Complaints over time
Complaints about the 2018 Mack GU peaked in 2022, 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
2018 Mack GU
Heavy truck, diesel, built in United States. Owner complaints on file from Apr 15, 2022 to Apr 15, 2022.
Recall campaigns covering this model year0No recall campaign lists this model year
Owner complaints1Below the median 2018 heavy truck
Severity index0.02018 heavy trucks average 17.8
First 24 months0Complaints in its first two years
Components
100% of complaints about the 2018 Mack GU name electrical system
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 2018 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 2018 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 Apr 15, 2022Failure Jan 15, 2019Crystal city, TXElectrical system, Exterior lighting, Visibility/wiper
Wipers do not work and the tractor lights turn off ALL of the lights the trailer lights go out as well the fuse for these electrical components gets very hot, this makes it very dangerous when driving at night and when it's raining. The driver has to pull over till he can get the lights to come back on
NHTSA complaint 11460974
Source: NHTSA ODI complaints file.
Investigations
NHTSA has not opened an investigation on this model year
Source: NHTSA ODI investigations file.
Service bulletins
243 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-2013 202404 Apr 2, 2024 · Service Bulletin/Repair Instructions
CBR: Turbo Compound (TC) Hot Side Noise, Diagnostic Information. - 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 - CBR-2016 202401 Jan 17, 2024 · Service Bulletin/Repair Instructions
CBR: Frame Or Cab Lean - 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-399 202310 Oct 19, 2023 · Service Bulletin/Repair Instructions
CBR: Vehicle Overspeed Warning Comes Active At A Lower Speed Than Expected; Vehicle Overspeed Warning In Driver Information Display (DID) - Model Year 2018 And Newer With New Style Instrument Cluster - CBR-206 202310 Oct 12, 2023 · Service Bulletin/Repair Instructions
CBR: Vehicle Speed Factor (K-Factor) Programming - Speed Factor Value Incorrect When Calculated In Premium Tech Tool (PTT); Speedometer Reading Incorrectly Following A Change To Vehicle Speed Factor - US17+OBD16 And Newer Emissions, Common Model Year 2018. - CBR-570 202309 Sep 22, 2023 · Service Bulletin/Repair Instructions
CBR: Model Year 2017, 2018 - US17GHG Common Rail Fuel System Component Electrical Faults - M-258-014 202309 Sep 5, 2023 · Service Bulletin/Repair Instructions
TSB: Aftertreatment Diesel Exhaust Fluid (DEF) Tank, Level Sensor, Replacement - S7567 202309 Sep 4, 2023 · Service Bulletin/Repair Instructions
Service Campaign: Electronic Pressure Relief Valve (EPRV) Delete & Fuel Rail Pressure Sensor Update - 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-331-Ver6 May 22, 2023 · Service Bulletin/Repair Instructions
CBR: Model Year 2017 to Current - Fuel Filter Change ( Primary And Secondary ) For The EM - USA17 Emission Engines - 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-746 Jun 22, 2022 · Service Bulletin/Repair Instructions
Mack Chassis - Automated Manual Transmission Model F (AMT-F, mDrive) - Possible Infrequent Hiccup/Stumble During Steady Engine/Vehicle Speed; Diagnostic Trouble Code P1074-92, P1074-94, P1074-96 Logging, Appears As Inactive - Common Model Years 2018 - KC-733 Jun 6, 2022 · Service Bulletin/Repair Instructions
Back Office Mack Chassis - Secondary Gauge Set Up - Model Year 2018 and Newer. - KC-2107 Jun 3, 2022 · Service Bulletin/Repair Instructions
DEF Level (UQLS) Sensor Troubleshooting Guide - US17+OBD16 Emissions and Newer. - 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-2157 Jun 3, 2022 · Service Bulletin/Repair Instructions
Aftertreatment Hydrocarbon Injector (AHI) Troubleshooting Guide - US10+OBD13 And Newer Emissions. - 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-399 Jun 17, 2022 · Service Bulletin/Repair Instructions
Vehicle Overspeed Warning Comes Active At A Lower Speed Than Expected; Vehicle Overspeed Warning In Driver Information Display (DID) - Model Year 2018 And Newer With New Style Instrument Cluster. - 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-561 Jul 5, 2022 · Service Bulletin/Repair Instructions
11L, 13L, And 16L Engine Oil Analysis Specifications - US10 And Newer Emissions - 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-736 Jun 6, 2022 · Service Bulletin/Repair Instructions
(Back Office Only) - Engine Brake Vibration When In High Setting - 13L Engine With Variable Geometry Turbo ( VGT ) - US17 And Newer Emissions (Common Rail Fuel System). - 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.
Source: NHTSA manufacturer communications files.