What Is General Motors’ (GM) Official OEM Scan Tool System?

Are you looking to diagnose and repair General Motors vehicles with the same level of accuracy and efficiency as a dealership? The General Motors’ (GM) official OEM scan tool system, GDS2/MDI, is the key, and at CAR-SCAN-TOOL.EDU.VN, we provide in-depth training to help you master this powerful tool. Unlock the full potential of your diagnostic capabilities and enhance your automotive career through our specialized courses focused on GM diagnostic systems and remote technician education.

1. Understanding the General Motors (GM) Official OEM Scan Tool System

What exactly is the General Motors’ (GM) official OEM scan tool system, and why is it crucial for servicing GM vehicles? The General Motors’ (GM) official OEM scan tool system is a combination of hardware and software designed specifically for diagnosing, repairing, and reprogramming GM vehicles, essential for any technician working on modern GM cars. Knowing about automotive scanner training helps in understanding the functions of this complex system.

• GDS2 (Global Diagnostic System 2): This is the software component that allows technicians to communicate with vehicle modules, read diagnostic trouble codes (DTCs), view live data, perform bi-directional controls, and reprogram electronic control units (ECUs).
• MDI (Multiple Diagnostic Interface): This is the hardware interface that connects the vehicle to the technician’s computer, acting as a communication bridge between the GDS2 software and the vehicle’s systems.

1.1. Why Use the Official GM Scan Tool System?

Why should technicians invest in the official GM scan tool system when aftermarket options are available? Using the official GM scan tool system ensures complete compatibility, access to the latest updates, and the ability to perform all necessary diagnostic and reprogramming functions, providing you with the most comprehensive and accurate diagnostic capabilities.

• Complete Compatibility: The OEM tool is designed specifically for GM vehicles, ensuring seamless communication with all modules and systems.
• Access to Latest Updates: GM regularly releases software updates to address new models, features, and diagnostic procedures. The official tool provides access to these updates, keeping your diagnostic capabilities current.
• Full Functionality: The official tool allows you to perform all necessary diagnostic and reprogramming functions, including reading and clearing DTCs, viewing live data, performing bi-directional controls, and reprogramming ECUs.

1.2. Evolution of GM Scan Tools

How has the GM scan tool system evolved over the years, and what led to the development of GDS2/MDI? The evolution of GM scan tools reflects the increasing complexity of vehicle technology, with GDS2/MDI representing the latest generation of diagnostic tools designed to support GM’s global vehicle platforms.

• Tech 1: GM’s earliest scan tool, primarily used for OBDI systems.
• Tech 2: A significant upgrade, supporting OBDII systems and providing more advanced diagnostic capabilities.
• GDS2/MDI: The current system, designed to support GM’s global vehicle platforms and provide comprehensive diagnostic and reprogramming capabilities.

2. Key Features and Functions of GDS2/MDI

What are the key features and functions of the GDS2/MDI system, and how do they assist technicians in diagnosing and repairing GM vehicles? GDS2/MDI offers a wide range of features and functions, including DTC reading and clearing, live data streaming, bi-directional controls, and ECU reprogramming, making it an indispensable tool for GM vehicle diagnostics.

2.1. Diagnostic Trouble Codes (DTCs)

How does GDS2/MDI help technicians read and interpret DTCs, and why is this crucial for accurate diagnosis? GDS2/MDI provides detailed information about DTCs, including code definitions, possible causes, and recommended repair procedures, enabling technicians to quickly identify and address vehicle issues, an essential part of automotive scanner training.

• Reading DTCs: GDS2/MDI can quickly read DTCs from all vehicle modules, providing a comprehensive overview of system faults.
• Interpreting DTCs: The system provides detailed information about each DTC, including the code definition, possible causes, and recommended repair procedures.
• Clearing DTCs: After completing repairs, GDS2/MDI can be used to clear DTCs and verify that the issue has been resolved.

2.2. Live Data Streaming

What is live data streaming, and how does GDS2/MDI enable technicians to monitor real-time vehicle data for diagnostic purposes? Live data streaming allows technicians to monitor real-time vehicle data, such as sensor readings and component status, providing valuable insights into system performance and helping to identify intermittent issues.

• Monitoring Real-Time Data: GDS2/MDI can display live data from various vehicle sensors and components, allowing technicians to monitor system performance in real-time.
• Identifying Intermittent Issues: Live data streaming can help identify intermittent issues that may not trigger DTCs, providing valuable insights for diagnosis.
• Graphing Data: GDS2/MDI allows technicians to graph live data, making it easier to visualize trends and identify anomalies.

2.3. Bi-Directional Controls

What are bi-directional controls, and how does GDS2/MDI use them to test and verify the functionality of vehicle components? Bi-directional controls allow technicians to command vehicle components to perform specific actions, such as activating a relay or cycling a solenoid, enabling them to test and verify component functionality.

