NHTSA ID Number: 11018070
Manufacturer Communication Number: 24-NA-094
TSB/Document Date: 2025-05-07
Summary
This technical bulletin provides repair information to correct a customer concern of LZ0 Engine Control Module Update.
Bulletin No.: 24-NA-094
Service Bulletin
Date: April, 2025
TECHNICAL
Subject:
LZ0 Engine Control Module Update
Brand:
Model:
Model Year:
from
to
Silverado 1500
2024
2024
Sierra 1500
2024
2024
VIN:
from
Engine:
to
Equipped with 3.0L
Engine (RPO LZO)
Involved Region or Country
North America, Europe, Middle East, Argentina (Mercosur), Brazil (Mercosur), Bolivia
(West), Chile (West), Colombia (West), Ecuador (West), Paraguay (West), Peru (West),
Uruguay (West), Philippines, Other Africa
Condition
Some customers may comment on a Malfunction Indicator Lamp illuminated in the DIC.
The cause of the condition may be a software anomaly.
Technician may find DTCs:
• P049D - Exhaust Gas Recirculation Valve Position Not Learned
• P11D5 - Nitrogen Oxides Sensor 2 Exceeded Minimum Learning Limit
• P138C – Warm Catalyst Heating Combustion Mode Performance
• P140C - Exhaust Gas Recirculation Valve Slow Response - Decreasing Flow
July 2024
• P1428 - Exhaust Gas Recirculation Temperature Sensor and Intake Air Temperature 2
Sensor Correlation
• P2002 - Particulate Filter Low Efficiency
• P20FE - Reductant Injector Performance - Low Reductant Consumption
• P2297 - Heated Oxygen Sensor Performance During Deceleration Fuel Cut-Off
• P22FE - Nitrogen Oxides Sensor 2 Performance - Sensing Element
• P22FB - Nitrogen Oxides Sensor Performance - Sensing Element
• P2463 - Particulate Filter Soot Accumulation
• P2459 - Particulate Filter Regeneration Frequency
• P0089 - Fuel Pressure Regulator Performance
• P049D - Exhaust Gas Recirculation Valve Position Not Learned
• P04FB – Crankcase Ventilation Hose Connection Pressure Sensor Performance
• P1004 - NOx Sensor 2 Slow Response
• P1098 - Engine Coolant Control Valve Position Sensor Minimum Stop Performance
(If P1098 is set, replace the CCV after updating the ECM)
Post-production
• P115E - Oxygen Reference Voltage Circuit (Nitrogen Oxides Sensor)
• P115F - Oxygen Reference Voltage Circuit Low (Nitrogen Oxides Sensor)
• P1160 - Oxygen Reference Voltage Circuit High (Nitrogen Oxides Sensor)
• P116A - Oxygen Signal Circuit (Nitrogen Oxides Sensor)
• P116B - Oxygen Signal Circuit Low (Nitrogen Oxides Sensor)
• P116C - Oxygen Signal Circuit High (Nitrogen Oxides Sensor)
• P116D - Oxygen Pump Current Control Circuit (Nitrogen Oxides Sensor)
• P116E - Oxygen Pump Current Control Circuit Low (Nitrogen Oxides Sensor)
Copyright 2025 General Motors
. All Rights Reserved.
