Brakes - Warranty Service and Procedures: Overview
Bulletin No.: 05-05-22-002BDate: November 30, 2006
WARRANTY ADMINISTRATION
Subject:
Brake Warranty Service and Procedures - LRO, Lateral Runout, Rotor, Corrosion, Pulsation, Pads, Wear, Noise, Refinish, Clean-up, Squeak, Grind, Groan
Models:
1999-2007 Saturn Vehicles (U.S. Only)
Supercede:
This bulletin is being revised to update the warranty information. Please discard Corporate Bulletin Number 05-05-22-002A (Section 05 - Brakes).
Saturn retailers in Canada should refer to Corporate Bulletin Number 00-05-22-002*.
For all warranty brake service, the procedures in this bulletin must be followed.
PLEASE FAMILIARIZE YOURSELF WITH THESE UPDATES BEFORE PERFORMING YOUR NEXT GM BRAKE SERVICE.
For your convenience, this bulletin updates and centralizes all GM's Standard Brake Service Procedures and Policy Guidelines for brake rotor and brake pad service and wear. For additional information, the Service Technical College lists a complete index of available Brake courses. This information can be accessed at www.gmtraining.com>resources>training materials>brake LRO courseware index.
There are five (5) key steps that must be performed to complete a successful brake service:
Measure and Document Rotor Thickness* - determine rotor refinish/replace
Clean Mating Surfaces - hub, rotor and wheel
Proper Rotor Refinish and Documentation
Measure, Document and Correct Lateral Run Out (LRO)** - Maximum 0.050 mm (0.002 in)
Reassemble with Proper Torque - wheel lug nuts
* The bulletin refers to Minimum Thickness specification as the minimum allowable thickness after refinish. Always refer to SI to verify the spec stamped on the rotor is the minimum thickness spec after refinish and not the discard spec.
**The bulletin will refer to LRO maximum specification as 0.050 mm (0.002 in). However, some trucks may slightly differ. Refer to SI to verify specifications.
Bulletin Format
Reference:
***CUSTOMER SERVICE ORDER/WARRANTY CLAIM REQUIRED DOCUMENTATION
When using any one of the brake labor operations listed in this bulletin, the following three rotor measurements (1. Original Rotor Thickness, 2. Refinished Rotor Thickness and 3. Lateral Run Out) are required and MUST be written/documented on the customer service order, or for your convenience, complete the form (GM Brake Service customer service order Documentation for Required Measurements) shown and attach it to the customer service order. If the Warranty Parts Center generates a request, this Documentation/Form must be attached to the customer service order that is sent back.
Documentation of brake lathe maintenance and calibration as recommended by the lathe manufacturer must be available for review upon request.
Customer Service Order Documentation - Rotor Original And Refinished Thickness - REQUIRED
When resurfacing a brake rotor or drum, the ORIGINAL thickness (measured thickness before refinish) and REFINISHED thickness (measured thickness after refinish) MUST be written/documented on the customer service order hard copy for each rotor serviced. If a rotor replacement is necessary, only the Original thickness measurement needs to be recorded.
Customer Service Order Documentation - Lateral Run Out (LRO) and Correctional Plate Part Number- REQUIRED
When using any one of the brake labor operations listed in this bulletin, the rotor assembly MUST be measured for Lateral Run Out (LRO) (follow brake procedure steps 9-11). If the LRO measurement is greater than 0.050 mm (0.002 in), correct it by using the proper Brake Align� Correctional Plate (DO NOT refinish new rotors or newly refinished rotors to correct LRO). This LRO measurement, and the Correctional Plate part number used to correct the LRO, MUST be written/documented on the customer service order hard copy. If no correction is necessary, only the LRO measurement for each rotor serviced needs to be recorded.
Correction plates can only be used on Hubless rotor design. A correction plate part number can not be used with Hubbed, Trapped or Captured type designed rotors.
Warranty System Documentation - Lateral Run Out (LRO) - REQUIRED
When using any one of the brake labor operations listed in this bulletin, the Lateral Run Out (LRO) measurement (as measured in the "customer service order Documentation - Lateral Run Out" section above) MUST be documented in the technician comments section of the warranty claim.
Customer Service Order Documentation - Explanation of Part Replacement - REQUIRED
If replacement of a brake component is necessary, proper documentation on the customer service order is required. See the following examples:
Brake rotor replacement - Customer comment was brake pulsation. Rotor was refinished on a prior brake service. After rotor measurement, it was determined that refinishing the rotor again would take it under the Minimum Thickness specification.
Brake pad replacement - Customer comment was brake squeak noise. On inspection, found pads contaminated by fluid leak at caliper.
TOOL INFORMATION
CORRECTION PLATE PART INFORMATION
WARRANTY INFORMATION
WORKSHEET - BRAKE LATHE CALIBRATION
Disclaimer