Service bulletins for the 2021 Mack LR
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.
163 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
Only bulletins with component: Suspension are shown. Show all
| CBR-2016 202412 | 2025-01-02. Service bulletin. SUSPENSION. Frame lean can be caused by several seemingly isolated possibilities. The two most common are suspension and frame assembly issues. |
|---|---|
| CBR-2014 202402 | 2024-03-05. Service bulletin. SUSPENSION. CBR - Driveline Noise, Suspension Ride Height Too High, Suspension Will Not Exhaust - Chassis Built 2016w01 And Newer. |
| M728-005A 202308 | 2023-09-06. Service bulletin. SUSPENSION. TSB: Barksdale Leveling Valve, Leak Test |
| KC-2292 | 2023-07-06. Service bulletin. SUSPENSION. Vehicles Equipped With Chalmers Suspension - Frame Bracket Hardware Loose or Interfering |
| KC-2244 | 2023-03-07. Service bulletin. STRUCTURE:FRAME AND MEMBERS; SUSPENSION. Mack Model TE,LR - Frame Over Height |
| KC-2170 | 2022-06-07. Service bulletin. SUSPENSION. Electronically Controlled Suspension (ECS) Losing Air Pressure |
| S7610 | 2021-11-05. Service bulletin. SERVICE BRAKES, AIR; SERVICE BRAKES, AIR:SLACK ADJUSTERS; SUSPENSION:SUBFRAME/MOUNTING BRACKET. Bump Stop Interference with Brake Slack |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.