17NA040 Service Bulletin/Repair Instructions

Bulletin No.:
Service Bulletin
Date:
17-NA-040

August, 2020
TECHNICAL

Subject:
Brake Squeal or Squeak Noise Intermittently on Initial Brake Applies
Brand:
Model:
Buick
Regal GS

ATS

XTS
Cadillac
CTS (VIN A)
Model Year:

to
2013
2019
2019
Engine:
Transmission:
—
All
All
—
All
All
—
All
All
from
to
2013

2014
ATS-V

CTS-V
VIN:
from
2016
CT6

Chevrolet
Corvette
2014
2020
SS
2014
2017
Involved Region or Country
North America, Japan, Europe, Russia, Middle East
Condition
Some customers may comment on a squeal or squeak noise from the front brakes. This

condition normally only occurs on initial brake applications after the vehicle has sat for an

extended time. The condition occurs typically under light braking, in speeds under 16 km/

h (10 mph). After 1-6 brake applies, or after braking at higher speeds, the noise no longer

occurs. This condition may occur more often in high humidity conditions.
Correction
Apply a coat of copper paste to completely cover the pad backing plate abutments on

each end.
Service Procedure

Important: The use of wheel cleaners or power

washers directly pointed at the brake caliper may wash

the copper paste off of the brake pads. It may be

necessary to apply the copper paste again if the

lubricant is washed away. The copper paste should be

applied whenever the brake pads are removed or

replaced.

Apply a coat of copper paste to completely cover the

pad backing plate abutments on each end. The paste

should not extend onto the friction material. Follow the

instructions listed below.
Copyright 2020 General Motors LLC. All Rights Reserved.
Page 2
August, 2020
Buick Regal
Bulletin No.: 17-NA-040
Note: Avoid a light apply of the paste as illustrated

above.

4. Re-install the front disc brake pads. Refer to Front

Disc Brake Pads Replacement in SI.

Cadillac Models and Chevrolet Models
3326987
Legend

(1)
Abutment Area

3326987
Legend

(1)
Abutment Area
4064756
Legend

(1)

(2)

(3)
Cleaned Abutment Area

Correct Amount of Copper Paste

Incorrect Amount of Copper Paste
1. Remove the front disc brake pads. Refer to Front

Disc Brake Pads Replacement in SI.

2. Using acrysol Kent Industries Part# P2005 or

equivalent, wipe clean both ends of the abutment

area on the front pads and calipers.

3. Apply approximately 0.10 g (0.0035 oz) of copper

paste to each end of the disc brake pad abutments

that contact the brake caliper bracket.
4064756
Legend

(1)

(2)

(3)
Cleaned Abutment Area

Correct Amount of Copper Paste

Incorrect Amount of Copper Paste
1. Remove the front disc brake pads. Refer to Front

Disc Brake Pads Replacement in SI.

2. Remove the rear disc brake pads. Refer to Rear

Disc Brake Pads Replacement in SI.
Bulletin No.: 17-NA-040
August, 2020
4337633
3. Using acrysol Kent Industries Part# P2005 or

equivalent, wipe clean both ends of the abutment

area on the front and rear pads and calipers.

4. Apply approximately 0.10 g (0.0035 oz) of copper

paste to each end of the disc brake pad abutments

that contact the brake caliper bracket.

Note: Ensure that the ends of the brake pads have

enough copper paste applied, if not, could result of the

noise condition returning.
Page 3
4364283
5. (Chevrolet SS Models Only) Apply a rectangular

shape of copper paste in the center of the spacer

before installing on the back of the pad.

Note: DO NOT replace brake pads for this condition.

6. Re-install the front disc brake pads. Refer to Front

Disc Brake Pads Replacement in SI.
4337814
4364263
Important: DO NOT remove the silencers (1) on

the pads.

Important: Always replace brake pads with Brembo

GM OEM pads (2). Aftermarket pads could result in the

braking performance changing in many ways.

7. Re-install the rear disc brake pads. Refer to Rear

Disc Brake Pads Replacement in SI.
Page 4
August, 2020
Bulletin No.: 17-NA-040
Parts Information

For Export Regions that may not be able to obtain the

part numbers below, please use an appropriate

equivalent.

Description
Lubricant
Part

Number

19303310

(In Canada,

use

19303311)
Qty
3
Warranty Information

For vehicles repaired under the Bumper-to-Bumper

coverage (Canada Base Warranty coverage), use the

following labor operation. Reference the Applicable

Warranties section of Investigate Vehicle History (IVH)

for coverage information.

Labor

Operation
Description
Labor Time
2480038*
Cleaning and Reapplying

Lubricant to Front Disc

Brake Pads
0.6 hr
Add
Cleaning and Reapplying

Lubricant to Rear Disc

Brake Pads
0.4 hr
*This is a unique Labor Operation for bulletin use only.
Version
5
Modified
March 6, 2017 – Added the Cadillac CT6 model.

