Vehicle report

2026 MACK PINNACLE (PI/PN)

Service bulletins

13 bulletins

Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.

CBR 159 202608

Service Bulletin/Repair Instructions

Mack Trucks Equipped With A Cummins Engine - Engine Preheat Icon Does Not Illuminate In The Instrument Cluster (IC) During Engine Pre-heat (Intake Air Heater) Operation - Vehicles With 2018Instrument Cluster Update, Model Year2018 And Newer

CBR-2592-1 202606

Service Bulletin/Repair Instructions

The purpose of this CBR is to provide steps on how to correct a customer complaint of DTC P107B86 accompanied With intermittent loss of throttle.

CBR 2362-3 202604

Service Bulletin/Repair Instructions

CBR - Mack Carrier Nut Adhesive Change.

CBR 2573-1 202604

Service Bulletin/Repair Instructions

CBR - Mack Chassis - Through Shaft Bearing Retainer Breakage On Mack Carriers.

CBR 2712-7 032026

Service Bulletin/Repair Instructions

CBR - No Start Condition After Over the Air Programing.

CBR 2246-5 032026

Service Bulletin/Repair Instructions

CBR - Z Spring Bracket Wear.

CBR 199 202512

Service Bulletin/Repair Instructions

Vehicles affected by this issue will show coolant runoff on the front rights side of the engine.

CBR 2171-11 202511

Service Bulletin/Repair Instructions

CBR - Mack Temperature Sensor Troubleshooting Guide

CBR 199-6 202511

Service Bulletin/Repair Instructions

CBR - 13 Liter Engines ONLY - Engine Coolant Pump Housing Leak; Coolant Found Around The Oil Cooler Duct Cover Or In Between The Coolant Pump Housing And Oil Cooler Housing.

CBR 2517-1 102025

Service Bulletin/Repair Instructions

CBR - Wiper Linkage Inspection.

S4579 092025

Service Campaign

Mack Trucks has identified that certain truck models may have been assembled with incorrect center bearing mounting hardware and could have been torqued incorrectly. Improper torque can increase the risk of hardware failure. To address this issue, please follow the instructions in this document to replace and correctly torque the center bearing and center bearing mounting bracket hardware.

S4584 092025

Service Campaign

The vehicle’s steering shaft support bracket may have been assembled with incorrect hardware.

CBR 2172-5 082025

Service Bulletin/Repair Instructions

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.

Reading this report

Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.

2026 Mack Pinnacle (pi/Pn) Service Bulletins: 13 bulletins | CarFathom