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Service bulletins for the 2025 Mack Pioneer

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

155 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Bulletins, newest first
CBR 2511-1 1020252025-11-03. Service bulletin. ELECTRICAL SYSTEM. CBR - Inverter Low/No Power Shutoff Bypass
CBR 2505 0920252025-10-01. Service bulletin. ELECTRICAL SYSTEM. The purpose of this CBR is to address the issue with Eco Roll disable switch notworking.
CBR 2504 0920252025-10-01. Service bulletin. UNKNOWN OR OTHER; VISIBILITY/WIPER. Some vehicles may have reverse cameras not properly assigned from the factory.
CBR 2503 0920252025-10-01. Service bulletin. SERVICE BRAKES. The purpose of this CBR is to outline the steps for adjusting brake pedal freeplay following Foot Brake Modulator (FBM) replacement or when diagnostic code C10C3-77is present.
CBR 2502 0920252025-10-01. Service bulletin. ELECTRICAL SYSTEM. This CBR solution provides guidelines for ensuring the correct position of battery sensor modules and battery sensor harnesses on the Mack PR (4) and AN (4) chassis, as well as the Battery Sensor Diagnostic and Calibration Procedure.
CBR 2500 0920252025-10-01. Service bulletin. STRUCTURE:BODY; UNKNOWN OR OTHER. This procedure describes the standardized method for repairing failed inserts pulled out of a table surface. It applies only when the receiving hole is not significantly damaged. Acceptable conditions include surface fraying or peeling at the painted layer only, with no full-depth cracking.
CBR 2497 0920252025-10-01. Service bulletin. ELECTRICAL SYSTEM. Electronic control units on the VN(4), PR (4) and AN (4) contain information that is critical for vehicle functionality, maintaining vehicle life data, and maintaining vehicle compliance. Because of this, swapping ECUs from truck to truck even for diagnostic purposes may cause functional or compliance complications that may or may not be apparent.
CBR 2496 0920252025-10-01. Service bulletin. ELECTRICAL SYSTEM. The purpose of this CBR is outline the interim software solution for PR(4) andAN(4). Note that this document is subject to updates and currently covers Service Pack updates to B2_T2_1.2.
CBR 2482 0920252025-10-01. Service bulletin. ELECTRICAL SYSTEM. Purpose of this CBR is to address Pop up message for PTO Malfunction when there is no PTO Installed.
CBR 2465 0920252025-10-01. Service bulletin. ELECTRICAL SYSTEM. This CBR pertains to two issues that may arise with the Proactive Engine Restart (Remote Engine Start System).
CBR 2408 0920252025-10-01. Service bulletin. UNKNOWN OR OTHER; ENGINE. This document provides guidance for addressing the APM DTC C10129B fault," High/Excessive Flow" This fault was introduced by a previous APM software package and requires specific containment actions.
GDC25-012 0920252025-09-29. Service bulletin. EXTERIOR LIGHTING. Lighting DTC list
GDC25-011 0920252025-09-29. Service bulletin. FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL. Adaptive Cruise Control Issue
GDC25-010 0920252025-09-29. Service bulletin. ENGINE. Engine Coolant Level Low - Elevated Coolant & Oil Temperature
GDC25-009 0920252025-09-29. Service bulletin. ENGINE. Engine Oil Pressure Too Low
GDC25-008 0920252025-09-29. Service bulletin. ENGINE. Engine Coolant Over Temperature
GDC25-007 0920252025-09-29. Service bulletin. FUEL/PROPULSION SYSTEM. Reductant Injection Valve Control Bank 1 Unit 1 - Circuit Open
GDC25-006 0920252025-09-29. Service bulletin. ENGINE. Engine Oil Over Temperature
GDC25-005 0920252025-09-29. Service bulletin. ENGINE. Exhaust Gas Temperature Sensor Circuit Short to Battery or Open
GDC25-004 0920252025-09-29. Service bulletin. FUEL/PROPULSION SYSTEM. Reductant Pressure Sensor - Circuit Open
GDC25-003 0920252025-09-29. Service bulletin. FUEL/PROPULSION SYSTEM. Reductant Return: No Flow Detected
GDC25-002 0920252025-09-29. Service bulletin. FUEL/PROPULSION SYSTEM. Low Fuel Pressure
GDC25-001 0920252025-09-29. Service bulletin. ENGINE. Particulate Filter Restriction - Soot Accumulation Bank 1
CBR 2491-1 0820252025-09-02. Service bulletin. ELECTRICAL SYSTEM. CBR - The purpose of this CBR is to provide instructions when fault code U300056: Electronic Control Unit, Invalid/Incompatible Configuration for the RCIOM is active.
CBR 2172-5 0820252025-09-02. Service bulletin. ELECTRICAL SYSTEM. CBR - When an OTA (Over-The-Air) job starts to program the VECU blocks the starter relay out, if the job ends in a Critical failure, the vehicle will remain in Safe State.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.