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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

Only bulletins with component: Body and frame are shown. Show all

Bulletins, newest first
CBR 2429 2026082026-09-01. Service bulletin. STRUCTURE:BODY; ELECTRICAL SYSTEM. This CBR solution outlines the procedures for diagnosing, replacing, calibrating, and programming Flexible Switch Panels and the Security and Cab Interface Module (SCIM) to resolve switch malfunction notifications and associated fault codes.
CBR 2540-7 2026042026-05-05. Service bulletin. SEAT BELTS; STRUCTURE:BODY; UNKNOWN OR OTHER. CBR - Upper Bunk Restraint System – Plastic Gable Retention Field Fix.
S4866 0320262026-04-02. Service campaign. STRUCTURE:BODY. SC - Load Lock Clamp Install
S4808 0320262026-04-02. Service campaign. STRUCTURE:BODY. SC - Certain model PR’s could experience grille surround trim detaching due to insufficient retention.
CBR 2540-5 2026012026-02-03. Service bulletin. UNKNOWN OR OTHER; STRUCTURE:BODY. CBR - Upper Bunk Restraint System – Plastic Gable Retention Field Fix.
CBR 2399-9 2026012026-02-03. Service bulletin. STRUCTURE:BODY. CBR - Daycab Cab Roof Antenna Misalignment Causing Water Intrusion.
CBR 2540 2025122026-01-06. Service bulletin. STRUCTURE:BODY; UNKNOWN OR OTHER. Upper Bunk Restraint System – Plastic Gable Retention Field Fix
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.
S4373-2025022025-03-03. Service campaign. STRUCTURE:BODY; UNKNOWN OR OTHER. Mack Trucks has determined that certain Mack sleeper cab assemblies were possibly manufactured with an insufficient number of welds across the rear flange of the upper header. The reduced number of welds could lower the designed cab integrity.
CBR-2384 2024072024-08-01. Service bulletin. STRUCTURE:BODY. CBR: Mack Chassis - Day Cab Glass Breakage

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