Complaints over time
Complaints about the 2014 Mack GU peaked in 2021, with 1 filed
Owner complaints about this model year, by the year they were filed with NHTSA.
Source: NHTSA ODI complaints file. The lighter column runs through October.
Model year
2014 Mack GU
Truck, diesel, built in United States. Owner complaints on file from Feb 16, 2021 to Feb 16, 2021.
Recall campaigns covering this model year0No recall campaign lists this model year
Owner complaints1Close to the median 2014 truck
Severity index100.02014 trucks average 28.6
First 24 months0Complaints in its first two years
Components
100% of complaints about the 2014 Mack GU name powertrain
Owner complaints by component. Hover or focus a bar for the crash, fire, injury or death count.
Source: NHTSA ODI complaints file. A complaint can name more than one component; it is counted under the first.
Recalls
No recall campaign lists the 2014 Mack GU
Check a specific vehicle by VIN on NHTSA's site: a campaign may cover only part of a model year's production.
Source: NHTSA ODI recalls file.
Owner complaints
What owners reported about the 2014 Mack GU
The full text of every complaint filed with NHTSA about this model year, newest first. Complaints are filed by owners and are not verified by NHTSA; NHTSA removes personal details before publishing.
1 complaint on file, page 1 of 1.
- Filed Feb 16, 2021Failure Nov 27, 2019Fort Lauderdale, FLPower trainCrash1 injured
THE DRIVE SHAFT OF THIS TRUCK FELL OFF ON NORTHBOUND I-95 WHILE IT WAS DRIVING.*DT*JB
NHTSA complaint 11396465
Source: NHTSA ODI complaints file.
Investigations
NHTSA has not opened an investigation on this model year
Source: NHTSA ODI investigations file.
Service bulletins
213 manufacturer communications cover this model year
Technical service bulletins and other notices the manufacturer sent to dealers. A bulletin is not a recall; the 60 most recent are listed.
- CBR-1008 202404 Apr 22, 2024 · Service Bulletin/Repair Instructions
CBR: Equipped With An Automated Manual Transmission Model D or F ( AMT-D, AMT-F, mDrive) Missing X1 Value In VDA And Default Settings Guidelines, ParameterP1AOB; Fault Code P1052-54, Error 40,Or Error 18 Encountered During Clutch Or Tran. - CBR-2350 202402 Feb 21, 2024 · Service Bulletin/Repair Instructions
CBR -Telematics Gateway (TGW) Connect Ability Issues - CBR-2347 202402 Feb 16, 2024 · Service Bulletin/Repair Instructions
CBR - Active "Set Park Brake" Message On Drivers Information Display (DID). - CBR-202 202402 Feb 16, 2024 · Service Bulletin/Repair Instructions
CBR - Automated Manual Transmission ( AMT ) Flywheel Pilot Bearing Wear On Input Shaft. - CBR-2014 202402 Feb 16, 2024 · Service Bulletin/Repair Instructions
CBR - Driveline Noise, Suspension Ride Height Too High, Suspension Will Not Exhaust - Chassis Built 2016w01 And Newer. - CBR-2333 202401 Jan 18, 2024 · Service Bulletin/Repair Instructions
CBR: TGW Will Not Connect After SIM Card Replacement - EC0028M 202312 Dec 1, 2023 · Service Bulletin/Repair Instructions
Emissions Campaign: Mack Trucks has determined that certain 2014 - 2018 commercial model year CXU, GU, LEU, LR, MRU Vehicles require a replacement Diesel Particulate Filter (DPF) along with updated software. - CBR-2320 202312 Dec 1, 2023 · Service Bulletin/Repair Instructions
CBR: For vehicles equipped with an 11L engine, the plastic saddle bracket holding the a/c line on the left side of the engine may move excessively and rub the area where it secures the line. - M-465-001 202311 Nov 7, 2023 · Service Bulletin/Repair Instructions
TSB: Mack Trucks now offer an improved HD Inter-Axle Through Shaft for the CRD 125, 150, 180, and 200 family carriers. The new HD shaft went into production on January 23rd, 2023 for 2.54 - 3.50 axle ratios and April 1st, 2023 for 3.56 - 3.98 ratios. The ne… - CBR-995 202310 Oct 19, 2023 · Service Bulletin/Repair Instructions
