
Overview of the Yukon Denali SUV
The Yukon Denali, a flagship SUV from General Motors, embodies luxury and capability. Its robust design and advanced features position it as a premium choice for those seeking a powerful and sophisticated vehicle. This overview delves into the Yukon Denali’s history, features, target audience, and market position, providing a comprehensive understanding of this iconic vehicle.
The Yukon Denali has evolved from a basic utility vehicle to a sophisticated, luxury-oriented SUV, reflecting the changing demands of the market and technological advancements. Its refined interior and powerful engine are matched by advanced safety and infotainment features, catering to a discerning clientele.
Features and Specifications
The Yukon Denali’s features blend luxury and functionality. It boasts a spacious interior with high-quality materials, advanced infotainment systems, and a potent engine capable of handling various terrains. Standard features often include premium leather seating, advanced driver-assistance systems, and a suite of comfort and convenience technologies. Specific specifications, including engine options, towing capacity, and fuel efficiency, vary depending on the model year and trim level. Crucially, the Denali model distinguishes itself from other Yukon models with unique exterior design elements, interior appointments, and technological upgrades.
History and Evolution
The Yukon Denali’s history traces back to the initial introduction of the Yukon model. Over time, the Denali trim level evolved to become a separate entity, representing the pinnacle of luxury and capability within the Yukon lineup. Early models prioritized ruggedness and practicality. Subsequent generations saw an increasing emphasis on refined aesthetics, advanced technology, and luxurious interior appointments. Each iteration builds upon the previous one, reflecting continuous refinement and innovation.
Common Uses and Applications
The Yukon Denali’s versatile nature makes it suitable for diverse applications. Families appreciate its spacious interior and robust design for transporting passengers and cargo. Business professionals find its upscale features and advanced technology beneficial for both personal and business travel. The vehicle’s capability is also suitable for recreational activities, from weekend getaways to off-road adventures.
Target Audience and Market Positioning
The target audience for the Yukon Denali includes affluent consumers seeking a luxurious and capable SUV. Its market positioning emphasizes premium quality, advanced technology, and a focus on driving experience and comfort. The vehicle aims to attract individuals who value a blend of luxury and utility. The Denali’s design and features aim to differentiate it from competitors, highlighting its prestige and exclusive nature.
Comparison to Competitors
Feature | Yukon Denali | Competitor 1 (e.g., Ford Expedition Platinum) | Competitor 2 (e.g., Chevrolet Tahoe RST) |
---|---|---|---|
Engine | Powerful V8; potential hybrid options | Powerful V8; potential hybrid options | Powerful V8; potential hybrid options |
Interior | Premium leather, advanced technology | Premium materials, advanced technology | Premium materials, advanced technology |
Safety Features | Advanced driver-assistance systems | Advanced driver-assistance systems | Advanced driver-assistance systems |
Off-Road Capability | Standard suspension upgrades, optional packages | Standard suspension upgrades, optional packages | Standard suspension upgrades, optional packages |
Price | Typically higher than competitors | Typically higher than competitors | Typically higher than competitors |
This table highlights key features and specifications, illustrating how the Yukon Denali distinguishes itself within the competitive SUV market. The price point often reflects the added luxury and advanced technology compared to its competitors.
Performance and Capabilities
The Yukon Denali’s performance is a key factor for many buyers, reflecting a blend of power, capability, and refinement. Its ability to handle various driving conditions, from highway cruising to off-road adventures, contributes significantly to its appeal. This section delves into the engine options, powertrain configurations, handling, acceleration, braking, off-road capabilities, and fuel efficiency of the Yukon Denali.
Engine Options and Powertrain Configurations
The Yukon Denali offers a potent engine lineup. Different trim levels are equipped with various engine configurations to cater to diverse needs and preferences. The specific engine type and its corresponding output will influence the overall performance of the vehicle.
Handling, Acceleration, and Braking Performance
The Yukon Denali’s handling is generally responsive and composed for a large SUV. Its acceleration is sufficient for everyday driving and highway maneuvers. Braking performance is usually reliable and offers a controlled stopping experience. The suspension system is tuned for a balance of comfort and handling.
Off-Road Capabilities
The Yukon Denali’s off-road capabilities are enhanced by features like available all-wheel drive, ground clearance, and suspension tuning. While not designed for extreme off-roading, it performs adequately on unpaved roads and light trails. Comparing it to dedicated off-road SUVs, the Yukon Denali focuses on a balance between on-road performance and some off-road capability.
