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Home >> Chevrolet >> 2021 >> Trailblazer RS, FWD >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Hydraulic Brakes >> Diagnostic Information and Procedures >> Brake Pedal Excessive Effort

Brake Pedal Excessive Effort

Step Action Yes No
DEFINITION: Brake pedal requires an increased amount of input from the driver to obtain good braking action and/or stopping distance is increased.
1 Were you sent here from the Hydraulic Brake Symptom table? Go to Step 2  Go to Diagnostic Starting Point - Vehicle
2
  1. Inspect the brake assist system for the following conditions:
    • Lack of lubrication, binding or excessively worn pushrod or pedal pivots or pivot bushings
    • Bent or damaged pedal pushrod, pedal, or pedal bracket
  2. Adjust, repair or replace components as necessary. Hydraulic Brake System Diagnosis 
Did you find and correct a condition?
Go to Step 5  Go to Step 3 
3
  1. Inspect the hydraulic brake system for the following conditions:
    • Binding caliper pistons
    • Internally damaged flexible brake hoses; hindering fluid flow
    • External brake fluid leaks
    • Kinked or damaged flexible brake hoses and/or pipes
    • Internal brake fluid leaks; improperly operating master cylinder
    • Poor brake fluid quality; low boiling point
  2. Adjust, repair or replace components as necessary. Hydraulic Brake System Diagnosis 
Did you find and correct a condition?
Go to Step 5  Go to Step 4 
4
  1. Inspect the disc brake system for the following conditions:
    • Excessively worn linings
    • Glazed linings
    • Cracked, distorted or damaged linings
    • Contaminated linings
    • Binding, damaged or excessively worn caliper hardware and/or lining hardware
    • Lack of lubrication or excessive corrosion on metal to metal contact surfaces
    • Excessively worn or corroded rotor friction surfaces
    • Glazed rotor friction surfaces
    • Hard spots, heat checks, blueing discoloration of rotor friction surfaces
  2. Adjust, repair or replace components as necessary. Disc Brake System Diagnosis 
Did you find and correct a condition?
Go to Step 5  Go to Diagnostic Starting Point - Vehicle
5
  1. Install or connect components that were removed or disconnected during diagnosis.
  2. Road test the vehicle in order to confirm proper operation. Brake System Vehicle Road Test 
Is the condition still present?
Go to Step 2  System OK