GM Service Manual Online
For 1990-2009 cars only

Rattle or Knock Noise in Steering Pump for Pontiac Matiz 2005

Checks

Actions

Contaminated air in the power steering fluid.

Bleed the power steering system.

Improperly contacted power steering hose with the body.

Secure the pump hose in a clamp away from the body.

Insufficient power steering fluid level

Fill the power steering pump reservoir.

Improperly installed pump mounting

Tighten the power steering pump attachment bolts.