CBR: Telematics Gateway ( TGW, MID 142 ) Losing Communication With The Instrument Cluster ( IC ) - Counts Of Fault Code (FC) MID 140 PSID 239 FMI 12 Data Link, MID 142 Faulty Device or Component Logging, Possibly Following Engine Start. - M-258-014 202309 Sep 5, 2023 · Service Bulletin/Repair Instructions
TSB: Aftertreatment Diesel Exhaust Fluid (DEF) Tank, Level Sensor, Replacement - M728-005A 202308 Aug 14, 2023 · Service Bulletin/Repair Instructions
TSB: Barksdale Leveling Valve, Leak Test - M-141-001 202308 Aug 18, 2023 · Service Bulletin/Repair Instructions
TSB: Air Restriction Indicator - CBR-2112 202307 Jul 24, 2023 · Service Bulletin/Repair Instructions
CBR: Programming Failure - Chassis With Cummins Engine And An Allison Transmission - CBR-2303 202307 Jul 1, 2023 · Service Bulletin/Repair Instructions
CBR: Mack DEF Dosing Valve Diagnostic Trouble Codes (DTC) P202D00, P208E00, P103B00 - US10+OBD13 And Newer Emissions - SLM23-005 May 31, 2023 · Service Bulletin/Repair Instructions
Service Literature Published and Released in May, 2023 - KC-503-Ver3 May 17, 2023 · Service Bulletin/Repair Instructions
CBR: Automated Manual Transmission ( AMT ) -Transmission Electronic Control Unit ( TECU ) MID130 PSID 29 FMI 7 /P10AE81 Fault Codes Being Generated - KC-2229-Ver2 May 10, 2023 · Service Bulletin/Repair Instructions
CBR: Automated Manual Transmission (AMT) Transmission Kickdown Mode - KC-474-Ver5 May 2, 2023 · Service Bulletin/Repair Instructions
CBR: Diagnostic Trouble Code (DTC) P215A-64, Fault Code SPN 84 FMI 19 - M-170-003 Apr 18, 2023 · Service Bulletin/Repair Instructions
TSB: Vibration Diagnostics - M-170-001 Apr 18, 2023 · Service Bulletin/Repair Instructions
TSB: Stock Vehicle Storage and Maintenance - KC-2248 Feb 21, 2023 · Service Bulletin/Repair Instructions
Flywheel Housing Thread Repair - M-852-001 Dec 14, 2022 · Service Bulletin/Repair Instructions
2007 document reformatted to be published as a TSB in Impact. Lateral cab movement bracket. - M-728-001 Sep 22, 2022 · Service Bulletin/Repair Instructions
2008 Document reformatted to be published as a TSB in Impact. Air suspension ride height. - M-411-001 Sep 21, 2022 · Service Bulletin/Repair Instructions
2008 Document reformatted to be published as a TSB in Impact. Two-Piece clutch brake. - M-823-002 Sep 21, 2022 · Service Bulletin/Repair Instructions
2008 Document reformatted to be published as a TSB in Impact. Grille bar, replacment. - M-874-002 Sep 21, 2022 · Service Bulletin/Repair Instructions
2008 Document reformatted to be published as a TSB in Impact. HVAC fine particulate filter. - M-222-001 Sep 15, 2022 · Service Bulletin/Repair Instructions
2008 Document reformatted to be published as a TSB in Impact. Loose oil filter spud. - M-260-001 Sep 15, 2022 · Service Bulletin/Repair Instructions
2008 Document reformatted to be published as a TSB in Impact. Cooling system connections. - M-801-001 Sep 15, 2022 · Service Bulletin/Repair Instructions
2008 Document reformatted to be published as a TSB in Impact. Paint protection. - M-652-002 Sep 15, 2022 · Service Bulletin/Repair Instructions
2008 Document reformated to be published as a TSB in Impact. Torque rod interference. - M-823-001 Sep 15, 2022 · Service Bulletin/Repair Instructions
2008 Document reformated to be published as a TSB in Impact. Field repair for installing the grill. - M-374-001 Sep 15, 2022 · Service Bulletin/Repair Instructions
2008 Document reformated to be published as a TSB in Impact. Revised battery ti battery cable - M-265-002 Sep 22, 2022 · Service Bulletin/Repair Instructions
TSB-Charge Air Cooler t-clamp install. - M-255-016 Aug 19, 2022 · Service Bulletin/Repair Instructions
2009 Document reformatted to be published as a TSB in Impact. Turbo Actuator Connector Repair. - M-451-002 Aug 6, 2022 · Service Bulletin/Repair Instructions