March 17, 2017 – Removed an Important statement from Service Procedure.

November 30, 2018 – Added the 2018 and 2019 Model Years.

August 11, 2020 – Added the 2020 Corvette Model, updated the Involved Region or

Country section, added an Export region statement to the Parts Information and relocated

the Parts Information and Warranty Information sections.
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

Bestseller No. 1

THINKCAR Bidirectional Scan Tool, THINKSCAN 689BT All System Automotive Diagnostic Tool, Bi Directional OBD2 Scanner with ECU Coding, 34 Services, FCA Autoauth, CANFD and DoIP, Wireless Update

[Notice] When you receive a used device, it may be a customer return resold by Amazon without inspection. You can exchange it for a new one through Amazon. As this situation is unavoidable, we sincerely apologize. For any issues, contacting us via Amazon's "Messages" is the best way, and we’ll provide a solution within 24 hours. THINKSCAN 689BT Can Be Used Immediately After It is Turned On, Without Complicated Registration Process, Which is More Convenient & Quick.
[Good News] THINKSCAN 689BT is the most competitive automotive scan tool to date, offering wireless updates with no subscription fees(valued 500Buc.ks) . With all the features of THINKTOOL PD8,PRO, built on Android 10 platform with 4-core CPU, 4GB RAM and 64GB ROM, serving up to 5X faster than older MAX/MINI/PLUS vehicle scanners, no more slow and delayed feedbacks, it's time to update your garage tool.
[Big Money Saver] Premium THINKSCAN 689BT Wireless Diagnostic Scanner, save up to 400USD per year, includes all useful features: Full bi-directional controls, ECU coding, 34+ services, OEM all system diagnostics, Worldwide vehicles coverage, CAN FD & DoIP, FCA AutoAuth（The 689BT only provides a login and purchase portal, and users are required to register for an FCA account and pay a membership fee in order to perform the relevant automotive diagnostics)
[3000+ Active Tests]Active testing is one of the most useful features in automotive maintenance and greatly improves mechanic efficiency. THINKCAR 689BT bidirectional scanner can send action commends to vehicle sub-systems or components for active test without using vehicle controls. It can perform various tests such as: EVAP Test, Fuel Trim Reset, Injector Buzz Test, Window/ Mirror/ Door Lock Test, Pump and Value Tests, etc. Get functions from "Diagnose>Car Model>System>Active Test".
[Hot Advanced Features] 689BT bidirectional tool newly adds ECU Coding, Power Balance, Flash Hidden Functions, Reset Adaptive Data, Match Replaced Components, Customize OE-Settings. Such as: 1. changing the color of interior lights 2. switching on/off the auto hold, 3. customizing dash kits 4. activating the auto side mirror folding function 5. disables auto start-stop. Note: Coding functions vary by model&year.

SaleBestseller No. 2

THINKCAR THINKSCAN 689 OBD2 Scanner, Bidirectional Scan Tool with Lifetime Free Update, 34+ Reset, 3000+ Active Test, ECU Coding, PMI, Wired All System Diagnostic Scanner for Cars, CANFD/DOIP, FCA SGW

【Warm Tips】Wired THINKSCAN 689 is connected through a detachable OBDII cable, and we also have added OBD2 Extension Cable (about 60 cm/2 feet) as g ift, enabling customers handling vehicle repairs with ease. Just click "Bundles Item" above to get it.
【Professional Car Diagnostic Tool】Tired of renew fees? Thinkscan 689 scanner provides dealer-level advanced functions for lifetime f.r.e.e update for auto mechanics and repair shops. 34+ Services, 3000+ Active Test, ECU Coding, 140+ Brands Coverage, FCA AutoAuth, CANFD&DOIP Protocol, Component Matching, Power Balance, V.A.G Guided, Compatible with Google Chrome integration, etc. With strong hardware backing, 64G Memory, Android 10, 4-core processors, and 4150mAh battery. Thinkscan 689 brings you the best as your daily business helper and never lets you drop the ball!
【Over 34 Reset Service, Adaptation + Relearn + Calibration + Initialization + Matching】Made for workshops, Thinkscan 689 scanner provides 34+ services for worldwide vehicles: such as Gear/SAS/EPB/TPMS/D.P.F/I.M.M.O/BMS/ETS/Oil/Brake/AFS/GEARBOX/SUNROOF/SUS Reset, ABS Bleed, Injector coding, etc. Warm tips: Compatibility may vary on vehicles' model and year, please contact seller before purchase to make sure it works well on your cars.
【Real Active Test】Thinkscan 689 scan tool features over 3000+ full bi-directional control ability, to send commands to vehicle’s systems/components, to verify system input/output without using the vehicle's controls, e.g. turn on the radiator fan, modulate the throttle, open/close windows, operate mirrors, Injector Buz Test, turn on interior&exterior lights, sound horn, test door lock actuators, turn on/off front/rear side ACM Solenoid, Vehicle level position calibration, Wheel Speed Sensor Supply.
【Comprehensive Solutions with Advanced Features】Take your vehicle customization to the next level with the Thinkscan 689's advanced ECU coding capabilities. This scan tool provides power balance, PMI, unlock more new features and enhance performance by activating dormant functions, customizing OE settings, matching replaced components, and reprogramming adaptive data to elevate your driving experience. Note: Compatibility varies by car models, please check before order.

