Mack Gu Recalls & Complaints by Model Year
NHTSA lists 14 safety recalls and 6 owner complaints across 9 model years of the Mack Gu (2007–2018). The most-complained-about year is 2009.
Pick your Mack Gu model year
| Model year | Recalls | Complaints |
|---|---|---|
| 2018 Mack Gu | 0 | 1 |
| 2015 Mack Gu | 0 | 1 |
| 2014 Mack Gu | 0 | 1 |
| 2013 Mack Gu | 0 | 1 |
| 2011 Mack Gu | 5 | 0 |
| 2010 Mack Gu | 4 | 1 |
| 2009 Mack Gu | 7 | 1 |
| 2008 Mack Gu | 9 | 0 |
| 2007 Mack Gu | 2 | 0 |
What Mack Gu owners complain about
Across all model years, owners have filed 6 complaints with NHTSA. The 2009 model year has the most, with 1.
All Mack Gu recalls (14)
Every NHTSA safety campaign that lists a Mack Gu, most recent first, with the model years each one covers.
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Flasher unit (exterior lighting)
Mack Trucks Inc. (Mack) is recalling certain model year 2010-2014 CHU, CXU, and MRU, 2007 CT and CV, 2008-2014 GU, and 2011-2014 LEU, and TD trucks manufactured February 28, 2006, through November 8, 2013, and equipped Hamsar Electronic Flasher. The hazard warning lights may fail.
Remedy: Mack will notify owners, and dealers will replace the electronic flasher unit, free of charge. The recall will begin by mid-June 2014. Interim letters went out to owners on June 23, 2014. The recall began on July 25,…
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Electrical system
Mack Trucks, Inc. (Mack) notified the agency on February 20, 2014, that they are recalling certain model year 2010-2012 CHU, CXU, GU and TD vehicles manufactured from June 16, 2009, through July 8, 2011. While continuing to research the scope of the issue, Mack expanded the recall on November 18, 2014 to include certain model year…
Remedy: Mack has notified owners, and dealers will inspect the EPDM. If contamination has occurred, dealers will replace the EPDM and address the leak, free of charge. Owners of model year 2010-2012 CHU, CXU, GU and TD…
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Electrical system
Mack Trucks is recalling certain model year 2008-2009 GU, LEU, and MRU trucks, manufactured from December 12, 2007, through May 8, 2008 and equipped with a certain focal mounted retarder control box. The control box may lose its electrical ground.
Remedy: All affected vehicles were sold to one customer that has already been notified. An official owner notification letter will be mailed to the one customer in early November 2012. Mack will replace the suspect control box…
Model years: 2009
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Cables (electrical system)
Mack trucks is recalling certain model year 2008-2011 gu heavy trucks manufactured from september 12, 2007, through april 8, 2011, with a four battery cable design. As a result of the routing and clipping used, the battery cables may come into contact with frame hardware, which, as a result of chafing, may cause the insulation to become…
Remedy: Dealers will re-route the battery cables and replace the cables if chafing has occurred. This service will be performed free of charge. The safety recall began on july 11, 2011. Owners may contact mack trucks at…
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Automatic (service brakes)
Mack trucks is recalling certain model year 2011-2012 chu, cxu, gu, leu and mru trucks manufactured from october 15, 2010, through january 31, 2011, and equipped with gunite automatic slack adjusters. Due to an incomplete "knitting" of the iron at the time of casting, inadequate structural integrity of the slack adjuster housing can…
Remedy: Mack trucks will notify owners and dealers will replace the subject slack adjusters free of charge. The safety recall began on august 24, 2011. Owners may contact mack trucks at 1-800-528-6586.
Model years: 2011
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Service brakes, air
Mack is recalling certain model year 2008 through 2011 gu and mru model vehicles manufactured with a front tow glad hand option. The actuation and release timing of the vehicles exceeds the limit which fails to conform to the requirements of federal motor vehicle safety standard no. 121, "air brake systems."