• Activating Components: GDS2/MDI can command vehicle components to perform specific actions, such as activating a relay or cycling a solenoid.
• Testing Functionality: Bi-directional controls allow technicians to test and verify the functionality of vehicle components, ensuring they are working as intended.
• Isolating Faults: By selectively activating components, technicians can isolate faults and identify the root cause of a problem.

2.4. ECU Reprogramming

What is ECU reprogramming, and how does GDS2/MDI facilitate the process of updating or replacing vehicle software? ECU reprogramming involves updating or replacing the software in a vehicle’s electronic control units (ECUs), and GDS2/MDI provides the necessary tools and procedures to perform this function safely and effectively.

• Updating Software: GDS2/MDI can be used to update the software in a vehicle’s ECUs, addressing software bugs, improving performance, and adding new features.
• Replacing Software: In some cases, it may be necessary to replace the software in an ECU, such as when an ECU has failed or been damaged.
• Following Procedures: GDS2/MDI provides detailed procedures for ECU reprogramming, ensuring that the process is performed safely and effectively.

3. Benefits of Using GDS2/MDI in Automotive Repair

What are the specific benefits of using GDS2/MDI in automotive repair, and how does it improve the efficiency and accuracy of diagnostic and repair procedures? Using GDS2/MDI offers numerous benefits, including improved diagnostic accuracy, faster repair times, and enhanced customer satisfaction, making it a worthwhile investment for any automotive repair shop.

3.1. Improved Diagnostic Accuracy

How does GDS2/MDI improve diagnostic accuracy, and why is this crucial for effective repairs? GDS2/MDI provides access to comprehensive vehicle data, detailed diagnostic information, and advanced testing capabilities, enabling technicians to diagnose issues with greater accuracy and avoid misdiagnosis.

• Comprehensive Vehicle Data: GDS2/MDI provides access to comprehensive vehicle data, including DTCs, live data, and freeze frame data, giving technicians a complete picture of the vehicle’s condition.
• Detailed Diagnostic Information: The system provides detailed information about DTCs, including code definitions, possible causes, and recommended repair procedures.
• Advanced Testing Capabilities: GDS2/MDI offers advanced testing capabilities, such as bi-directional controls and ECU reprogramming, allowing technicians to thoroughly test and verify vehicle systems.

3.2. Faster Repair Times

How does GDS2/MDI contribute to faster repair times, and what impact does this have on shop productivity? GDS2/MDI streamlines the diagnostic process, reduces the need for guesswork, and provides access to repair information, leading to faster repair times and increased shop productivity, a key benefit highlighted in automotive scanner training.

• Streamlined Diagnostic Process: GDS2/MDI streamlines the diagnostic process by providing quick access to vehicle data and diagnostic information.
• Reduced Guesswork: The system’s detailed diagnostic information and testing capabilities reduce the need for guesswork, allowing technicians to focus on the root cause of the problem.
• Access to Repair Information: GDS2/MDI provides access to repair information, such as wiring diagrams and component locations, helping technicians to quickly and efficiently complete repairs.

3.3. Enhanced Customer Satisfaction

How does GDS2/MDI contribute to enhanced customer satisfaction, and why is this important for building a successful automotive repair business? By improving diagnostic accuracy and reducing repair times, GDS2/MDI helps technicians provide better service, leading to enhanced customer satisfaction and a stronger reputation for the repair shop.

• Better Service: GDS2/MDI helps technicians provide better service by improving diagnostic accuracy and reducing repair times.
• Increased Trust: Customers are more likely to trust a repair shop that uses advanced diagnostic tools and provides accurate, efficient service.
• Positive Reputation: Enhanced customer satisfaction leads to a positive reputation for the repair shop, attracting new customers and building a loyal customer base.

4. GDS2/MDI Software and Hardware Requirements

What are the specific software and hardware requirements for using GDS2/MDI, and how can technicians ensure they have the necessary equipment and resources? Using GDS2/MDI requires specific software and hardware, including a compatible computer, the MDI interface device, and a subscription to GM’s diagnostic software, essential knowledge for anyone involved in remote technician education.

4.1. Software Requirements

What are the software requirements for GDS2/MDI, and where can technicians obtain the necessary software and updates? GDS2/MDI requires a subscription to GM’s diagnostic software, which can be obtained through GM’s service information website, and regular updates are necessary to ensure compatibility with the latest vehicle models and diagnostic procedures.

• Subscription to GM’s Diagnostic Software: GDS2/MDI requires a subscription to GM’s diagnostic software, which provides access to the latest vehicle data and diagnostic information.
• Regular Updates: Regular software updates are necessary to ensure compatibility with the latest vehicle models and diagnostic procedures.
• GM’s Service Information Website: Technicians can obtain the necessary software and updates through GM’s service information website.

