Service bulletins for the 2020 Mack MD
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.
105 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
Only bulletins with component: Equipment and accessories are shown. Show all
| KC-735 | 2022-07-05. Service bulletin. EQUIPMENT. Premium Tech Tool (PTT) - Message For Data Mismatch, Product Configuration Mismatch; Instruction To Run An Accessory Kit Displayed When Attempting To Run Diagnostics For Diagnostic Trouble Codes (DTC) Or Programming - US10+OBD13 And Newer Emissions, |
|---|---|
| KC-627 | 2022-06-07. Service bulletin. EQUIPMENT. Premium Tech Tool ( PTT ) Training Materials And Support Tools |
| KC-651 | 2022-06-07. Service bulletin. EQUIPMENT. Mack Dealer Support Communication - Selecting The Proper SR Area For Creating An eService |
| KC-406 | 2022-02-04. Service bulletin. EQUIPMENT; FUEL SYSTEM, DIESEL. Dye Test Procedure; Fuel System Leak Check - Common Rail Fuel System - US17+OBD16 And Newer Emissions, Common Model Year 2018 And Newer |
| KC-391 | 2022-02-04. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Noise On The AM Radio Band; Thumping, Ticking, Fluttering Sound On AM Radio Band - Model Year 2018 And Newer |
| S7588 | 2021-08-02. Service bulletin. EQUIPMENT. Mack Medium Duty Refrigerant Label Replacement |
| FSB 491-032 | 2021-04-05. Service bulletin. EQUIPMENT; POWER TRAIN. Transmission Oil Cooler Hose, Replacement |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.