2018 Mack Gu

Owner complaints

What owners report most

1. Electrical system1
2. Exterior lighting1
3. Visibility/wiper1

Latest complaints

• Apr 15, 2022TX
  Electrical 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

Service bulletins

Technical service bulletins and other communications the manufacturer sent dealers about this vehicle. Ask a dealer for the full document by its number.

• 10253807CBR: Turbo Compound (TC) Hot Side Noise, Diagnostic Information.
• 10253804CBR: 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.
• 10251333CBR -Telematics Gateway (TGW) Connect Ability Issues
• 10251331CBR - Active "Set Park Brake" Message On Drivers Information Display (DID).
• 10251329CBR - Automated Manual Transmission ( AMT ) Flywheel Pilot Bearing Wear On Input Shaft.
• 10251328CBR - Driveline Noise, Suspension Ride Height Too High, Suspension Will Not Exhaust - Chassis Built 2016w01 And Newer.
• 10249553CBR: TGW Will Not Connect After SIM Card Replacement
• 10249551CBR: Frame Or Cab Lean
• 10248108Emissions 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.
• 10248101CBR: 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.
• 10246086TSB: 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 new HD through shaft is an upgrade over the current standard shaft and can now be used as a replacement part instead of the standard shaft. The new HD shaft has a new design to increase strength, longevity and life over the standard shaft.
• 10244808CBR: 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
• 10244803CBR: 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.
• 10243454CBR: Model Year 2017, 2018 - US17GHG Common Rail Fuel System Component Electrical Faults
• 10243453TSB: Aftertreatment Diesel Exhaust Fluid (DEF) Tank, Level Sensor, Replacement
• 10243451Service Campaign: Electronic Pressure Relief Valve (EPRV) Delete & Fuel Rail Pressure Sensor Update
• 10241946TSB: Barksdale Leveling Valve, Leak Test
• 10241945TSB: Air Restriction Indicator
• 10240231CBR: Programming Failure - Chassis With Cummins Engine And An Allison Transmission
• 10240202CBR: Mack DEF Dosing Valve Diagnostic Trouble Codes (DTC) P202D00, P208E00, P103B00 - US10+OBD13 And Newer Emissions
• 10237374Service Literature Published and Released in May, 2023
• 10237354CBR: Model Year 2017 to Current - Fuel Filter Change ( Primary And Secondary ) For The EM - USA17 Emission Engines
• 10237351CBR: Automated Manual Transmission ( AMT ) -Transmission Electronic Control Unit ( TECU ) MID130 PSID 29 FMI 7 /P10AE81 Fault Codes Being Generated
• 10237348CBR: Automated Manual Transmission (AMT) Transmission Kickdown Mode
• 10237342CBR: Diagnostic Trouble Code (DTC) P215A-64, Fault Code SPN 84 FMI 19
• 10235490TSB: Vibration Diagnostics
• 10235489TSB: Stock Vehicle Storage and Maintenance
• 10232599Flywheel Housing Thread Repair
• 102286302007 document reformatted to be published as a TSB in Impact. Lateral cab movement bracket.
• 102226442008 Document reformatted to be published as a TSB in Impact. Air suspension ride height.
• 102226412008 Document reformatted to be published as a TSB in Impact. Two-Piece clutch brake.
• 102226402008 Document reformatted to be published as a TSB in Impact. Grille bar, replacment.
• 102226302008 Document reformatted to be published as a TSB in Impact. HVAC fine particulate filter.
• 102226212008 Document reformatted to be published as a TSB in Impact. Loose oil filter spud.
• 102226202008 Document reformatted to be published as a TSB in Impact. Cooling system connections.
• 102226152008 Document reformatted to be published as a TSB in Impact. Paint protection.
• 102226142008 Document reformated to be published as a TSB in Impact. Torque rod interference.
• 102226132008 Document reformated to be published as a TSB in Impact. Field repair for installing the grill.
• 102226102008 Document reformated to be published as a TSB in Impact. Revised battery ti battery cable
• 10222608TSB-Charge Air Cooler t-clamp install.

Every Mack Gu model year

Bars are owner complaints, dots mark years with recalls. Select a year to open its report.