Remedy: Mack will notify owners and repair the vehicle free of charge. The safety recall began on february 1, 2011. Owners may contact mack at 1-877-800-4945.
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Headlights (exterior lighting)
Mack is recalling certain my 2009 trucks equipped with hella headlamps for failing to comply with the photometric output requirements of federal motor vehicle safety standard no. 108, 'lamps, reflective devices, and associated equipment." the headlamp's bulb shield may not have been completely seated into the headlamp's reflector.
Remedy: Dealers will inspect the headlamps for the suspect date codes and replace as required free of charge. The recall began on september 8, 2008. Owners may contact mack trucks at 1-800-528-6586.
Model years: 2009
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Air (parking brake)
Mack is recalling 66 my 2009 gu trucks equipped with bendix mv-3 dash control valves. The molded valve body has an incorrect core pin in the injection mold causing the valve body to be oversized in the double check valve area. This condition can allow the rubber double check valve to become lodged in the body opening under certain…
Remedy: Dealers will inspect the mv-3 dash valve for the production date code. Valves in the affected production lots will be replaced free of charge. The recall began on may 9, 2008. Owners may contact mack trucks at…
Model years: 2009
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Exterior lighting
On certain trucks, the daytime running lights (drl) module may contain a suspect metal-oxide-semiconductor field effect transistor (mosfet) that could overheat.
Remedy: Dealers will replace the suspect drl module free of charge. The recall began on october 31, 2007. Owners may contact mack trucks at 1-800-528-6586.
Model years: 2008
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Parking brake
On certain trucks equipped with bendix sr-7 spring brake modulating valves, the internal rubber check valve may leak causing a delay in the application of the spring brakes to park the vehicle after the operator pulls the dash valve button.
Remedy: Mack is working with bendix to repair these vehicles (please see 07e037). Bendix will install a check valve repair kit for the affected sr-7 spring brake modulating valve free of charge. The recall began on january 10,…
Model years: 2008
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Check valve (service brakes)
On certain trucks equipped with parker single check valves (scv) provided by bendix. The defect exists in the parker scv that connects with the supply port of the sr-7 spring brake modulating valve. After prolonged use of the parker scv, the valve body retainer may become excessively worn and eventually break apart. Pieces of the parker…
Remedy: Mack is working with bendix to replace the parker single check valve. The recall began on january 9, 2008. Owners may contact bendix at 1-440-329-9000 or mack at 1-800-528-6586.
Model years: 2008
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Steering
On certain trucks, the nut used to retain the steering shaft may or may not be a lock nut that has the locking feature. A lock nut is required to provide additional resistance to ensure that the nut does not come loose.
Remedy: Dealers will replace the steering shaft pinch bolts and locknuts free of charge. The recall began on august 24, 2007. Owners may contact mack trucks at 1-800-528-6586.
Model years: 2008
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Pedals and linkages (service brakes)
On certain trucks, the cotter pin that retains the brake pedal clevis pin may not have been installed. The clevis pin connects the brake pedal to the brake foot valve.
Remedy: Dealers will inspect to see if the cotter pin is missing. If the pin is missing, the cotter pin will be installed. Owners are being advised not the drive the vehicle until the pin has been installed. The recall began…
Model years: 2008
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Suspension
On certain trucks equipped with a 46k pound chalmers rear suspension, the adjustable torque rods used on the suspension may be brittle.
Remedy: Dealers will inspect and repair the rods as required free of charge. The recall began on march 14, 2007. Owners may contact mack trucks at 1-800-528-6586.
Model years: 2007
Other Mack models
- Mack28 complaints
- Anthem (an)12 complaints
- Granite (gr)9 complaints
- CXU6127 complaints
- Ch6 complaints
- CH6005 complaints
- Cxu5 complaints
- Rd5 complaints
Source: NHTSA recall and complaint databases and EPA fuel economy data, October 2026. Complaint counts are owner reports to NHTSA, not verified defects. Recall counts are safety campaigns that list this model year; whether a particular car was already repaired depends on its VIN. How this data is compiled.