Fuel Efficiency
Fuel efficiency varies based on several factors, including driving conditions, terrain, and the specific engine. City driving, highway cruising, and off-road conditions all impact the vehicle’s fuel economy. The Yukon Denali’s fuel economy is generally competitive within the large SUV segment.
Trim Level Performance Characteristics
Trim Level | Engine | Horsepower | Torque (lb-ft) | Fuel Economy (mpg) |
---|---|---|---|---|
Base Yukon Denali | 3.0L Turbocharged V6 | 335 hp | 420 lb-ft | 18-22 (city/highway) |
High-End Yukon Denali | 6.2L V8 | 420 hp | 460 lb-ft | 16-20 (city/highway) |
Yukon Denali Platinum | 3.0L Turbocharged V6 | 335 hp | 420 lb-ft | 18-22 (city/highway) |
Note: Fuel economy figures are estimates and may vary depending on driving conditions and individual vehicle factors.
Interior and Comfort
The Yukon Denali’s interior is a blend of luxury and functionality, designed to provide a comfortable and engaging driving experience for both driver and passengers. High-quality materials and thoughtful design elements contribute to a sophisticated and upscale ambiance. The cabin offers ample space for passengers and cargo, while advanced technology integrates seamlessly into the overall design.
Interior Design and Materials
The Yukon Denali’s interior features a sophisticated design, with premium materials like supple leather upholstery, polished wood accents, and brushed metal trim. These details contribute to a refined and luxurious atmosphere. High-quality plastics and soft-touch materials are also used throughout the cabin, providing a pleasant tactile experience. The use of contrasting colors and textures enhances the overall aesthetic appeal.
Seating Capacity and Comfort
The Yukon Denali offers spacious seating for up to eight passengers, with comfortable seating arrangements. The front seats feature supportive cushioning and ample adjustment options, promoting a comfortable driving experience. Rear passengers also benefit from ample legroom and headroom, accommodating adults and children alike. The spacious cargo area provides substantial room for luggage or cargo, catering to various needs.
Infotainment System
The Yukon Denali’s infotainment system is a sophisticated touchscreen interface that integrates seamlessly with various vehicle functions. The system provides a wide array of features, including navigation, audio controls, smartphone integration, and entertainment options. It is user-friendly, allowing drivers and passengers to easily access and control these features.
Safety Features and Driver-Assistance Technologies
The Yukon Denali prioritizes safety with a comprehensive suite of advanced safety features and driver-assistance technologies. These features help to prevent accidents and enhance the overall driving experience. Features include automatic emergency braking, lane departure warning, adaptive cruise control, and blind-spot monitoring. These safety technologies contribute to a safer and more secure driving experience.
Interior Configurations
Configuration | Seating Capacity | Cargo Space | Key Features |
---|---|---|---|
Standard | 8 Passengers | Adequate | Standard leather upholstery, standard infotainment system, and basic safety features. |
Luxury | 8 Passengers | Adequate | Premium leather upholstery, upgraded infotainment system, advanced safety features, and optional driver-assistance technologies. |
Premium | 8 Passengers | Adequate | Top-tier leather upholstery, advanced infotainment system with premium audio, extensive safety features, and advanced driver-assistance technologies. |
The table above Artikels the different interior configurations available, highlighting the key differences in seating capacity, cargo space, and key features for each. Customization options allow drivers to personalize their interior configuration to meet their specific needs and preferences.
Technology and Features

The 2024 Yukon Denali boasts a suite of advanced technologies designed to enhance the driving experience and provide a premium in-cabin environment. These features cater to a wide range of needs, from infotainment and connectivity to safety and driver assistance. This section details the available technology packages, emphasizing their benefits and how they contribute to the overall driving experience.
Available Technology Features
The Yukon Denali’s technology features are designed to integrate seamlessly with the driver’s lifestyle and preferences. From intuitive infotainment systems to advanced safety features, the vehicle is equipped to handle various driving scenarios and needs. The array of features caters to a range of driver preferences and driving situations.
- Infotainment System: The infotainment system provides access to navigation, entertainment, and vehicle controls through a large touchscreen display. Voice commands enhance user-friendliness, allowing drivers to maintain focus on the road. The system integrates seamlessly with various mobile applications for enhanced convenience.
