2011 Mack GU712 Overview, Reviews, Ratings & Specs
The 2011 Mack GU712 is a robust heavy-duty vocational truck, part of Mack's Granite series known for its "Built Like a Mack Truck" durability. Typically configured as a dump truck, mixer, refuse hauler, or roll-off, it's a workhorse designed for demanding construction and municipal applications. Key "trims" are more about application-specific chassis variations. New pricing for similar vocational trucks started around $100,000-$150,000+, with used 2011 models currently ranging from $25,000 to $60,000+ depending on configuration and condition. Its reputation for a strong chassis, powerful MP series engines, and reliability in harsh conditions makes it a popular choice for operators prioritizing uptime and toughness.
The Good
The 2011 Mack GU712 offers exceptional reliability and performance, especially in rugged environments, thanks to its durable chassis and powerful Mack MP series engines. Its sturdy design provides practical buyers with confidence in uptime and longevity. Emotionally, owning a Mack signifies strength and a legacy of dependability, offering a sense of pride in a truck built to handle anything. While not the most fuel-efficient, its robust construction and resale value offer long-term financial appeal.
The Bad
Known weaknesses for the 2011 Mack GU712 often revolve around the early emissions systems, specifically the Diesel Particulate Filter (DPF) and Selective Catalytic Reduction (SCR) components, which can be prone to issues and require significant maintenance. Fuel economy, while expected for a vocational truck, can be lower than some rivals. Cab interior materials might show wear over time, and parts for older emissions systems can be costly.
2011 Mack GU712: Quick Overview
- Engine Options: The 2011 Mack GU712 primarily utilized Mack's proprietary MP series engines. Common options included the Mack MP7 and MP8 engines. These are inline 6-cylinder diesel engines renowned for their torque and durability in heavy-duty applications. Specific configurations could vary based on intended use.
- Horsepower: Horsepower ratings for the MP7 engines typically ranged from approximately 325 to 405 hp, while the larger MP8 engines offered higher outputs, generally between 415 and 505 hp. The specific horsepower would be configured based on the truck's application, such as a dump truck needing high torque for heavy loads or a mixer requiring consistent power.
- Fuel Economy: Fuel economy for heavy-duty vocational trucks like the GU712 is highly variable and not typically measured in EPA highway ratings like passenger cars. It depends heavily on application (idling, stop-and-go, highway), load, and terrain. Operators might see anywhere from 3 to 6 miles per gallon (MPG) under real-world vocational conditions. Fuel consumption is often a significant operational cost, and while Mack aims for efficiency, robust power takes precedence.
- 0-60 Times: 0-60 mph times are not a relevant performance metric for a heavy-duty vocational truck. These vehicles are designed for hauling immense loads and navigating challenging job sites, not rapid acceleration.
- Towing/Payload Capacity: Instead of "towing capacity" in the passenger vehicle sense, heavy-duty trucks are rated by Gross Vehicle Weight Rating (GVWR) and Gross Combination Weight Rating (GCWR). A 2011 Mack GU712 chassis could have a GVWR typically ranging from 60,000 lbs to 80,000 lbs or more, depending on axle configuration (e.g., tandem, tridem axles) and suspension. This dictates the maximum permissible weight of the truck itself plus its payload. Payload capacity would vary wildly based on the body installed (dump body, mixer drum, etc.) and chassis weight.
- Trim-Level Features: "Trims" in vocational trucks refer more to chassis configurations and cab options rather than luxury packages. Key features include:
- Cab Options: Typically offered with a day cab (short cab without a sleeper) for maximum maneuverability and payload.
- Axle Configurations: Available with various axle setups, including tandem rear axles, often with different ratios for specific vocational tasks.
- Suspension: Air ride or heavy-duty spring suspensions were available, providing options for ride comfort and load stability.
- Power Take-Off (PTO): Essential for operating auxiliary equipment like dump beds, concrete mixers, or refuse compactors.
- Heavy-Duty Components: Reinforced chassis, heavy-duty brakes (air brakes), and robust steering systems designed for demanding work.
- Interior: Functional and durable interior with basic amenities, often focused on ergonomics for the driver and easy-to-clean materials. Air conditioning, AM/FM radio, and basic gauges are standard. Optional features might include upgraded seating or improved audio systems.