4.2. Hardware Requirements

What are the hardware requirements for GDS2/MDI, and what are the recommended specifications for the computer and interface device? GDS2/MDI requires a compatible computer with sufficient processing power and memory, as well as the MDI interface device, which connects the computer to the vehicle’s diagnostic port.

• Compatible Computer: GDS2/MDI requires a compatible computer with sufficient processing power and memory to run the software smoothly.
• MDI Interface Device: The MDI interface device connects the computer to the vehicle’s diagnostic port, allowing communication with vehicle modules.
• Recommended Specifications: GM provides recommended specifications for the computer and interface device, ensuring optimal performance and compatibility.

4.3. Internet Access

Why is internet access required for using GDS2/MDI, and what functions rely on a stable internet connection? Internet access is required for GDS2/MDI to access vehicle data, download software updates, and perform ECU reprogramming, making a stable internet connection essential for using the system effectively.

• Accessing Vehicle Data: GDS2/MDI requires internet access to access vehicle data from GM’s servers, including DTC definitions, repair procedures, and wiring diagrams.
• Downloading Software Updates: Regular software updates are necessary to ensure compatibility with the latest vehicle models and diagnostic procedures, and these updates are downloaded via the internet.
• Performing ECU Reprogramming: ECU reprogramming requires a stable internet connection to download the necessary software files and communicate with GM’s servers.

5. Training and Certification for GDS2/MDI

What training and certification programs are available for GDS2/MDI, and how can technicians enhance their skills and knowledge in using this diagnostic tool? Several training and certification programs are available for GDS2/MDI, including online courses, hands-on workshops, and certification exams, allowing technicians to enhance their skills and knowledge in using the system effectively. CAR-SCAN-TOOL.EDU.VN is your go to resource.

5.1. Online Courses

What online courses are available for GDS2/MDI, and what topics do they cover? Online courses provide a flexible and convenient way for technicians to learn about GDS2/MDI, covering topics such as basic operation, diagnostic procedures, and ECU reprogramming, making them ideal for remote technician education.

• Basic Operation: These courses cover the basic operation of GDS2/MDI, including how to connect to a vehicle, read DTCs, and view live data.
• Diagnostic Procedures: These courses cover diagnostic procedures for various vehicle systems, such as engine, transmission, and ABS.
• ECU Reprogramming: These courses cover the process of ECU reprogramming, including how to download software files and perform the reprogramming procedure.

5.2. Hands-On Workshops

What are the benefits of attending hands-on workshops for GDS2/MDI, and what practical skills can technicians develop through these workshops? Hands-on workshops provide technicians with the opportunity to practice using GDS2/MDI under the guidance of experienced instructors, developing practical skills and gaining confidence in their ability to diagnose and repair GM vehicles.

• Practical Skills Development: Hands-on workshops allow technicians to develop practical skills in using GDS2/MDI, such as connecting to a vehicle, reading DTCs, and performing bi-directional controls.
• Guidance from Experienced Instructors: Experienced instructors provide guidance and support, helping technicians to overcome challenges and improve their skills.
• Confidence Building: Hands-on workshops build confidence in technicians’ ability to diagnose and repair GM vehicles using GDS2/MDI.

5.3. Certification Exams

What are the requirements for obtaining GDS2/MDI certification, and what benefits does certification offer to technicians? Certification exams assess technicians’ knowledge and skills in using GDS2/MDI, and obtaining certification demonstrates their competence and commitment to providing high-quality service, enhancing their career prospects and earning potential.

• Knowledge and Skills Assessment: Certification exams assess technicians’ knowledge and skills in using GDS2/MDI, ensuring they have the necessary competence to diagnose and repair GM vehicles.
• Demonstration of Competence: Obtaining certification demonstrates technicians’ competence and commitment to providing high-quality service.
• Career Advancement: Certification can enhance technicians’ career prospects and earning potential, as it is often required by employers and recognized by customers.

6. Common Issues and Troubleshooting with GDS2/MDI

What are some common issues that technicians may encounter while using GDS2/MDI, and how can they troubleshoot these problems effectively? Technicians may encounter various issues while using GDS2/MDI, such as connectivity problems, software errors, and communication failures, and troubleshooting these issues requires a systematic approach and a good understanding of the system’s operation, skills taught at CAR-SCAN-TOOL.EDU.VN.

6.1. Connectivity Problems

What are the common causes of connectivity problems with GDS2/MDI, and how can technicians resolve these issues? Connectivity problems can occur due to faulty cables, incorrect settings, or software conflicts, and resolving these issues requires checking the connections, verifying the settings, and updating the software.

• Faulty Cables: Check the cables for damage and ensure they are properly connected to the computer and the vehicle.
• Incorrect Settings: Verify that the settings in GDS2/MDI are correct, such as the vehicle communication interface (VCI) selection and the communication protocol.
• Software Conflicts: Ensure that there are no software conflicts that may be interfering with the communication between GDS2/MDI and the vehicle.