SaleBestseller No. 3

THINKCAR THINKSCAN 662 OBD2 Scanner,Car Diagnostic Tool with Bidirectional Active Test,Car Scanner Engine ABS SRS Transmission,Scanner for Car with 12 Reset,CAN FD & FCA SGW,Lifetime Free Update

【Powerful Bidirectional Control -- Active Test】Good News! The THINKSCAN 662 obd2 scanner has bidirectional control function,which is the most popular feature among mechanics.This function is mainly used to test whether the executing components in the electronic control system can work normally,By requesting information from the vehicle's ECU or sending commands to the ECU module to execute commands and identify maintenance status,quickly locate the cause of the fault.Such as ABS,Fuel Injectors,Adjusting Throttle,Coolant Fans,Radiator Fans,Coolant Pumps,EV.AP Test, Fuel Trim Reset,Injector Buzz Test,Pump/ Value Test,etc. Effectively shorten diagnosis time and reduce diagnosis costs.
【Unlock Pro-Level Diagnostics With Half Costs】 THINKSCAN 662 obd2 scanner diagnostic tool Delivers Premium Scanning Power for Half the Price! The OBD2 scanner can handle common issues with ECM,TCM,ABS,SRS. It can easily read and clear fault codes, analyze data streams, and ensure quick identification of problems. THINKSCAN 662 bidirectional scan tool has 12 practical reset functions, including Airbag Reset,ABS Bleeding,BMS,Brake Reset, D.P.F,Throttle Adaptation,Injector Coding,OIL Reset,steering angle Reset,Gearbox,TPMS,and more. The car scanner diagnostic tool very suitable for DIY enthusiasts, car repair technicians, and small and medium-sized repair shops.
【Multi Functional Intelligent Car Scanner Diagnostic Tool】 Automatic VIN + Real-time Data + DTC Lookup + Historical Diagnostic Records: This OBD2 scanner features auto serch technology, allowing for car recognition without the need for manual input. The real-time data of the car ECU is read and displayed in the form of text or a 4-in-1 merged waveform chart. You can save, share, print or send the entire inspection report via email for analysis. Historical diagnostic reports help you quickly identify vehicle issues and understand the condition of the vehicle. The built-in 'feedback' module provides customized repair Operation recommendations from our certified professionals.
【Upgraded Hardware + Ergonomically Engineered】 THINKSCAN 662 OBD2 scanner has a friendly combination of touch screen and physical buttons with an ergonomic appearance for comfortable use.Experience 2x faster scans and 50% longer lifespan vs standard models.This scanner para autos boast a 4-core 1.8GHz CPU,6.2-inch HD touch screen,2GB RAM + 32GB ROM storage capacity,a long-lasting 4150mAh battery,Android 8 ensures lightning-fast bootup and processing.The scanner is robust with rubberized protection that you can store and use in the trunk or garage.Whether you are engaged in Home car maintenance or road rescue car repair,this car scanner can help you perfectly solve car problems.
【Effortless Setup & Scanning - Intuitive for All Skill Levels】No More Complicated Scanners! The User Interface is as User-Friendly as THINKCAR 689BT! Truly Plug-and-Play,The downward sliding setup shortcut portal and drawer function shortcut portal make you use this scan tool as easy as using your own cell phone.The car scanner supports setup screenshot,screen recording,volume adjustment,this scan tool includes product e-manuals,instructional videos,and fault code libraries,users can check the usage guide,perfect for DIY car owners,Maintenance technician.If your father,husband,brother,boyfriend enjoys car repairs,THINKSCAN 662 is a great gift choice, and it has amazing family value.

This product presentation was made with AAWP plugin.

Last update on 2026-05-13 / Affiliate links / Images from Amazon Product Advertising API

Buffer Email Facebook Flipboard Hacker News LinkedIn Messenger Mix Pinterest Print Reddit SMS Telegram Tumblr X VK WhatsApp Line Xing Threads Bluesky Copy Mastodon Nextdoor