2011 Mack GU712 Specifications
Vehicle Information
| Year | 2011 |
| Make | Mack |
| Model | GU712 |
| Trim | - |
| Style | - |
| Type | Truck |
| Category | Heavy Truck Vehicle) |
Manufacturing Details
| Made In | United States |
| Manufacturing City | MACUNGIE |
Dimensions
| Doors | - |
| Curb Weight | - |
| Gross Vehicle Weight Rating | 330001 pounds |
| Overall Height | - |
| Overall Length | - |
| Overall Width | - |
| Wheelbase Length | - |
| Standard Seating | - |
Engine & Performance
| Engine | 12.8L I6 |
| Engine Size | 12.8L |
| Engine Cylinders | 6 |
| Transmission | - |
| Transmission Type | - |
| Transmission Speeds | - |
| Drivetrain | - |
Additional Features
| Anti-Brake System | - |
| Steering Type | - |
Pricing
| Manufacturer Suggested Retail Price (MSRP) | - |
| Invoice Price | - |
| Delivery Charges | - |
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What Problems Does the 2011 Mack GU712 Have?
The 2011 Mack GU712, while praised for its "Built Like a Mack Truck" durability, isn't without its share of frequently reported problems, largely tied to the evolving emissions regulations of the era. A primary concern for this model year and similar contemporary heavy-duty trucks involves the Diesel Particulate Filter (DPF) and Selective Catalytic Reduction (SCR) systems. These early generation emissions controls, introduced to meet stricter EPA standards, were often complex and could be prone to various issues.
Common DPF-related problems include frequent regeneration cycles, clogged filters, sensor malfunctions (e.g., differential pressure sensors, temperature sensors), and issues with the dosing of Diesel Exhaust Fluid (DEF). Malfunctioning DPF systems can lead to reduced engine power, "derate" conditions, and ultimately, costly replacements. Similarly, the SCR system, which uses DEF to reduce NOx emissions, could experience problems with DEF crystallization, sensor failures, pump issues, or heater line failures in cold weather. These issues directly impact uptime and lead to significant repair expenses.
Beyond emissions, some owners have reported issues with electrical components, such as wiring harnesses becoming brittle or connections corroding over time, leading to intermittent problems with lights, gauges, or engine sensors. Air system leaks, common in heavy trucks, can also be a maintenance headache, affecting brakes and auxiliary functions. While the Mack MP engines are generally robust, like any high-stressed component, they can develop issues with injectors, turbochargers, or engine sensors as they accumulate high mileage. Regular and meticulous maintenance is crucial to mitigate these potential problems.
Regarding recalls, Mack, like all major manufacturers, has issued various recalls over the years that could potentially affect the 2011 GU712. These often relate to safety-critical components such as steering, braking systems, or specific engine components. For example, some recalls have addressed potential issues with steering gear assemblies or wiring harnesses that could affect vehicle control. It's always advisable for prospective buyers to check the VIN against the NHTSA recall database to ensure all applicable recalls have been addressed. Long-term reliability concerns are primarily centered on the longevity and cost-effectiveness of maintaining the DPF/SCR systems, which are integral to the truck's operation and compliance.
Common DPF-related problems include frequent regeneration cycles, clogged filters, sensor malfunctions (e.g., differential pressure sensors, temperature sensors), and issues with the dosing of Diesel Exhaust Fluid (DEF). Malfunctioning DPF systems can lead to reduced engine power, "derate" conditions, and ultimately, costly replacements. Similarly, the SCR system, which uses DEF to reduce NOx emissions, could experience problems with DEF crystallization, sensor failures, pump issues, or heater line failures in cold weather. These issues directly impact uptime and lead to significant repair expenses.
Beyond emissions, some owners have reported issues with electrical components, such as wiring harnesses becoming brittle or connections corroding over time, leading to intermittent problems with lights, gauges, or engine sensors. Air system leaks, common in heavy trucks, can also be a maintenance headache, affecting brakes and auxiliary functions. While the Mack MP engines are generally robust, like any high-stressed component, they can develop issues with injectors, turbochargers, or engine sensors as they accumulate high mileage. Regular and meticulous maintenance is crucial to mitigate these potential problems.
Regarding recalls, Mack, like all major manufacturers, has issued various recalls over the years that could potentially affect the 2011 GU712. These often relate to safety-critical components such as steering, braking systems, or specific engine components. For example, some recalls have addressed potential issues with steering gear assemblies or wiring harnesses that could affect vehicle control. It's always advisable for prospective buyers to check the VIN against the NHTSA recall database to ensure all applicable recalls have been addressed. Long-term reliability concerns are primarily centered on the longevity and cost-effectiveness of maintaining the DPF/SCR systems, which are integral to the truck's operation and compliance.
How long will the 2011 Mack GU712 last?