- Connectivity Options: The Yukon Denali offers various connectivity options, including Wi-Fi hotspot functionality, allowing passengers to connect multiple devices simultaneously. The vehicle seamlessly connects to various mobile devices, providing seamless data transfer and integration. Bluetooth and USB ports enable easy audio streaming and data transfer, promoting connectivity with the driver’s personal devices.
- Advanced Driver-Assistance Systems (ADAS): Advanced driver-assistance systems include features such as adaptive cruise control, lane departure warning, and automatic emergency braking. These systems aim to enhance safety and driver awareness by proactively mitigating potential risks. These features enhance driver safety and comfort by anticipating and reacting to potential hazards on the road.
Smartphone Integration
The Yukon Denali seamlessly integrates with smartphones, allowing drivers to use familiar apps and services directly through the vehicle’s infotainment system. This intuitive integration minimizes distractions and promotes a safer driving experience.
- Apple CarPlay and Android Auto: The vehicle supports both Apple CarPlay and Android Auto, enabling drivers to mirror their smartphone screens and access various apps and features through the vehicle’s display. This seamless integration enables easy access to navigation, music, and messaging applications without compromising driver focus.
- Wireless Connectivity: Wireless smartphone connectivity further enhances the user experience, allowing for a more intuitive and efficient integration between the smartphone and the vehicle’s technology. This eliminates the need for physical connections, promoting a streamlined and efficient connection.
Advanced Driver-Assistance Systems
Advanced Driver-Assistance Systems (ADAS) play a crucial role in enhancing safety and driver comfort. These systems use sensors and algorithms to monitor the surrounding environment and provide alerts or automated interventions to mitigate potential hazards.
- Adaptive Cruise Control: Maintains a safe following distance from the vehicle ahead and automatically adjusts speed based on traffic conditions. This feature helps maintain a consistent speed while minimizing the risk of collisions.
- Lane Departure Warning: Alerts the driver if the vehicle starts to drift out of its lane, providing an early warning to maintain safe lane positioning. This proactive system enhances driver awareness and helps maintain a safe driving position.
- Automatic Emergency Braking: Actively detects potential collisions and automatically applies the brakes to help prevent or mitigate the severity of an accident. This system is crucial for preventing collisions and minimizing potential harm in hazardous situations.
Technology Packages
The Yukon Denali offers various technology packages tailored to different needs and preferences. The packages bundle various technologies together, providing value-added features for specific requirements.
Technology Package | Key Features |
---|---|
Premium Technology Package | Advanced infotainment system, enhanced connectivity features, and a selection of driver-assistance systems. |
Luxury Technology Package | Includes all features from the Premium Technology Package, plus premium audio system and enhanced comfort features. |
Ultimate Technology Package | Comprises all features from the Luxury Technology Package, plus advanced safety features and sophisticated driver-assistance systems. |
Exterior Design and Styling

The exterior of the Yukon Denali exudes a blend of ruggedness and sophistication, reflecting its powerful performance capabilities while maintaining a refined aesthetic. Its sculpted lines and premium materials create a striking presence, making a statement on the road. The design prioritizes both visual appeal and practical considerations for a comfortable and capable SUV experience.
Exterior Styling and Design Elements
The Yukon Denali’s exterior design incorporates sculpted body panels, aggressive front fascia, and a strong, prominent grille. These elements contribute to the vehicle’s imposing presence and assertive road presence. The design elements are carefully considered to create a sense of power and sophistication.
Color Options
The Yukon Denali offers a diverse palette of exterior color options, catering to various tastes and preferences. These choices range from classic neutral tones to more vibrant and eye-catching hues. Each color option is meticulously selected to enhance the overall aesthetic appeal and complement the vehicle’s design.
Wheel Choices
The Yukon Denali provides a selection of high-quality wheel designs and sizes, enhancing the vehicle’s visual appeal and reflecting the premium nature of the model. These wheel choices are carefully considered to complement the exterior design and enhance the overall driving experience.
Vehicle Dimensions and Proportions
The Yukon Denali’s dimensions and proportions are carefully balanced to maximize interior space and provide a comfortable and spacious ride. The vehicle’s length, width, and height are tailored to create an imposing yet practical presence on the road. The dimensions contribute to its commanding presence and practicality.
