NHTSA ID Number: 10180306
Manufacturer Communication Number: 20NA020
TSB/Document Date: 2020-09-28
Summary
This technical bulleti provides a procedure to replace the front and rear brake pads if the brakes are squealing.
Bulletin No.:
Service Bulletin
Date:
20-NA-020
August, 2020
TECHNICAL
Subject:
Brake Squealing Noise
Brand:
Model:
Silverado 2500HD/
3500HD
Sierra 2500HD/
3500HD
Model Year:
Date Breakpoint:
from
to
from
to
2020
2020
SOP
September
01, 2019
Engine:
-
-
Involved Region or Country
United States, Canada, Mexico, Middle East, Israel
Condition
Some customers may comment that the brakes are squealing.
Cause
This condition may be caused by a low scorch friction material was used on the original
brake pads.
Replace the front and rear brake pads.
Correction
5638981
Note: Each brake pad is labeled with an Inner or Outer to indicate where to be installed.
New pads have a "high scorch" friction material. Current parts in inventory are the new
design.
If the pads have already been replaced and the noise persists, check the orientation of
the pads. There is an inboard and outboard designation on the pads. If they are in the
wrong location, a brake noise can result.
Copyright 2020 General Motors
LLC. All Rights Reserved.
Page 2
August, 2020
Bulletin No.: 20-NA-020
Service Procedure
5638987
Important: Only the left side of the truck has the wear
sensors (1) and is mounted on the inner pad.
Refer to Front and Rear Disc Brake Pads Replacement
in SI.
Parts Information
Causal
Part
Description
PAD KIT, FRT
DISC BRK
X
PAD KIT, RR
DISC BRK
Part
Number
Qty
1
Refer
To EPC
1
Warranty Information
Repairs made for the specific concern within this bulletin may be covered under the New Vehicle Limited Warranty
Bumper-to-Bumper terms (Canada Base Warranty). Refer to the vehicle’s Limited Warranty and Owner Assistance
Information booklet for coverage details.
Labor Operation
Description
Labor Time
2420150
Front Disc Brake Pads Replacement
2420170
Rear Disc Brake Pads Replacement
Use the Published Labor
Operations Time
Version
4
Modified
Released January 28, 2020
Revised May 20, 2020 - Removed bulletin only labor op and added LTG labor op.
Revised July 09, 2020 – Updated Involved Regions, Correction Section, and added
Warranty Statement to Warranty Information Section
Revised August 06, 2020 – Add Brake pad graphic and note to Correction section and
brake pad sensor and Important statement to Service procedure section.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these
technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper
service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a
job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your
vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the
information.
WE SUPPORT VOLUNTARY
TECHNICIAN
CERTIFICATION
- Mixes well with conventional fluids
- Low-moisture formula provides excellent vapor lock...
- Ideal for hydraulic and disc brakes
- Provides an extra margin of safety in extreme braking...
- Mix of polyglycol ethers ensures hot brake-system operation...
- Excellent for ABS, disc and drum brake systems
- Delivers braking power when needed by avoiding a spongy...
- Both wet and dry boiling points exceed the minimum...
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TSB/Document ID: 20NA020
Replacement Service Bulletin Number:
MFR Communication Date: 2020-08-06
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: SERVICE BRAKES, HYDRAULIC
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
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