A well-maintained 2011 Mack GU712, particularly in vocational service, can easily achieve 500,000 to 700,000 miles or more, and often serves 10-15+ years. Many operations overhaul engines around the 700,000 to 1,000,000-mile mark, extending the vehicle's life significantly. Owner data suggests that diligent preventative maintenance, including regular oil changes, filter replacements, and attention to the emissions system, is paramount for longevity. Long-term durability is a hallmark of Mack trucks, with robust chassis, axles, and drivetrains built to last. However, weaknesses over time often manifest in the emissions system (DPF/SCR components), which require expensive upkeep or replacement, and electrical system issues due to environmental exposure. Corrosion, especially in severe climates or applications like refuse, can also become a concern for the cab and chassis components, impacting structural integrity and resale value.
What Technology & Safety Features are Included?
The 2011 Mack GU712, being a heavy-duty vocational truck, prioritizes robust functionality and driver efficiency over consumer-grade entertainment or advanced driver-assistance systems found in passenger vehicles. Built-in technology focuses on operational support and diagnostics. The primary "tech" involves the engine's electronic control unit (ECU) for performance management, fuel injection, and emissions control. Mack's integrated electronics architecture, known as "Vehicle Management System" (VMS), supports onboard diagnostics and telematics for fleet management, allowing for remote monitoring of engine performance, fault codes, and location. This allows fleet managers to optimize routes, track idle time, and manage maintenance.
Entertainment features are basic: typically an AM/FM radio, often with an auxiliary input for external devices. Bluetooth connectivity or advanced infotainment screens were not standard on this model year for vocational trucks; the focus remained on durability and ease of use in a harsh working environment. The interior design prioritizes ergonomics for the driver, with easily accessible controls and clear gauges.
Driver-assistance features, in the modern sense of adaptive cruise control or lane-keeping assist, were not prevalent on heavy-duty trucks in 2011. Driver assistance was more mechanical and visual: excellent visibility from a command driving position, large mirrors, and powerful air brakes. Optional features might include power windows and locks, air-ride seats for improved comfort, and perhaps upgraded lighting packages for enhanced visibility on job sites.
Safety features are foundational for commercial vehicles. The GU712 comes standard with a robust air brake system, anti-lock brakes (ABS), and often traction control. Stability control systems (Electronic Stability Control – ESC) were becoming more common and might have been an option or standard on some configurations. The cab structure itself is designed for strength and occupant protection in the event of an accident. However, it's crucial to note that crash-test ratings, similar to those conducted by organizations like the NHTSA or IIHS for passenger cars, are generally not available for heavy-duty commercial trucks. Their safety is assessed through compliance with federal motor vehicle safety standards (FMVSS) regarding braking, lighting, and structural integrity, rather than consumer-style crash tests. The emphasis is on preventing accidents through robust systems and driver training, and mitigating injury through structural design.
Entertainment features are basic: typically an AM/FM radio, often with an auxiliary input for external devices. Bluetooth connectivity or advanced infotainment screens were not standard on this model year for vocational trucks; the focus remained on durability and ease of use in a harsh working environment. The interior design prioritizes ergonomics for the driver, with easily accessible controls and clear gauges.
Driver-assistance features, in the modern sense of adaptive cruise control or lane-keeping assist, were not prevalent on heavy-duty trucks in 2011. Driver assistance was more mechanical and visual: excellent visibility from a command driving position, large mirrors, and powerful air brakes. Optional features might include power windows and locks, air-ride seats for improved comfort, and perhaps upgraded lighting packages for enhanced visibility on job sites.
Safety features are foundational for commercial vehicles. The GU712 comes standard with a robust air brake system, anti-lock brakes (ABS), and often traction control. Stability control systems (Electronic Stability Control – ESC) were becoming more common and might have been an option or standard on some configurations. The cab structure itself is designed for strength and occupant protection in the event of an accident. However, it's crucial to note that crash-test ratings, similar to those conducted by organizations like the NHTSA or IIHS for passenger cars, are generally not available for heavy-duty commercial trucks. Their safety is assessed through compliance with federal motor vehicle safety standards (FMVSS) regarding braking, lighting, and structural integrity, rather than consumer-style crash tests. The emphasis is on preventing accidents through robust systems and driver training, and mitigating injury through structural design.
What Colors Options are Available?
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In the meantime, feel free to explore the other sections for more content.
In the meantime, feel free to explore the other sections for more content.
