20NA027

Bulletin No.:
Service Bulletin
Date:
20-NA-027
February, 2020
TECHNICAL
Subject:
Malfunction Indicator Lamp (MIL) Illuminated - DTC P2635 Set
This bulletin replaces PIT5727. Please discard PIT5727.
Brand:
Model:
Chevrolet
Equinox
Holden
Equinox
GMC
Terrain
Model Year:
VIN:
from
to
2020
2020
from
Engine:
Transmission:
to
LTG
Involved Region or Country
North America, Middle East, Israel, Australia/New Zealand
Additional Options (RPOs)
Equipped with CHASSIS DRIVE LINE-FRONT WHEEL DRIVE (FWD)
Condition
Some customers may comment that the MIL is illuminated.
Some technicians may find DTC P2635 (Fuel Pump Flow Performance) stored in the Fuel
Pump Driver Control Module.
Cause
This condition may be caused by the ECM detecting higher than expected fuel tank pump
pressure.
Correction
Check fuel tank pump pressure at idle:
• If the pressure is higher than 58 psi (400 KPA), reprogram the ECM with the latest
calibration.
• If the fuel pressure at idle is below 58 psi (400 KPA), refer to SI for further diagnostics.
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.
Important: 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 2020 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.
Page 2
February, 2020
Bulletin No.: 20-NA-027
5431207
Important: 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.: 20-NA-027
February, 2020
Page 3
5431209
Important: To avoid warranty transaction rejections,
you MUST record the warranty claim code provided on
the SPS Warranty Claim Code (WCC) screen on the
job card. Refer to callout 1 above for the location of the
WCC on the SPS screen
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 Emission coverage,
use the following labor operation. Reference the
Applicable Warranties section of Investigate Vehicle
History (IVH) for coverage information.
Labor
Operation
2886668*
Description
Labor Time
Check Fuel Tank Pump
Pressure and Engine
Control Module
Reprogramming with SPS
0.4 hr
*This is a unique Labor Operation for Bulletin use only.
Important: **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.
Page 4
February, 2020
Bulletin No.: 20-NA-027
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
1
Modified
Released February 14, 2020
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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