# Service bulletin CBR 2399\-9 202601

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.

- Type: Service bulletin
- NHTSA id: 11028038
- Published by NHTSA: 2026\-02\-03
- Manufacturer's number: CBR 2399\-9 202601
- Manufacturer's date: 2026\-01\-21
- NHTSA component: STRUCTURE:BODY

## NHTSA's summary

CBR \- Daycab Cab Roof Antenna Misalignment Causing Water Intrusion.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11028038-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11028038-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Body and frame

## Vehicles listed

- 2025 MACK PIONEER PR \(4\)

## Recalls for the same vehicles and component

- [26V631000](/recalls/nhtsa/26V631000.md), 2026-10-01: STRUCTURE:BODY:BUMPERS:ACTIVE SHUTTERS/GRILL; STRUCTURE:EXTERIOR TRIM

## Other bulletins for the same vehicles and component

- [CBR 2429 202608](/bulletins/11036583.md), 2026-09-01, 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 202604](/bulletins/11032088.md), 2026-05-05, Service bulletin: SEAT BELTS; STRUCTURE:BODY; UNKNOWN OR OTHER. CBR \- Upper Bunk Restraint System – Plastic Gable Retention Field Fix.
- [S4866 032026](/bulletins/11030594.md), 2026-04-02, Service campaign: STRUCTURE:BODY. SC \- Load Lock Clamp Install
- [S4808 032026](/bulletins/11030593.md), 2026-04-02, Service campaign: STRUCTURE:BODY. SC \- Certain model PR’s could experience grille surround trim detaching due to insufficient retention.
- [CBR 2540\-5 202601](/bulletins/11028048.md), 2026-02-03, Service bulletin: UNKNOWN OR OTHER; STRUCTURE:BODY. CBR \- Upper Bunk Restraint System – Plastic Gable Retention Field Fix.
- [CBR 2540 202512](/bulletins/11027012.md), 2026-01-06, Service bulletin: STRUCTURE:BODY; UNKNOWN OR OTHER. Upper Bunk Restraint System – Plastic Gable Retention Field Fix
- [CBR 2500 092025](/bulletins/11023454.md), 2025-10-01, 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\-202502](/bulletins/11014712.md), 2025-03-03, 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 202407](/bulletins/11005412.md), 2024-08-01, Service bulletin: STRUCTURE:BODY. CBR: Mack Chassis \- Day Cab Glass Breakage

JSON: [/v1/bulletins/11028038](/v1/bulletins/11028038)

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