Design Philosophy
The design philosophy behind the Yukon Denali’s aesthetics is rooted in a balance between rugged capability and refined sophistication. The design team aimed to create a vehicle that commands attention while maintaining a sense of understated luxury. This balance is reflected in the vehicle’s exterior features, ensuring a harmonious blend of power and refinement.
Exterior Dimensions Comparison (Example)
Feature | Yukon Denali | Competitor A | Competitor B |
---|---|---|---|
Length (inches) | 208.7 | 205.5 | 200.0 |
Width (inches) | 79.0 | 77.8 | 76.5 |
Height (inches) | 73.5 | 72.2 | 71.0 |
Wheelbase (inches) | 118.0 | 115.5 | 113.0 |
Note: Competitor A and Competitor B are hypothetical examples. Actual dimensions will vary based on the specific model year and trim level of the competing vehicles.
Safety and Reliability
The Chevrolet Yukon Denali prioritizes occupant safety and long-term reliability. This section details the safety ratings, crash test performance, maintenance history, safety features, and warranty offered by the vehicle. Understanding these aspects allows potential buyers to assess the Yukon Denali’s overall safety profile and value proposition.
Safety Ratings and Crash Test Results
The Yukon Denali consistently earns high safety ratings from independent organizations. These ratings are based on rigorous crash testing, assessing the vehicle’s ability to protect occupants in various accident scenarios. Detailed information on specific crash test results and corresponding safety ratings is readily available from organizations like the National Highway Traffic Safety Administration (NHTSA) and the Insurance Institute for Highway Safety (IIHS). These reports provide a comprehensive understanding of the vehicle’s performance in frontal, side, and rollover crash tests, allowing potential buyers to make informed decisions.
Reliability and Maintenance History
The Yukon Denali’s reliability is evaluated through long-term owner feedback and industry reports. Data from automotive consumer publications, along with owner reviews, often offer insights into typical maintenance costs, common issues, and overall durability. This information helps potential buyers anticipate potential maintenance needs and budget accordingly.
Safety Features and Driver-Assistance Technologies
The Yukon Denali boasts a suite of advanced safety features and driver-assistance technologies. These features aim to enhance driver awareness and responsiveness in various driving situations, thereby reducing the risk of accidents. Features like automatic emergency braking, lane departure warning, and adaptive cruise control are standard or available as options, depending on the specific trim level. These features work in concert to create a more secure and comfortable driving experience.
Warranty and Service Programs
Chevrolet offers a comprehensive warranty and service program for the Yukon Denali. This program Artikels the terms and conditions for coverage, including the duration of the warranty, parts covered, and procedures for service claims. Information about these programs is readily available on the Chevrolet website. The warranty and service plan provide peace of mind for the vehicle’s owner, ensuring that the car is adequately covered in case of defects or malfunctions.
Comparison of Safety Features
Safety Feature | Yukon Denali | Competitor 1 (e.g., Ford Expedition) | Competitor 2 (e.g., Toyota Sequoia) |
---|---|---|---|
Automatic Emergency Braking | Standard | Standard | Standard |
Lane Departure Warning | Standard | Standard | Standard |
Adaptive Cruise Control | Standard/Optional | Standard/Optional | Standard/Optional |
Blind Spot Monitoring | Standard/Optional | Standard/Optional | Standard/Optional |
Rear Cross-Traffic Alert | Standard/Optional | Standard/Optional | Standard/Optional |
Note: This table is a sample and may not reflect all features or their availability across all trims and years. Consult the manufacturer’s website for specific details and features for each model year.
Pricing and Value Proposition
The pricing structure of the GMC Yukon Denali plays a crucial role in determining its appeal to potential buyers. Understanding the price points and the value proposition offered by each trim level is essential for making an informed decision. This section explores the pricing strategy, highlights the value proposition relative to competitors, and details available financing options.
Pricing Structure Across Trims
The Yukon Denali’s pricing varies significantly across its different trim levels, reflecting the escalating features and luxury amenities. Higher trim levels naturally come with more advanced technologies and premium materials, justifying the increased cost. This tiered pricing strategy allows buyers to select a model that best suits their budget and desired features.
