Kenworth Truck Company
Customer Service Department
PO Box 1000
Kirkland, Washington 98083-1000
(425) 828-5888

Date TBD
[First VIN]
Customer Name
Address
City, State Zip
Subject: TIB 34-071 T680, T880, W990 Brake Lights activate when the Engine Brake is Applied on trucks
ordered with this feature disabled
Dear Kenworth Customer,
Your vehicle (listed within this letter) was ordered with the feature for the Brake Lights to be Disabled when the
Engine Brake is Applied but was built with this feature enabled. Therefore, your vehicle is eligible for a campaign
to install a software update to disable the brake lights when the engine brake is applied.
Please contact a Kenworth dealership to schedule an appointment for this work. If you have already had this
work performed, please disregard this letter. You can find your nearest Kenworth dealer at Dealer Locator on the
website www.Kenworth.com.
When contacting your selected Kenworth dealer, refer to campaign TIB 34-071 and the VIN listed on this letter.
The work will take approximately 1.0 hour, depending on vehicle configuration and dealer scheduling. There
will be no charge to you if completed within Standard Warranty (includes Extended Warranty) or for upgrades
completed by 04/01/2020, whichever is greater. We apologize for this inconvenience but ask for your cooperation
to ensure your continued satisfaction with Kenworth products.
If you require further information about this campaign, reimbursement of a pre-notification remedy associated
with this recall, or experience any difficulty in making arrangements for this repair, please contact Kenworth
Customer Service, provide your name, your dealer’s city and state, your phone number, your email address
(optional), the last 8 digits of your VIN, the bulletin number, and your question, using one of the following:
Email: Kenworth.Campaigns@paccar.com with the bulletin number in the subject line
or
Mail: Kenworth Truck Company, P.O. Box 1000, Kirkland, WA 98083-1000, Attn: Customer Service
Department
or
Phone: 425-828-5888
If you no longer own this vehicle, we would appreciate your advising us of the new owner if you know their name.
Thank you,

Shondip Chakravarty
Director of Customer Service
Kenworth Truck Company

VIN:

[VIN List]

TIB 34-071 - Brake lights activate when the engine brake is applied on trucks ordered wit... Page 1 of 3

Technical Information Bulletin
34-071

Section
Wiring and Lighting - 34

Subject
Brake lights activate when the engine brake is applied on trucks ordered with this feature disabled.

Release Date
3/8/2019

Condition
Chassis were ordered with the feature for the Brake Lights to be Disabled when the Engine Brake is Applied but were built with this
feature enabled.

Chassis Affected
85 chassis (54 U.S. and 31 Canada), T680, T880, W990 MY2019 vehicles built from 04/04/2018 through 10/26/2018 ordered with the
feature for the Brake Lights to be Disabled when the Engine Brake is Applied but were built with this feature enabled. See the attached
chassis list for specific chassis.

Action
CAMPAIGN
Service all chassis affected that enter your dealership, even if the customer has no issue with the chassis.
1.
2.
3.

Review the attached chassis list for your dealer code and schedule your customer(s) for service if their chassis is on the list.
If you are not using Service Management to start repair orders, review DWWC or SIR for "Complete" next to the "34071"
campaign code prior to performing this repair.
Follow the procedures below to update the parameters with DAVIE4.

This campaign can be performed at any time convenient for the customer (for example: during the next scheduled maintenance

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TIB 34-071 - Brake lights activate when the engine brake is applied on trucks ordered wit... Page 2 of 3

interval).

Warranty
Through Standard Warranty (includes Extended Warranty) or for repairs completed by 04/01/2020, whichever is greater, Kenworth will
pay for labor to update the software to disable the brake lights when the engine brake is activated:
0.4 hours labor to update the software. Use Quick Claim Code 34-071.
File an additional claim for extraordinary circumstances, referencing 34071 in the CCC. A quick claim for standard labor must
be filed first.
Take-Off Parts Disposition: N/A
CLAIM CODING
Failure Location:

034-002-999

Work Accomplished:

58

Failure Type:

700

Responsibility Code:

01

SRT Code:

045-986
Claim Type:
DAVIE 4Download new
software to PCI.
(Includes
programming both
the PCI and ACM.
Includes clearing
erroneous fault
codes from
programming.
Includes hooking
up and charging
batteries).
0.4 hrs.

C

Procedure
See the attached procedure.

Attachments
Update Procedure
Dealer\Chassis List
Customer Letter

Authored by: OF

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through this system are confidential and proprietary and the property of PACCAR Inc and its suppliers, and must be kept strictly
confidential pursuant to the contract licensing such access. Disclosure, publication, release or distribution of any material found on
PACCAR systems to any person other than employees with a need to know such information is strictly prohibited. All activity on this
system is monitored. If PACCAR suspects or discovers any unauthorized activity, access may be immediately terminated without

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TIB 34-071 - Brake lights activate when the engine brake is applied on trucks ordered wit... Page 3 of 3

prior notification. Violators may be subject to legal action.

