GM Tech Tip: Squeak Noise On Brake Pedal Application – UnderhoodService

GM Tech Tip: Squeak Noise On Brake Pedal Application

Some customers may comment on a squeak noise when the brake pedal is applied or when released. This noise is normally heard when the brake pedal is slowly applied with the engine on or off, but can occur when the brake pedal is released. The noise may be isolated to the master cylinder area.

Models
• 2004-2007 Buick Rainier
• 2008 Buick Enclave
• 2004-2008 Chevrolet Colorado, TrailBlazer
• 2008 Chevrolet Malibu
• 2009 Chevrolet Malibu
• 2004-2008 GMC Canyon, Envoy, Envoy XL, Envoy XUV
• 2007-2008 GMC Acadia
• 2008 Pontiac G6
• 2009 Pontiac G6
• 2007-2008 Saturn Outlook
• 2008 Saturn Aura
• 2005-2008 Saab 9-7X

Condition

Some customers may comment on a squeak noise when the brake pedal is applied or when released. This noise is normally heard when the brake pedal is slowly applied with the engine on or off, but can occur when the brake pedal is released. The noise may be isolated to the master cylinder area.

Correction
To correct this concern, remove as much of the old brake fluid from the master cylinder as possible and refill with a new DOT 3 brake fluid, P/N 88862806 (in Canada, use P/N 88862807). Start the vehicle and fully cycle the brake pedal until the noise diminishes to allow the new fluid to enter the system.

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