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Service bulletins for the 2020 Mack Anthem

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.

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

By type

By component

By trouble code

Bulletins, newest first
K705703422019-12-09. Service bulletin. POWER TRAIN. Mack Chassis - Equipped With An Allison Transmission: Enable 6th Speed - All Emissions, All Model Years
K582036032019-12-09. Service bulletin. ENGINE AND ENGINE COOLING. Diagnostic Trouble Code (DTC) P20EE - SCR NOx Catalyst Efficiency Below Threshold (Bank 1) - US17+OBD2019 Emissions, Model Year 2020 ONLY
K208781182019-12-09. Service bulletin. EQUIPMENT. Diagnostic Trouble Codes ( DTC ) P205B-64 - Reductant Tank Temperature Sensor Circuit Range/Performance - Model Year 2018 and Newer
K630010422019-12-09. Service bulletin. VISIBILITY. Mack Chassis - SNM16 - 015 Updated Wiper Mechanism for One Piece Windshield; Windshield Wipers Leaving Streaks Or Not Clearing Center Of Windshield
K809300882019-12-09. Service bulletin. ENGINE AND ENGINE COOLING. Diagnostic Trouble Codes ( DTC ) P0016-76 - Crankshaft Position - Camshaft Position Correlation - Turbo Compound ( TC ) - Model Year 2018 and Newer
K732415832019-10-28. Service bulletin. EXTERIOR LIGHTING. Mack Chassis - Anthem (AN) Models - Headlight Diagnostics And Replacement; Instructions For Non-Functioning Headlight Or Turn Signal In Headlight Housing
K267020622019-10-28. Service bulletin. ENGINE AND ENGINE COOLING. Diagnostic Trouble Code (DTC) P229F-64; Diagnostic Information - US10+OBD2013 Emissions And Newer
K822062022019-10-28. Service bulletin. SERVICE BRAKES, HYDRAULIC. Mack Chassis - Conventional Models (Anthem, Pinnacle, Granite) - Service Brakes Fail To Release; Brakes Sticking After Brake Pedal Is Released - Built Between 1 November 2018 And 31 March 2019
K39135131-12019-10-28. Service bulletin. ELECTRICAL SYSTEM. Diagnostic Trouble Code (DTC) P215A-64, Fault Code SPN 84 FMI 19; Speedometer Drop-Out, Speedometer Inoperative
K905004252019-10-28. Service bulletin. ENGINE AND ENGINE COOLING. AMT-F Oil In Control Housing Or TECU
K059135802019-10-28. Service bulletin. ENGINE AND ENGINE COOLING. 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 - Model Years 2019 And 2020
K212505792019-10-28. Service bulletin. POWER TRAIN. Mack Chassis - Equipped With An Automated Manual Transmission Model D or F (mDrive, AMT-D, AMT-F) - Transmission Oil Leakage From Transmission Input Shaft Seal Or Output Shaft Seal - US10 And Newer Emissions, Common Model Years 2010 And Newer
K595542552019-09-30. Service bulletin. EXTERIOR LIGHTING; BACK OVER PREVENTION. Mack Chassis - Particulate Matter (PM) Sensor Diagnostic Trouble Codes (DTC) Illuminating The Malfunction Indicator Lamp (MIL); Tech Tip TT-014-2016 - US14+OBD16, US17+OBD16 And Newer Emissions, Common Model Year 2017 And Newer - To Be Used For EVERY Visit
K655277082019-08-19. Service bulletin. EQUIPMENT. Diagnostic Trouble Codes (DTC) P20EE And P103C, Diagnostic Procedure; REPLACES GUIDED DIAGNOSTICS IN PREMIUM TECH TOOL ( PTT ) - US17+OBD16 And Newer Chassis ONLY
PI08882019-08-19. Service bulletin. STRUCTURE. For certain MACK CXU and AN trucks built between 08/29/2016 and 01/25/2019, a new improved torque procedure has been introduced to maintain and distribute torque properly on the hardware attaching the Link auxiliary axle to the frame mounted brackets. Follow the repair instructions outlined in this document for re-torquing the indicated nuts or bolts.
K595542552019-07-15. Service bulletin. EQUIPMENT. Mack Chassis - Particulate Matter (PM) Sensor Diagnostic Trouble Codes (DTC) Illuminating The Malfunction Indicator Lamp (MIL); Tech Tip TT-014-2016 - US14+OBD16, US17+OBD16 And Newer Emissions, Common Model Year 2017 And Newer - To Be Used For EVERY Visit
K933944302019-07-15. Service bulletin. ELECTRICAL SYSTEM. Engine Brake - Diagnostic Trouble Code (DTC) P1021-11 Volvo Compression Brake (VCB) Control Circuit Short To Ground - US17+OBD16 Through US17+OBD19 Emissions, Model Years 2018 To 2020
FSB728-0052019-07-15. Service bulletin. SUSPENSION. Leveling Valve, Leak Test
k230235452019-07-15. Service bulletin. EQUIPMENT. Wabco System Saver? HP High Performance Air Dryer - US17 +OBD2019 Emissions, Model Year 2020
K212505792019-07-15. Service bulletin. POWER TRAIN. Mack Chassis - Equipped With An Automated Manual Transmission Model D or F ( mDrive, AMT-D, AMT-F ) - Transmission Oil Leakage From Transmission Input Shaft Seal Or Output Shaft Seal - US10 And Newer Emissions, Common Model Years 2010 And Newer
K869000432019-07-15. Service bulletin. ENGINE AND ENGINE COOLING. Exhaust Gas Recirculation (EGR) System - Fault Codes SPN 412 FMI 0,2,5; Diagnostic Trouble Codes (DTC) P040A, P040B, P1121 - Temperature Sensor Inspection
K102163902019-07-01. Service bulletin. POWER TRAIN; EQUIPMENT. ** Tech Tip ** - TT-019-2016 Automated Manual Transmission ( AMT ) Bearing And Gear Shaft Inspection
K150888042019-07-01. Service bulletin. POWER TRAIN. Mack Chassis - Equipped With An I-Shift Transmission - Transmission Bucking While in Reverse Gear; Vehicle Jerks In Reverse
K494750022019-07-01. Service bulletin. SERVICE BRAKES. Mack Chassis - Brake Lamps Do Not Illuminate During Engine Brake Activation - US17+OBD16 and Newer Emissions
K014356092019-07-01. Service bulletin. ELECTRICAL SYSTEM; VEHICLE SPEED CONTROL. Adaptive Cruise Control ECU Fault In The Driver Information Display (DID) At Start Up; "Missing Communication From Adaptive Cruise Control ECU" Message In Cluster (MID 140 PSID 211 FMI 9) - Model Year 2018 And Newer

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