© Copyright 2019 PACCAR Inc. All rights reserved. We welcome your feedback on this page. For technical questions or concerns
about this page, please contact the DealerNet Webmaster.

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Date TBD

Subject:

FRN 34-071: Brake Lights Activate When Engine Brake is Applied
EXPIRATION DATE: February 01, 2020
The VINs are listed on the back or bottom of this page

Customer Name
Address
City, State Zip

Dear Peterbilt Customer,
This letter is sent to notify you that Peterbilt has released a software update to correct a
parameter issue that was discovered in some Model 579 vehicles. In the affected vehicles, the
application of the engine brake will cause the brake lights to illuminate. Peterbilt has determined
that you own one or more of the affected vehicles.
The problem is…

Brake lights activate when the engine brake is applied

Correction…

Update the software to disable the brake lights when engine brake is
applied

What you must do …

Contact your dealer immediately to schedule an appointment

Please contact a Peterbilt dealership to schedule an appointment for this work. If this work has already been
performed, please disregard this letter. You can find your nearest Peterbilt dealer at Dealer Locator on the
website www.Peterbilt.com. The work will take approximately 1.0 hours of labor depending on vehicle
configuration and dealer scheduling. There will be no charge to you if completed prior to 04/01/2020.
We apologize for any inconvenience this may cause and thank you for your participation in helping Peterbilt
provide the highest levels of customer satisfaction and service expertise.
We value your business and appreciate your ongoing loyalty to Peterbilt and its dealer network. Industry-leading
quality, performance and reliability are hallmarks of Peterbilt products, and we thank you for making Peterbilt your
truck of choice.
Thank you,

Doug Gunter
Director of Customer Service
Peterbilt Motors Company

34-071 Engine Brake-Brake Light Parameter Reset

Page 1 of 2

Repair Notice
34-071

Section
34 - Wiring and Lighting

Description
Certain trucks were ordered with the feature for the brake lights to be disabled when the engine brake is applied but were
built with this feature enabled.

Release Date
3/8/2019

Introduction
Certain Model 579 vehicles are equipped with an engine brake that may be programmed to enable the brake lights when
the engine brake is applied. These vehicles were ordered with the brakes lights to be disabled when the engine brake is
applied and are eligible for a software update to disable this feature.

Resolution
CAMPAIGN
Service all chassis affected that enter your dealership, even if the customer has no issue with the chassis.
1.
2.
3.

Review the attached chassis list for your dealer code and schedule your customer(s) for service if their chassis is
on the list.
If you are not using SmartLINQ Service Management to start repair orders, review the DWWC or SIR for
“Complete” next to the “34071” campaign code prior to performing this repair.
Follow the procedures below to update the parameters with DAVIE4.

Warranty
For repairs completed prior to 4/1/2020, regardless of factory or extended warranty coverage, Peterbilt will pay the dealer
to correct the programming for the tail lights preventing illumination during engine brake applications.
0.40 hours labor to update the software. Use Quick Claim Code 34071.
File an additional claim for extraordinary circumstances, referencing 34071 in the CCC. A quick claim for standard
labor must be filed first.

https://eportal.paccar.com/dealer/uspb/en/service/vehiclebulletins/vehiclefieldrepair/Pages/3... 4/3/2019

34-071 Engine Brake-Brake Light Parameter Reset

For Field...

Enter...

Failure Location

034-002-999

Failure Type

700

Claim Type

C

Responsibility

09

SRT 045-986

Page 2 of 2

0.40 hours labor to update software

Procedure
Procedure

Attachments
Chassis List
Customer Letter

Authored by: PR

Access to PACCAR’s Enterprise Portal is provided as a benefit of doing business with PACCAR. All applications and
content accessed through this system are confidential and proprietary and the property of PACCAR Inc and its suppliers,
and must be kept strictly confidential pursuant to the contract licensing such access. Disclosure, publication, release or
distribution of any material found on PACCAR systems to any person other than employees with a need to know such
information is strictly prohibited. All activity on this system is monitored. If PACCAR suspects or discovers any
unauthorized activity, access may be immediately terminated without prior notification. Violators may be subject to legal
action.
© Copyright 2019 PACCAR Inc. All rights reserved. We welcome your feedback on this page. For technical questions or
concerns about this page, please contact the DealerNet Webmaster.

https://eportal.paccar.com/dealer/uspb/en/service/vehiclebulletins/vehiclefieldrepair/Pages/3... 4/3/2019