Total Complaints
1 filings
MACK GU · model year
2009 MACK GU
1 NHTSA complaints, and 7 recall campaigns listed for this cohort. A VIN lookup is required to determine whether a specific vehicle has an unrepaired recall.
NHTSA overall rating
Not crash-tested
New Car Assessment Program
The 2009MACKGU carries 1 consumer safety complaint in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 0 crashes, 0 fires, 0 injuries, and 0 fatalities. No NCAP 5-star crash-test rating is available for this model year in the federal database.
The most frequently selected component label in reports for the 2009 GU is engine with 1 filings. Complaint categories reflect owner reports and intake categorization; they do not establish a defect pattern or cause. This cohort has 7 NHTSA recall campaigns listed below. Enter a VIN in NHTSA's official recall lookup to determine whether a specific vehicle has an unrepaired recall.
NHTSA currently has 5 investigation files overlapping the 2009 GU. Owners comparing this cohort against neighboring years should read the complaint-by-year trend as report volume, not a causal diagnosis. Use the related-complaint feed and the official recall lookup when researching a specific vehicle.
1
Complaints
0
Crashes
0
Fires
0
Injuries
0
Deaths
Crashes Reported
0 reports
Source
NHTSA ODI
Federal complaints database
Complaints vs. fleet median (215)
At or below the fleet median complaint volume.
Complaints by Component
| Component | Count |
|---|---|
| ENGINE | 1 |
Recalls (7)
08V33100023/07/2008
EXTERIOR LIGHTING:HEADLIGHTS
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 SEAT
14V07800021/02/2014
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, 2
11V29200020/05/2011
ELECTRICAL SYSTEM:12V/24V/48V BATTERY:CABLES
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 CHAF
12V51900018/10/2012
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.
14V20800018/04/2014
EXTERIOR LIGHTING:TURN SIGNAL:FLASHER UNIT
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.
08V17700017/04/2008
PARKING BRAKE:CONVENTIONAL:AIR
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
10V40400007/09/2010
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
Recent Complaints
20180918ENGINE
VEHICLE HAVING ELECTRICAL ISSUES, LIGHTS AND RADIO SHUTTING OFF AND EXHAUST ENGINE BREAK WORKING INTERMITTENTLY. HOOKED UP AND MOSTLY DATA LINK CODES. IC CLUSTER LIGHTS FLASH ON AND OFF WHILE HOOKED UP. FOUND ENGINE ECM FULL OF OIL ON BOTH A AND B CONNECTORS. OIL LEVEL SENSOR IS LEAKING WIC KING OIL UP TO ECM. WILL NEED ECM,HARNESS,OIL LEVEL, OIL PRESSURE SENSORS AND EGR VENTURI FRONT CAB MOUNTS ARE WORE CAUSING AIR CLEANER HEAT SHEILD TO RUB THOUGHT VALVE COVER. NEED TO REPAIR ENGINE BEFORE ANYMORE T/S.
Mileage: 58,500
Compare 2009MACKGU to Similar Vehicles
NHTSA Investigations
PE20005Preliminary EvaluationClosed
mDrive Transmission Failure to Disengage
PE20003Preliminary EvaluationClosed
Vehicle Roll Away
PE10042Preliminary EvaluationClosed
Failing 5th wheel attachment bolts
PE08069Preliminary EvaluationClosed
AIR COMPRESSOR DISCHARGE LINE
PE02094Preliminary EvaluationClosed
INTEGRAL HUB AND BEARING ASSEMBLY
Frequently Asked Questions
How many complaints does the 2009 MACK GU have?▼
The 2009 MACK GU has 1 NHTSA complaints, 0 crashes, 0 fires, 0 injuries, and 0 deaths reported.
Are there any recalls for the 2009 MACK GU?▼
Yes, the 2009 MACK GU has 7 recall(s). The most common affected component is EXTERIOR LIGHTING:HEADLIGHTS. Recalls are issued by NHTSA and manufacturers must provide a free remedy.
What are the most common problems with the 2009 MACK GU?▼
The most-complained component for the 2009 MACK GU is ENGINE with 1 complaints. Other frequently reported areas include various components.
Is the 2009 MACK GU safe to buy?▼
Review the complaint history, crash and fire reports, safety ratings, and recall status on this page to make an informed decision. No NHTSA crash test rating is available for this model year. Compare with other model years using the links above.
Where does this data come from?▼
All complaint, recall, and safety rating data is sourced from the National Highway Traffic Safety Administration (NHTSA). Complaints are filed by vehicle owners through NHTSA's Office of Defects Investigation.
Vehicle Safety Guides
Data vintage: August 2026. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.
Every figure on PlainCars is rendered directly from NHTSA complaint and safety data, no number is typed in by an editor. This year-specific record is rendered from NHTSA ODI, recall, and NCAP rows for the 2009 MACK GU; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.
Read our methodology - how this data is sourced, computed, and verified.