2011 Mack GU712 Prices and Market Value
When new, a 2011 Mack GU712 chassis, depending on specification and body type (e.g., dump, mixer), would have commanded a price range generally from $100,000 to $170,000 or more. These are highly customized vocational trucks, so pricing varied significantly. Today, on the used market, a 2011 Mack GU712 can be found for prices typically ranging from $25,000 to $60,000+. Factors like mileage, condition, engine health, emissions system status, and the specific vocational body (e.g., a well-maintained dump body vs. a worn-out one) heavily influence the current used price. Depreciation for heavy-duty trucks is steep initially but then levels off. After a decade, the vehicle retains value based on its remaining useful life. Trucks with major engine overhauls or recently updated emissions components will command higher prices. Conversely, those with known DPF/SCR issues or significant rust will be on the lower end.
2011 Mack GU712 Cost of Ownership
The 2011 Mack GU712 is a costly vehicle to own, as are most heavy-duty vocational trucks. Commercial insurance premiums are substantial due to the high liability and potential for significant damage. Fuel costs are a major operational expense, with average MPG ranging from 3-6 depending on application. Maintenance, while critical for longevity, can be expensive, especially with specialized heavy-duty parts and labor rates. Repair costs, particularly for complex emissions systems (DPF/SCR), can be very high, easily running into thousands of dollars for a single component failure. Long-term ownership involves budgeting for engine overhauls, tire replacement, and ongoing emissions system upkeep. It is not an economical vehicle in the consumer sense, but its cost-effectiveness in its intended heavy-duty work depends on its uptime and productivity.
2011 Mack GU712 Fuel Efficiency
Fuel Type
Diesel
Fuel Capacity
-
City Mileage
-
Highway Mileage
-
2011 Mack GU712 Warranty
Basic
Original warranty
0 months / No data
Estimated remaining
Expired
Powertrain
Original warranty
0 months / No data
Estimated remaining
Expired
Rust
Original warranty
0 months / No data
Estimated remaining
Expired
2011 Mack GU712 Insurance
Insurance for a 2011 Mack GU712 is moderately priced, reflecting its status as a Truck with strong safety ratings and
reasonable repair costs.
reasonable repair costs.
How Does the 2011 Mack GU712 Compare to Other Truck?
The 2011 Mack GU712 competes directly with other prominent vocational trucks like the Peterbilt 365/367, Kenworth T800, Freightliner 114SD, and Volvo VHD. Each offers distinct advantages.
Performance: The GU712, with its Mack MP series engines, is known for strong low-end torque and robust pulling power, making it excellent for heavy-duty applications like dump and mixer work. Its integrated drivetrain is often cited for its synergy. Rivals like the Kenworth T800 and Peterbilt 367, frequently equipped with Cummins or Caterpillar engines (though Cat was phasing out on-road for 2011), also deliver formidable power, often with a wider array of engine choices for specific power curves. Freightliner's 114SD offers good performance with Detroit Diesel or Cummins options, often prioritizing lightweight components for higher payload.
Features: "Features" in this segment focus on vocational adaptability. The Mack GU712 offers a strong, customizable chassis, durable cab, and excellent visibility. Its proprietary mDrive automated manual transmission (though less common in 2011 for vocational models than later) was a notable tech offering. Rivals offer similar chassis customization, various cab options (from day cabs to extended day cabs), and a range of PTO options. Interiors are generally utilitarian across the board, with minor differences in material quality or ergonomics.
Reliability: This is where Mack traditionally shines, with its reputation for ruggedness. The GU712 maintains this "Built Like a Mack Truck" perception. However, like its rivals from 2011, it grapples with the reliability of early-generation DPF and SCR emissions systems. Kenworth and Peterbilt also have strong reputations for durability, often with parts commonality that aids serviceability. Freightliner, while robust, is sometimes perceived as less "heavy-duty" than a Mack or Pete for extreme vocational tasks, though still very capable.
Price: On the used market, pricing for the 2011 GU712 is competitive with similar Peterbilt 365/367, Kenworth T800, and Freightliner 114SD models. Mack's strong reputation can help maintain resale value, especially for well-spec'd and maintained units. Freightliners might sometimes be found at a slightly lower entry point, while a highly customized Peterbilt or Kenworth might command a premium.
Similar Alternatives:
Performance: The GU712, with its Mack MP series engines, is known for strong low-end torque and robust pulling power, making it excellent for heavy-duty applications like dump and mixer work. Its integrated drivetrain is often cited for its synergy. Rivals like the Kenworth T800 and Peterbilt 367, frequently equipped with Cummins or Caterpillar engines (though Cat was phasing out on-road for 2011), also deliver formidable power, often with a wider array of engine choices for specific power curves. Freightliner's 114SD offers good performance with Detroit Diesel or Cummins options, often prioritizing lightweight components for higher payload.