Value Proposition Compared to Competitors
The Yukon Denali’s value proposition is multifaceted. Beyond its luxury appointments and powerful engine options, the vehicle’s robust features and spacious interior provide a compelling combination of performance, comfort, and utility. This comprehensive package positions it competitively against luxury SUVs from other brands, offering a blend of performance, comfort, and technology. When compared to competitors like the Cadillac Escalade, Lincoln Navigator, or the Ford Expedition, the Yukon Denali provides a balanced package that stands out with its unique blend of features.
Special Financing and Lease Options
GMC often partners with financial institutions to offer attractive financing and lease options for the Yukon Denali. These programs aim to make the purchase or lease of the vehicle more accessible to potential buyers. Potential buyers should explore the specific options available through various financial institutions.
Pricing Table
The following table illustrates the estimated pricing for the different trims of the Yukon Denali, highlighting the price escalation associated with increased features. These figures are estimates and may vary based on location and specific features.
Trim | Estimated Price (USD) | Key Features |
---|---|---|
Yukon Denali Base | $75,000 | Standard safety features, powerful engine, spacious interior |
Yukon Denali Premium | $85,000 | Enhanced infotainment system, premium leather upholstery, advanced driver-assistance systems |
Yukon Denali Denali Ultimate | $95,000 | Luxury amenities, advanced safety technologies, advanced driver-assistance features, premium sound system |
Reviews and Consumer Feedback
The Yukon Denali, a flagship SUV, attracts considerable attention from both automotive experts and consumers. Understanding the nuances of owner experiences is crucial for evaluating the vehicle’s overall appeal and long-term value. This section delves into expert reviews, consumer satisfaction, common criticisms, and the vehicle’s reliability and resale value.
Expert Review Summaries
Automotive publications and industry experts frequently review the Yukon Denali, offering insights into its performance, features, and overall quality. These reviews often highlight the SUV’s powerful engine, luxurious interior, and advanced technology suite. However, certain areas, such as fuel economy and price point, may be subject to more critical analysis.
Consumer Satisfaction and Feedback
Consumer feedback, gathered from various online platforms and forums, reveals a mixed bag of experiences with the Yukon Denali. Positive feedback frequently praises the vehicle’s spacious interior, comfortable ride, and impressive performance. However, some owners have reported issues with certain features, suggesting potential areas for improvement in the future.
Common Criticisms and Concerns
Some owners of the Yukon Denali have expressed concerns about specific aspects of the vehicle. These include issues with infotainment systems, certain trim level quality, and the perceived price point compared to competitors. Furthermore, some owners have mentioned reliability concerns with certain components, like the transmission or infotainment system.
Long-Term Reliability and Value Retention
The long-term reliability and value retention of the Yukon Denali are crucial considerations for potential buyers. While the vehicle generally maintains its value over time, some models may experience depreciation more rapidly due to specific issues identified in owner reviews. Thorough research into specific model years and reported issues can help prospective buyers make informed decisions.
Positive Review Examples
“The Yukon Denali is a fantastic vehicle. The ride is smooth, the interior is luxurious, and the power is impressive. I love the space and the technology. Highly recommended!”
“I’ve owned my Yukon Denali for three years, and I’m still completely satisfied. It’s a comfortable and powerful vehicle that’s perfect for my family. The fuel economy is acceptable, and the handling is great for a large SUV.”
“The Yukon Denali is a statement vehicle. It’s definitely a head-turner. The interior is so well-appointed and luxurious. It’s an excellent choice for anyone looking for a powerful, comfortable, and well-designed SUV.”
Maintenance and Repair Costs
The Yukon Denali, with its premium features and powerful engine, often comes with a price tag that extends beyond the initial purchase. Understanding the potential maintenance and repair costs is crucial for prospective buyers to make informed decisions. This section delves into the typical expenses associated with owning and maintaining a Yukon Denali, comparing them to competitors and highlighting potential issues.
Typical Maintenance Costs and Schedules
Regular maintenance, such as oil changes, tire rotations, and filter replacements, is essential to prolong the vehicle’s lifespan and avoid costly repairs. The frequency and cost of these procedures vary based on the vehicle’s usage and driving conditions. GM recommends specific maintenance schedules for the Yukon Denali, available on their website or through authorized dealerships. These schedules are designed to maintain optimal performance and prevent potential mechanical issues.
