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Service bulletins for the 2005 Mack CHN

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.

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

By type

By component

By trouble code

Bulletins, newest first
FSB-214-0242011-08-15. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. MACK TRUCKS: THERE IS REVISED MOUNTING HARDWARE FOR THE EXHAUST MANIFOLD AND TURBOCHARGER. *RM
SC-3342010-03-04. Service bulletin. SERVICE BRAKES, AIR:SUPPLY:CHECK VALVE. MACK TRUCK: IT HAS BEEN DETERMINED THAT THE 90 DEGREE SINGLE CHECK VALVE FITTING MANUFACTURED BY PARKER HANNIFIN CORP. WHICH IS USED IN THE SUPPLY PORT OF THE SPRING BRAKE MODULATING RELAY VALVE (BENDIX SR 7 VALVE) MAY HAVE A DEFECT WHEREBY THE VALVE BODY RETAINER MAY BECOME EXCESSIVELY WORN AND EVENTUALLY BREAK APART. MODELS CXU, CXP, CXN, CHU, CHN, GU, CTP, CT, CV, MRU, AND LEU. 1/1/04-11/3/05 AND 5/2/07-7/26/07. *PE
TSB-5170092009-08-27. Service bulletin. POWER TRAIN:AXLE ASSEMBLY. MACK TRUCK: BROKEN LONGITUDINAL TORQUE ROD MOUNTING STUD IN AXLE SPRING SEAT DUE TO WING BRACKET INTERFERENCE. THIS INCLUDES THE TD MODEL. NO MODEL YEARS LISTED. *PE
SB-26-10182009-05-22. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. MACK TRUCKS: MERITOR WABCO AIR COMPRESSOR, CONVENTIONAL REPAIR FOR CERTAIN AIR COMPRESSOR FAILURES, SUCH AS FAILURE OF COMPRESSOR TO PUMP, SLOW AIR SYSTEM PRESSURE BUILD UP TIME, INTERMITTENT COMPRESSOR PUMPING, ETC, WAS TO REPLACE COMPRESSOR CYLINDER HEAD. MODEL YEARS UNKNOWN. *PE
SB-1210422008-09-13. Service bulletin. STRUCTURE:FRAME AND MEMBERS. MACK TRUCK: CRACKS IN UPPER FRAME FLANGE AT STEERING GEAR CUT-OUT - ALL CHN MODELS. (NOT APPLICABLE TO MACK TRUCKS AUSTRALIA). *PE
1210312006-09-21. Service bulletin. SUSPENSION. SUSPENSION CROSSMEMBERS - CXN AND CHN MODELS EQUIPPED WITH MACK AL SUSPENSION. *TT
1220032006-09-12. Service bulletin. STRUCTURE:FRAME AND MEMBERS:UNDERBODY SHIELDS. FRAME TIE BAR MOUNTING BRACKETS - CHN MODEL CHASSIS. MACK. *TT

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