Features: "Features" in this segment focus on vocational adaptability. The Mack GU712 offers a strong, customizable chassis, durable cab, and excellent visibility. Its proprietary mDrive automated manual transmission (though less common in 2011 for vocational models than later) was a notable tech offering. Rivals offer similar chassis customization, various cab options (from day cabs to extended day cabs), and a range of PTO options. Interiors are generally utilitarian across the board, with minor differences in material quality or ergonomics.
Reliability: This is where Mack traditionally shines, with its reputation for ruggedness. The GU712 maintains this "Built Like a Mack Truck" perception. However, like its rivals from 2011, it grapples with the reliability of early-generation DPF and SCR emissions systems. Kenworth and Peterbilt also have strong reputations for durability, often with parts commonality that aids serviceability. Freightliner, while robust, is sometimes perceived as less "heavy-duty" than a Mack or Pete for extreme vocational tasks, though still very capable.
Price: On the used market, pricing for the 2011 GU712 is competitive with similar Peterbilt 365/367, Kenworth T800, and Freightliner 114SD models. Mack's strong reputation can help maintain resale value, especially for well-spec'd and maintained units. Freightliners might sometimes be found at a slightly lower entry point, while a highly customized Peterbilt or Kenworth might command a premium.
Similar Alternatives:
- Kenworth T800: A very strong alternative, known for its diverse configurations, driver comfort, and engine options (often Cummins). Excellent for various vocational applications.
- Peterbilt 365/367: Often considered premium vocational trucks, offering similar robust construction and customization with a "driver's truck" appeal.
- Freightliner 114SD: A versatile and often more common alternative, offering good value and widespread service availability, especially for refuse or general construction.
- Volvo VHD: Shares some commonality with Mack (both under Volvo Group) and offers a strong, modern platform, particularly appealing for those valuing a more integrated, European-influenced design and engine management.
Final Verdict: Is the 2011 Mack GU712 a Good Truck?
The 2011 Mack GU712 is ideal for construction companies, municipalities, and independent owner-operators needing a supremely durable and powerful vocational truck for demanding applications like dump, mixer, or refuse collection. It excels where ruggedness and consistent performance in harsh environments are paramount. It's a truck for those who appreciate Mack's "bulldog" heritage and robust engineering.
Is it worth buying? Yes, but with significant caveats. It's a strong contender as a used vehicle, offering substantial value compared to new vocational trucks. However, potential buyers must proceed cautiously. Look for units that have a meticulously documented maintenance history, especially regarding the DPF and SCR emissions systems. A pre-purchase inspection by a Mack-certified mechanic is non-negotiable. It's worth buying if you understand the higher operating costs associated with heavy-duty trucks, particularly for fuel and emissions system upkeep, and if you can secure a unit where major emissions components have already been serviced or replaced. Avoid units with known, unaddressed DPF/SCR issues or significant corrosion, as these will quickly negate any initial savings. Specific trims (chassis configurations) should align precisely with your intended application for maximum productivity and efficiency.
Is it worth buying? Yes, but with significant caveats. It's a strong contender as a used vehicle, offering substantial value compared to new vocational trucks. However, potential buyers must proceed cautiously. Look for units that have a meticulously documented maintenance history, especially regarding the DPF and SCR emissions systems. A pre-purchase inspection by a Mack-certified mechanic is non-negotiable. It's worth buying if you understand the higher operating costs associated with heavy-duty trucks, particularly for fuel and emissions system upkeep, and if you can secure a unit where major emissions components have already been serviced or replaced. Avoid units with known, unaddressed DPF/SCR issues or significant corrosion, as these will quickly negate any initial savings. Specific trims (chassis configurations) should align precisely with your intended application for maximum productivity and efficiency.
Drew B
Drew is a seasoned automotive expert and contributor to VinCheck.info. With nearly 15 years of experience as a former Porsche technician, he brings a wealth of hands-on knowledge to his writing. Born in North Carolina, a region renowned for its deep-rooted NASCAR culture, Drew developed a passion for cars early in life, often building and working on vehicles from a young age. At VINCheck, Drew leverages his extensive technical background to provide in-depth analyses of various vehicles. His articles often focus on engine performance, reliability, and maintenance insights, offering readers practical information grounded in real-world experience. Some of his notable contributions include reviews on the Mazda CX-5's longevity and detailed examinations of engine options for models like the 2011 Toyota Camry and Tacoma