2009 Document reformatted to be published as a TSB in Impact. Axle Carrier Pinion Angles - M-263-002 Jun 30, 2022 · Service Bulletin/Repair Instructions
2008 document reformatted to be published as a TSB in Impact. Fan Ring clearance for GU Model Truck. - KC-2112 Jun 21, 2022 · Service Bulletin/Repair Instructions
Programming Failure - Chassis With Cummins Engine And An Allison Transmission - KC-2116 Jun 3, 2022 · Service Bulletin/Repair Instructions
NOx Sensor Troubleshooting Guide - US10+OBD13 And Newer Emissions. - KC-2143 Jun 21, 2022 · Service Bulletin/Repair Instructions
(Back Office) - Cruise Control Inoperative After Updating Software VECU5 Without ESP Package (UESP). - KC-2158 Jun 3, 2022 · Service Bulletin/Repair Instructions
Selective Catalytic Reduction (SCR) Muffler Troubleshooting Guide - US10+OBD13 And Newer Emissions. - KC-2165 Jun 3, 2022 · Service Bulletin/Repair Instructions
DEF Pump Troubleshooting Guide - US10+OBD13 And Newer Emissions. - KC-405 Jun 21, 2022 · Service Bulletin/Repair Instructions
Warranty Automated Manual Transmission ( AMT, I-Shift, mDrive ) Control Housing Assembly; Guidelines For Filing A Claim For Chassis Return Visit With Transmission Issues After A Repair Requiring Control Housing Removal And Reinstallation - US07 And N. - KC-735 Jun 6, 2022 · Service Bulletin/Repair Instructions
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-745 Jun 22, 2022 · Service Bulletin/Repair Instructions
Automated Manual Transmission ( AMT ) I-Shift / mDRIVE - Ribbon Harness Replacement - Speed Sensor Bolts, Possible Fault Codes P1058 - 21 Or MID 130 PID 161 FMI 1 - KC-750 Jun 28, 2022 · Service Bulletin/Repair Instructions
US10 Emission Engines - Diagnostic Trouble Code ( DTC ) SPN 1231 FMI 9 Troubleshooting. - KC-751 Jun 28, 2022 · Service Bulletin/Repair Instructions
Vehicles Equipped With An Automated Manual Transmission Model D or F ( 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. - KC-663 May 18, 2022 · Service Bulletin/Repair Instructions
Emcon (Spark Assist) Engine Aftertreatment System Troubleshooting Check Sheet - US07 Emissions - KC-644 May 17, 2022 · Service Bulletin/Repair Instructions
Manual Compression Test Adapter For Engines With Stainless Steel Injector Sleeves (Conical Tip Injectors) - US07 And Newer Emissions, Model Year 2008 And Newer - KC-627 May 9, 2022 · Service Bulletin/Repair Instructions
Premium Tech Tool ( PTT ) Training Materials And Support Tools - KC-2172 May 16, 2022 · Service Bulletin/Repair Instructions
No Start Condition After Over The Air Programing - VECU5 No Start "Safe State" - KC-2171 May 26, 2022 · Service Bulletin/Repair Instructions
Temperature Sensor Troubleshooting Guide - US10+OBD13 And Newer - KC-2170 May 16, 2022 · Service Bulletin/Repair Instructions
Electronically Controlled Suspension (ECS) Losing Air Pressure - KC-2169 May 16, 2022 · Service Bulletin/Repair Instructions
Low Voltage Disconnect (LVD), Function Description - KC-2165 May 26, 2022 · Service Bulletin/Repair Instructions
DEF Pump Troubleshooting Guide - US10+OBD13 And Newer Emissions - KC-2161 May 13, 2022 · Service Bulletin/Repair Instructions
DEF Pump Cycling periodically Hours After Key Off - KC-2158 May 26, 2022 · Service Bulletin/Repair Instructions
Selective Catalytic Reduction (SCR) Muffler Troubleshooting Guide - US10+OBD13 And Newer Emissions - KC-2131 May 26, 2022 · Service Bulletin/Repair Instructions
USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E - KC-2116 May 26, 2022 · Service Bulletin/Repair Instructions
NOx Sensor Troubleshooting Guide - US10+OBD13 And Newer Emissions - KC-626 May 9, 2022 · Service Bulletin/Repair Instructions
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% When Run With Transmission Removed
Source: NHTSA manufacturer communications files.