Bulletin No.:

Service Bulletin

Date:

18-NA-300
November, 2019

TECHNICAL
Subject:

Malfunction Indicator Lamp (MIL) Illuminated - DTC P050F Set
This Bulletin replaces PIT5607A. Please discard PIT5607A.

Brand:

Model:

Buick

Envision

Chevrolet

Equinox

GMC

Terrain

Model Year:
from

VIN:
to

from

to

Engine:

Transmission:

2.0L (LTG),
2.5L (LCV)
2018

2019

1.5L (LYX),
2.0L (LTG)

Involved Region or Country

North America, Middle East, Israel, Palestine, Argentina, Brazil, Bolivia, Chile, Columbia,
Ecuador, Paraguay, Peru, Uruguay, South Korea, China, Thailand, Australia, New
Zealand, Egypt and Africa.

Condition

Some customers may comment that the MIL is illuminated.
Some technicians may find DTC P050F (Brake Booster Weak Vacuum) set in the Engine
Control Module (ECM).

Cause

This condition may be caused by a software anomaly.

Correction

Test the brake vacuum system to verify no leaks present and verify brake operation
performance. If leak identified follow SI diagnostics. If no leak identified, reprogram ECM
with latest calibration.

•

Service Procedure
Caution: Before downloading the update files, be sure
the computer is connected to the internet through a
network cable (hardwired). DO NOT DOWNLOAD or
install the files wirelessly. If there is an interruption
during programming, programming failure or control
module damage may occur.
Carefully read and follow the instructions below.
• Ensure the programming tool is equipped with the
latest software and is securely connected to the
data link connector. If there is an interruption
during programming, programming failure or
control module damage may occur.

Copyright 2019 General Motors LLC. All Rights Reserved.

•

•

Stable battery voltage is critical during
programming. Any fluctuation, spiking, over
voltage or loss of voltage will interrupt
programming. Install a GM Authorized
Programming Support Tool to maintain system
voltage. Refer to www.gmdesolutions.com for
further information. If not available, connect a fully
charged 12 V jumper or booster pack
disconnected from the AC voltage supply. DO
NOT connect a battery charger.
Turn OFF or disable systems that may put a load
on the vehicles battery such as; interior lights,
exterior lights (including daytime running lights),
HVAC, radio, etc.
Clear DTCs after programming is complete.
Clearing powertrain DTCs will set the Inspection/
Maintenance (I/M) system status indicators to NO

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November, 2019

Bulletin No.: 18-NA-300

5431207

Note: If the Same Calibration/Software Warning is
noted on the SPS screen, select OK and follow screen
instructions. After a successful programming event, the
WCC is located in the Service Programming System
dialogue box of the SPS Summary screen. No further
action is required. Refer to the Warranty section of the
bulletin.

1. Reprogram the Engine Control Module. Refer to
K20 Engine Control Module: Programming and
Setup in SI. Modify as required (e.g., select x
module from the controller screen. Then provide
step-by-step instructions or refer to SI procedure.

Bulletin No.: 18-NA-300

November, 2019

Page 3

5431209

2. Record SPS Warranty Claim Code on job card for
warranty transaction submission.

Parts Information
No parts are required for this repair.

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

4086488*

Engine Control Module Reprogramming with SPS

0.5 hr

*This is a unique Labor Operation for Bulletin use only.
To avoid warranty transaction rejections, carefully read and follow the instructions below:
• The SPS Warranty Claim Code must be accurately entered in the “SPS Warranty Claim Code” field of the transaction.
• When more than one Warranty Claim Code is generated for a programming event, it is required to document all Warranty
Claim Codes in the “Correction” field on the job card. Dealers must also enter one of the codes in the “SPS Warranty Claim
Code” field of the transaction, otherwise the transaction will reject. It is best practice to enter the FINAL code provided
by SPS.

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November, 2019

Bulletin No.: 18-NA-300

Warranty Claim Code Information Retrieval
If the SPS Warranty Claim Code was not recorded on
the Job Card, the code can be retrieved in the SPS
system as follows:
1. Open TIS on the computer used to program the
vehicle.
2. Select and start SPS.
3. Select Settings.
4. Select the Warranty Claim Code tab.
The VIN, Warranty Claim Code and Date/Time will be
listed on a roster of recent programming events. If the
code is retrievable, dealers should resubmit the
transaction making sure to include the code in the SPS
Warranty Claim Code field.

Version

4

Modified

Released October 08, 2018
Revised December 11, 2018 - Revised Labor Operation time.
Revised February 07, 2019 - Add Engine RPO’s.
Revised November 06, 2019 - Add Buick Envision, updated Service Procedure 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.

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