Power Brake Booster Vacuum Pipe Replacement, DTCs C025E, C0299, P050F, P0556, P0557, P0558 and/or P0561 Set – 2014-2019 Chevrolet Impala & Malibu

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Copyright 2022 General Motors LLC. All Rights Reserved. Service Bulletin Bulletin No.: 21-NA-045 Date: October, 2022 TECHNICAL Subject: Power Brake Booster Vacuum Pipe Replacement, DTCs C025E, C0299, P050F, P0556, P0557, P0558 and/or P0561 Set Brand: Model: Model Year: VIN: Engine: Transmission: from to from to Chevrolet Impala 2014 2019 — — 2.5L (RPOs LCV, LKW) All Malibu Involved Region or Country North America, Russia, Middle East, Israel, Argentina, Brazil, Bolivia, Chile, Colombia, Ecuador, Paraguay, Peru, Uruguay, Japan, GM Korea Company, China, Taiwan, Philippines Condition The purpose of this bulletin is to inform dealership personnel that a new power brake booster vacuum cap will need to be replaced when installing the revised power brake booster vacuum pipe. Technicians may find one or more of the following DTCs set: • C025E – Brake Booster Vacuum Sensor Circuit • C0299 – Brake Booster Large Vacuum Leak Detected • P050F – Brake Booster Weak Vacuum • P0556 – Brake Booster Pressure Sensor Performance • P0557 – Brake Booster Pressure Sensor Circuit Low Voltage • P0558 – Brake Booster Pressure Sensor Circuit High Voltage • P0561 – System Voltage Performance Cause This condition may be caused by the routing of the original power brake booster vacuum pipe from the factory. Page 2 October, 2022 Bulletin No.: 21-NA-045 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. Refer to Power Brake Booster Vacuum Pipe Replacement in SI. Note: Technicians need to replace the connector for the new vacuum pipe using the connector kit listed in the Parts Information. Note: The vacuum cap must be placed on the existing intake manifold port to plug off. Note: Clear DTCs and verify vacuum values with a scan tool. Parts Information Causal Part Description Part Number Qty X PIPE ASM-P/B BOOS VAC 23465287 CAP, P/B BOOS VAC TUBE 23150684 1 CONNECTOR KIT, BODT WRG HARN (CRANKSHAFT POSITION SENSOR) 19371207 Warranty Information Repairs made for the specific concern within this bulletin may be covered under the vehicle’s New Vehicle Limited Warranty “Bumper-to-Bumper” terms (Canada Base Warranty). Refer to the vehicle’s Limited Warranty and Owner Assistance Information booklet for coverage details. Labor Operation Description Labor Time 2441640 Power Brake Booster Vacuum Pipe Replacement Use Published Labor Operation Time 5430880 Connector with Leads Assembly Replacement Version 3 Modified Released March 19, 2021 Revised September 02, 2022 – Removed Europe from Involved Region or Country section and updated the Parts Information. Revised October 11, 2022 – Added an Important statement and the first Note under Service Procedure and updated Warranty Information. 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

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