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Service bulletin KC-345

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10198737
Published by NHTSA2021-07-02
Manufacturer's numberKC-345
Manufacturer's date2021-06-16
NHTSA componentSTEERING

NHTSA's summary

Mack Chassis - Models GU / GR - Constant Correction To Center

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Steering

Vehicles listed
MACK GRANITE (GR)2016
MACK GRANITE (GR)2017, 2018, 2019, 2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it)
MACK GU

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20222952022-06-07. Steering
22V4010002022-06-07. STEERING
21V8560002021-11-03. STEERING:HYDRAULIC POWER ASSIST:PUMP
19V8960002019-12-16. STEERING:LINKAGES:DRAG:LINK:CONNECTION
18V7780002018-11-01. STEERING
16V0980002016-02-19. STEERING

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
SLM22-0042022-05-06. Service bulletin. Service Literature Published and Released in April, 2022
KC-3452022-02-04. Service bulletin. Mack Chassis - Models GU / GR - Constant Correction To Center
S75802021-05-04. Service bulletin. V Stay Apex Housing Premature Failure
S75452020-12-01. Service bulletin. Draglink Split Pin Inspection
K285015522019-02-19. Service bulletin. Mack Chassis - Models GU / CHU Steering Wander
K615106582018-07-16. Service bulletin. Mack Chassis - Equipped With An Automated Manual Transmission Model F (AMT-F, mDrive) With Crawler Gears - Setting The Maximum Gear That Can Be (Temporarily) Selected For Starting From Stop In Automatic And Manual Modes; New Parameters For Maximum Adjustable Gear In Automatic And Manual Modes; US17+OBD16 And Newer Emissions, Commonly Model Year 2018 And Newer
K313781532018-07-16. Service bulletin. Mack Chassis - Vehicles Equipped With An Automated Manual Transmission Model F ( AMT-F, mDrive ), Premium Tech Tool ( PTT ) Gearbox Calibration Failure; Gearbox Calibration Operation Stops And Fails At 33% - US17+OBD16 (GHG17) And Newer Emissions, Common Model Years 2018 And Newer
K486615442018-03-12. Service bulletin. Chassis Equipped With An AMT-F (mDrive) - Idle Drive Function Activates When Vehicle Is Reversing/Backing Up At Low Speed; Information And Repair - Build Date Beginning Of Production 2017 To February 2018