20NA197

Bulletin No.:
Service Bulletin
Date:
20-NA-197
September, 2020
TECHNICAL
Subject:
Brand:
Chevrolet
GMC
Malfunction Indicator Lamp (MIL) Illuminated - DTC P0087, P0089, P0191, P026C,
P026D, P1089, P163A, P163B, P2293, P228A, P228B, P228C, and/or P228D
Model:
Model Year:
from
to
Silverado
2017
2018
Silverado 2500HD/
3500HD
2019
2020
Silverado 4500HD,
5500HD and 6500HD
2019
2020
Sierra
2017
2018
Sierra 2500HD/
3500HD
2019
2020
VIN:
from
to
Engine:
Transmission:
L5P
L5D
L5P
Involved Region or Country
North America, Middle East, Israel, Palestine
Condition
Some customers may comment that the MIL is illuminated.
Some technicians may find one or more of the following DTCs set in the Engine Control
Module (ECM):
• P0087: Fuel Rail Low Pressure
• P0089: Fuel Pressure Regulator 1 Performance
• P0191: Fuel Rail Pressure Sensor 1 Performance
• P026C: Injection Quantity Too Low
• P026D: Injection Quantity Too High
• P1089: Fuel Rail Pressure Performance During Deceleration Fuel Cut-Off
• P163A: Control Module Fuel Pressure Regulator 1 Control System Circuitry
Performance
• P163B: Control Module Fuel Pressure Regulator 2 Control System Circuitry
Performance
• P2293: Fuel Pressure Regulator 2 Performance
• P228A: Fuel Pressure Regulator 1 Control - Forced Engine Shutdown
• P228B: Fuel Pressure Regulator 2 Control - Forced Engine Shutdown
• P228C: Fuel Pressure Regulator 1 Control Performance - Low Pressure
• P228D: Fuel Pressure Regulator 1 Control Performance - High Pressure
Cause
This condition may be caused by corrosion or damaged at the fuel pressure sensor
electrical connector.
Copyright 2020 General Motors LLC. All Rights Reserved.
Page 2
September, 2020
Bulletin No.: 20-NA-197
5652222
Inspect the fuel pressure sensor electrical connector for corrosion or damage.
⇒ It may be necessary to use the terminal test kit with dielectric grease on it
and apply/drag each terminal a few times.
Correction
5652223
• If you see a suspect terminal, it may be necessary to removal said terminal and
inspect for corrosion, damage and/or signs of the dielectric grease starting to turn
black.
• If any of the conditions have been found, replace the electrical connector.
Service Procedure
Refer to Connector Repairs in SI.
Bulletin No.: 20-NA-197
September, 2020
Page 3
Parts Information
Causal
Part
Description
Part
Number
Qty
N/A
CONNECTOR,
WRG HARN
19367009
1
N/A
ACDelco
Dielectric
Lubricant*
12377900
(U.S.)
10953529
(Canada)
1
*There is enough material to do additional vehicles. Store
the remaining material for future use.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation
Description
Labor Time
5430860
Connector Kit Replacement
Use the Published Labor
Operations Time
Version
1
Modified
Released September 23, 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.
WE SUPPORT VOLUNTARY
TECHNICIAN
CERTIFICATION