Page 2
April, 2025
Bulletin No.: 24-NA-094
• P116F - Oxygen Pump Current Control Circuit High (Nitrogen Oxides Sensor)
• P1192 - Oxygen Low Reference Circuit (Nitrogen Oxides Sensor)
• P1193 - Oxygen Low Reference Circuit Low (Nitrogen Oxides Sensor)
• P1194 - Oxygen Low Reference Circuit High (Nitrogen Oxides Sensor)
• P119A - Nitrogen Oxides Sensor Signal Circuit
• P119B - Nitrogen Oxides Sensor Signal Circuit Low
• P119C - Nitrogen Oxides Sensor Signal Circuit High
• P119D - Nitrogen Oxides Sensor 2 Signal Circuit
• P119E - Nitrogen Oxides Sensor 2 Signal Circuit Low
• P119F - Nitrogen Oxides Sensor 2 Signal Circuit High
• P11BE - Oxygen Reference Voltage Circuit (Nitrogen Oxides Sensor 2)
• P11BF - Oxygen Reference Voltage Circuit Low (Nitrogen Oxides Sensor 2)
• P11C0 - Oxygen Reference Voltage Circuit High (Nitrogen Oxides Sensor 2)
• P11C7 - Nitrogen Oxides Sensor 2 Heater Ground Circuit
• P11C8 - Nitrogen Oxides Sensor 2 Heater Ground Circuit High
• P11D0 - Oxygen Signal Circuit (Nitrogen Oxides Sensor 2)
• P11D1 - Oxygen Signal Circuit Low (Nitrogen Oxides Sensor 2)
• P11D2 - Oxygen Signal Circuit High (Nitrogen Oxides Sensor 2)
• P11D8 - Oxygen Pump Current Control Circuit (Nitrogen Oxides Sensor 2)
• P11D9 - Oxygen Pump Current Control Circuit Low (Nitrogen Oxides Sensor 2)
• P11DA - Oxygen Pump Current Control Circuit High (Nitrogen Oxides Sensor 2)
• P11DC - Nitrogen Oxides Sensor 2 Current Performance
• P11FC - Oxygen Low Reference Circuit (Nitrogen Oxides Sensor 2)
• P11FD - Oxygen Low Reference Circuit Low (Nitrogen Oxides Sensor 2)
• P11FE - Oxygen Low Reference Circuit High (Nitrogen Oxides Sensor 2)
• P1388 - Nitrogen Oxides Sensor 3 Signal Circuit
• P1389 - Nitrogen Oxides Sensor 3 Signal Circuit Low
• P138A - Nitrogen Oxides Sensor 3 Signal Circuit High
• P138C - Warm Catalyst Heating Combustion Mode Performance
• P140C - Exhaust Gas Recirculation (EGR) Slow Response - Decreasing Flow
• P1428 - Exhaust Gas Recirculation Temperature Sensor and Intake Air Temperature 2
Sensor Correlation
• P14AC - Oxygen Signal Circuit High (Nitrogen Oxides Sensor 3)
• P14AD - Oxygen Pump Current Control Circuit (Nitrogen Oxides Sensor 3)
• P14AE - Oxygen Pump Current Control Circuit Low (Nitrogen Oxides Sensor 3)
• P14AF - Oxygen Pump Current Control Circuit High (Nitrogen Oxides Sensor 3)
• P14B0 - Oxygen Low Reference Circuit (Nitrogen Oxides Sensor 3)
• P14B1 - Oxygen Low Reference Circuit Low (Nitrogen Oxides Sensor 3)
• P14B2 - Oxygen Low Reference Circuit High (Nitrogen Oxides Sensor 3)
• P14B3 - Nitrogen Oxides Sensor 3 Heater Ground Circuit
• P16F4 - Control Module Transmission Range Switch Input Circuitry Performance
• P2002 - Particulate Filter Low Efficiency
• P20FE - Reductant Injector Performance - Low Reductant Consumption
• P2202 - Nitrogen Oxides Sensor Circuit Low
• P2203 - Nitrogen Oxides Sensor Circuit High
• P2205 - Nitrogen Oxides Sensor Heater Control Circuit
• P2206 - Nitrogen Oxides Sensor Heater Control Circuit Low
• P2207 - Nitrogen Oxides Sensor Heater Control Circuit High
Bulletin No.: 24-NA-094
April, 2025
Page 3
• P2208 - Nitrogen Oxides Sensor Heater Feedback Circuit
• P2209 - Nitrogen Oxides Sensor Heater Feedback Performance
• P220A - Nitrogen Oxides Sensor Supply Voltage Circuit
• P220B - Nitrogen Oxides Sensor 2 Supply Voltage Circuit
• P2210 - Nitrogen Oxides Sensor Heater Feedback Circuit Low
