack and pinion gear attachment
    • Worn or loose steering intermediate shaft coupling
    • Rack and pinion gear rack bearing preload below minimum

If poor steering wheel return exists, inspect for the following conditions:

    • Inadequate lubrication of ball joints and tie rod ends
    • Binding ball joints
    • Binding in steering column (including steering column friction damper)
    • Incorrect front wheel alignment
    • Excessive rack and pinion gear rack bearing preload
    • Sticking pinion spool valve assembly
    • Worn or binding upper strut mount bearings