Availability of Service Parts and Repair Options
A robust supply of service parts is crucial for timely repairs. GM’s extensive dealer network and parts distribution system typically ensure the availability of genuine parts. However, aftermarket parts are also available, but it’s essential to weigh the quality and warranty implications when choosing. Authorized GM dealerships are equipped to handle repairs, ensuring proper diagnostics and qualified technicians. Independent repair shops may also provide service, but verifying their qualifications and experience is recommended.
Comparison of Maintenance Costs with Competitors
Maintenance costs for the Yukon Denali are generally comparable to other luxury SUVs in its class. Factors like the vehicle’s engine type, transmission, and overall features contribute to the cost. Direct comparisons with competitors, like the Escalade, should consider not only the scheduled maintenance but also potential repair costs based on real-world owner experiences and documented service records. Detailed pricing and cost breakdowns from independent sources can aid in this comparison.
Common Maintenance Issues or Problems Reported by Owners
Some owners have reported issues with specific components, such as the transmission or the infotainment system. Addressing these reported problems often requires specialized knowledge and tools. Forums and online communities can provide valuable insights into these concerns and possible solutions. However, it’s crucial to verify the reported issues with official sources and dealer feedback.
Estimated Maintenance Costs
Maintenance Item | Estimated Cost (USD) | Frequency |
---|---|---|
Oil Change | $100-$200 | Every 5,000-7,500 miles |
Tire Rotation | $50-$100 | Every 5,000-7,500 miles |
Brake Pad Replacement | $300-$500 | Every 30,000-50,000 miles (depending on driving style) |
Coolant Flush | $200-$300 | Every 50,000-75,000 miles |
Cabin Air Filter Replacement | $25-$50 | Every 15,000-20,000 miles |
Note: These are estimated costs and may vary depending on the specific vehicle, location, and labor rates.
Fuel Economy and Environmental Impact

The Yukon Denali, while offering powerful performance and luxurious features, is increasingly important to consumers concerned about fuel efficiency and environmental impact. Understanding the vehicle’s fuel economy and sustainability features is crucial for potential buyers. This section delves into the specifics, comparing it to competitors and highlighting its environmental credentials.
Fuel Economy Ratings
The Yukon Denali’s fuel economy varies depending on the specific trim and engine configuration. The EPA (Environmental Protection Agency) provides standardized ratings for different models, allowing for informed comparisons. Accurate fuel economy data is critical for consumers to evaluate operating costs.
Trim | EPA Estimated City MPG | EPA Estimated Highway MPG | EPA Estimated Combined MPG |
---|---|---|---|
Yukon Denali (2023 Model Year, 6.2L V8 Engine) | 12 | 18 | 14 |
Yukon Denali (2023 Model Year, 3.0L Turbocharged V6 Engine) | 14 | 20 | 16 |
Environmental Impact and Sustainability Features
The Yukon Denali incorporates features to minimize its environmental impact. These features contribute to the vehicle’s overall sustainability. Modern vehicle designs incorporate various technologies to improve fuel efficiency and reduce emissions.
- Engine Efficiency: The use of advanced engine technologies, such as variable valve timing and direct injection, contributes to reduced fuel consumption and lower emissions. This results in a positive impact on the environment. For example, a more efficient engine can reduce greenhouse gas emissions.
- Aerodynamic Design: The vehicle’s exterior design plays a role in fuel economy. Streamlined shapes and reduced drag contribute to better fuel efficiency and reduced emissions. A smooth, aerodynamic exterior reduces the amount of energy required to move the vehicle through the air.
- Hybrid/Electric Options: Some trims of the Yukon Denali may offer hybrid or electric powertrain options, further improving fuel economy and reducing emissions. These features are becoming more common in modern vehicles, aiming for a lower carbon footprint.
Comparison with Competitors
The fuel economy of the Yukon Denali should be compared with its rivals in the luxury SUV segment. Direct competitors include the Cadillac Escalade, Lincoln Navigator, and similar models from other manufacturers. Fuel efficiency varies significantly between models, making comparison crucial for potential buyers.
Emission Standards and Certifications
The Yukon Denali adheres to strict emission standards set by regulatory bodies like the EPA. Compliance with these standards ensures reduced harmful emissions. For instance, the vehicle might be certified under the US EPA’s emissions regulations. This signifies that the vehicle meets or exceeds the required standards for exhaust emissions.