Buick Regal: Brake Pulsation
WARNING: Brake fluid may irritate eyes and skin. In case of contact, take the following actions:
- Eye contact - rinse thoroughly with water.
- Skin contact - wash with soap and water.
- If ingested - consult a physician immediately.
CAUTION: Brake fluid will damage electrical connections and painted surfaces. Use shop cloths, suitable containers, and fender covers to prevent brake fluid from contacting these areas. Always re-seal and wipe off brake fluid containers to prevent spills.
CAUTION: Avoid spilling brake fluid on any of the vehicle's painted surfaces, wiring, cables or electrical connectors. Brake fluid will damage paint and electrical connections. If any fluid is spilled on the vehicle, immediately flush the area with water to minimize the potential for damage.
CAUTION: Power steering fluid, engine oil, brake fluid, or any mineral based fluids cannot be mixed. If brake seals contact power steering fluid or steering seals contact brake fluid, seal damage will result.
NOTE:
- Do not reuse the brake fluid collected during the hydraulic brake system bleeding
- Always store brake fluid in a closed container.
- Reseal brake fluid containers immediately after use.
- Do not use brake fluid left in an open container.
- Do not use brake fluid left in an improperly sealed container.
- Do not use the following fluids in the hydraulic brake system:
- Power steering fluid
- Automatic transmission fluid
- DOT 5 silicone hydraulic brake fluid
For the correct brake fluid, refer to Adhesives, Fluids, Lubricants, and Sealers.
BRAKE SYSTEM NOISE
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BRAKING ACTION UNEVEN - PULLS TO ONE SIDE
Test Description
The numbers below refer to the step numbers in the diagnostic table.
4
Suspension components that are not operating properly may cause a disturbance to the vehicle during application of the brake system.
5
Steering components that are not operating properly may cause a disturbance to the vehicle during application of the brake system.
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BRAKING ACTION UNEVEN - FRONT TO REAR
Test Description
The number below refer to the step number in the diagnostic table:
4
Suspension components that are not operating properly may cause a disturbance to the vehicle during application of the brake system.
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BRAKE PEDAL EXCESSIVE TRAVEL
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BRAKE PEDAL EXCESSIVE EFFORT
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BRAKES DRAG
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BRAKE SYSTEM SLOW RELEASE
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BRAKE FLUID LOSS
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DISC BRAKE SYSTEM DIAGNOSIS
Test Description
The numbers below refer to the step numbers in the diagnostic table:
9
Lubricant leaks from non-brake system components may come in contact with and contaminate brake system components.
10
Lubricant leaks from non-brake system components may come in contact with and contaminate brake system components.
12
Disc brake rotor shields/backing plates that come in contact with disc brake rotors may cause brake system noise.
15
Disc brake rotor thickness variation that exceeds the maximum acceptable level can cause brake pulsation.
19
Disc brake rotor thickness variation that exceeds the maximum acceptable level can cause brake pulsation.
22
Disc brake rotor assembled lateral runout (LRO) that exceeds the maximum acceptable level can lead to thickness variation.
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HYDRAULIC BRAKE SYSTEM DIAGNOSIS
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BRAKE ASSIST SYSTEM DIAGNOSIS
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READ NEXT:
Brake System Vehicle Road Test
Preliminary Inspections
1. Visually inspect easily accessible brake system components for obvious
damage and/or leaks which
may indicate that the vehicle should not be driven until further inspection
Hydraulic Brake Component Operation Visual Inspection
1.
WARNING: Refer to Brake Fluid Irritant Warning.
CAUTION: Refer to Brake Fluid Effects on Paint and Electrical Components
Caution.
With the tire and wheel assemblies removed and the brake rotors r
SEE MORE:
Maintenance Schedule
Owner Checks and Services
At Each Fuel Stop
Check the engine oil level.
Once a Month
Check the tire inflation
pressures.
Inspect the tires for wear.
Check the windshield washer
fluid level.
Engine Oil Change
When the CHANGE ENGINE OIL
SOON message displays, have the
engine oil and filter
Reclining Seatbacks
Warning:
Sitting in a reclined position when
the vehicle is in motion can be
dangerous. Even when buckled
up, the seat belts cannot do
their job.
The shoulder belt will not be
against your body. Instead, it will
be in front of you. In a crash, you
could go into it, receiving neck or
other injuries.