• P2211 - Nitrogen Oxides Sensor Heater Feedback Circuit High
• P228A - Fuel Pressure Regulator Control - Forced Engine Shutdown
• P228B - Fuel Pressure Regulator 2 Control - Forced Engine Shutdown
• P228C - Fuel Pressure Regulator Control Performance - Low Pressure
• P228D - Fuel Pressure Regulator Control Performance - High Pressure
• P2297 - Heated Oxygen Sensor Performance During Deceleration Fuel Cut-Off
• P229F - Nitrogen Oxides Sensor 2 Performance
• P2293 - Fuel Pressure Regulator 2 Performance
• P22A0 - Nitrogen Oxides Sensor 2 Circuit Low
• P22A1 - Nitrogen Oxides Sensor 2 Circuit High
• P22A3 - Nitrogen Oxides Sensor 2 Heater Control Circuit
• P22A4 - Nitrogen Oxides Sensor 2 Heater Control Circuit Low
• P22A5 - Nitrogen Oxides Sensor 2 Heater Control Circuit High
• P22A6 - Nitrogen Oxides Sensor 2 Heater Feedback Circuit
• P22B6 - Heated Oxygen Sensor 2 Pump Current Trim Circuit Low
• P22B7 - Heated Oxygen Sensor 2 Pump Current Trim Circuit High
• P22FB - Nitrogen Oxides Sensor Performance - Sensing Element
• P22FE - Nitrogen Oxides Sensor 2 Performance - Sensing Element
• P23AE - Nitrogen Oxides Sensor 3 Circuit Low
• P23AF - Nitrogen Oxides Sensor 3 Circuit High
• P23B1 - Nitrogen Oxides Sensor 3 Heater Control Circuit
• P23B2 - Nitrogen Oxides Sensor 3 Heater Control Circuit Low
• P23B3 - Nitrogen Oxides Sensor 3 Heater Control Circuit High
• P23B4 - Nitrogen Oxides Sensor 3 Heater Feedback Circuit
• P23B6 - Nitrogen Oxides Sensor 3 Supply Voltage Circuit
• P23B8 - Nitrogen Oxides Sensor 3 Heater Feedback Circuit Low
• P23B9 - Nitrogen Oxides Sensor 3 Heater Feedback Circuit High
• P23C1 - Nitrogen Oxides Sensor 3 Performance - Sensing Element
• P242D - Exhaust Gas Temperature Sensor 3 Circuit High — Internal Component Fault
• P242E - Exhaust Gas Temperature Sensor 3 Circuit Intermittent — Internal Component Fault
• P2459 - Particulate Filter Regeneration Frequency
• P2463 - Particulate Filter Soot Accumulation
• P24B0 - Particulate Matter Sensor Circuit Low
• P24C7 - Particulate Matter Sensor Temperature Circuit Performance
• P2EAD - Reductant Injector 2 Performance - Low Reductant Consumption
Cause
These condition(s) may be caused by a software anomaly.
Correction
Update the ECM with the latest calibration. If no new calibrations are available, refer to SI
diagnostics.
Page 4
April, 2025
Bulletin No.: 24-NA-094
Service Procedure
Important: Service agents must comply with all International, Federal, State, Provincial, and/or Local laws
applicable to the activities it performs under this bulletin, including but not limited to handling, deploying,
preparing, classifying, packaging, marking, labeling, and shipping dangerous goods. In the event of a
conflict between the procedures set forth in this bulletin and the laws that apply to your dealership, you
must follow those applicable laws.
Version
2
Modified
Released May 30, 2024
Revised April 10, 2025– Updated the correction and cause and added DTC’s to Postproduction sections— Removed Service Procedure and Labor Operation.
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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TSB/Document ID: 24-NA-094
Replacement Service Bulletin Number:
MFR Communication Date: 2025-04-11
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
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