6.2. Software Errors

What are the common software errors that technicians may encounter while using GDS2/MDI, and how can they address these errors? Software errors can occur due to corrupted files, outdated versions, or compatibility issues, and addressing these errors requires reinstalling the software, updating to the latest version, and ensuring compatibility with the operating system.

• Corrupted Files: Reinstall the software to replace any corrupted files that may be causing errors.
• Outdated Versions: Update to the latest version of GDS2/MDI to ensure compatibility with the latest vehicle models and diagnostic procedures.
• Compatibility Issues: Ensure that GDS2/MDI is compatible with the operating system and other software installed on the computer.

6.3. Communication Failures

What are the common causes of communication failures with GDS2/MDI, and how can technicians diagnose and resolve these issues? Communication failures can occur due to faulty vehicle modules, wiring problems, or incorrect diagnostic procedures, and diagnosing these issues requires checking the vehicle’s wiring, testing the modules, and following the correct diagnostic procedures.

• Faulty Vehicle Modules: Test the vehicle modules to ensure they are functioning properly and communicating with the diagnostic system.
• Wiring Problems: Check the vehicle’s wiring for damage and ensure that all connections are secure.
• Incorrect Diagnostic Procedures: Follow the correct diagnostic procedures for the specific vehicle and system being tested.

7. GDS2/MDI vs. Aftermarket Scan Tools

How does GDS2/MDI compare to aftermarket scan tools in terms of functionality, accuracy, and compatibility, and why might technicians prefer the OEM tool over aftermarket options? GDS2/MDI offers complete compatibility, access to the latest updates, and the ability to perform all necessary diagnostic and reprogramming functions, making it a superior choice for servicing GM vehicles compared to aftermarket scan tools.

7.1. Functionality

How does the functionality of GDS2/MDI differ from that of aftermarket scan tools, and what specific capabilities does the OEM tool offer that aftermarket tools may lack? GDS2/MDI offers complete functionality for diagnosing and repairing GM vehicles, including access to all vehicle modules, bi-directional controls, and ECU reprogramming, while aftermarket scan tools may have limited functionality or require additional subscriptions.

• Complete Access to Vehicle Modules: GDS2/MDI provides complete access to all vehicle modules, allowing technicians to diagnose and repair any system on the vehicle.
• Bi-Directional Controls: GDS2/MDI offers bi-directional controls for testing and verifying the functionality of vehicle components.
• ECU Reprogramming: GDS2/MDI allows technicians to reprogram ECUs, updating software and addressing software bugs.

7.2. Accuracy

How does the accuracy of GDS2/MDI compare to that of aftermarket scan tools, and why is accuracy crucial for effective diagnostics? GDS2/MDI provides accurate and reliable diagnostic information, ensuring that technicians can identify the root cause of vehicle problems and perform effective repairs, while aftermarket scan tools may provide inaccurate or incomplete information.

• Reliable Diagnostic Information: GDS2/MDI provides reliable diagnostic information, including DTC definitions, live data, and freeze frame data.
• Accurate Readings: The system provides accurate readings from vehicle sensors and components, allowing technicians to monitor system performance in real-time.
• Effective Repairs: Accurate diagnostic information leads to effective repairs, reducing the risk of misdiagnosis and repeat repairs.

7.3. Compatibility

How does the compatibility of GDS2/MDI differ from that of aftermarket scan tools, and why is compatibility important for seamless diagnostics? GDS2/MDI is designed specifically for GM vehicles, ensuring seamless communication with all modules and systems, while aftermarket scan tools may have compatibility issues or require additional adapters.

• Seamless Communication: GDS2/MDI ensures seamless communication with all modules and systems on GM vehicles.
• No Compatibility Issues: The system is designed to work with all GM vehicles, eliminating the risk of compatibility issues.
• No Additional Adapters: GDS2/MDI does not require additional adapters or cables for communication with different vehicle models.

8. Future Trends in GM Diagnostic Technology

What are the emerging trends in GM diagnostic technology, and how will these trends impact the future of automotive repair? Emerging trends in GM diagnostic technology include advanced driver-assistance systems (ADAS), over-the-air (OTA) updates, and remote diagnostics, requiring technicians to stay updated with the latest technologies and training programs.

8.1. Advanced Driver-Assistance Systems (ADAS)

How are ADAS impacting diagnostic technology, and what new tools and procedures are required for servicing vehicles with ADAS? ADAS are becoming increasingly common in modern vehicles, requiring new diagnostic tools and procedures to calibrate and repair these systems, including radar sensors, cameras, and control modules.

• Calibration Requirements: ADAS require precise calibration to ensure they are functioning correctly, and this requires specialized tools and procedures.
• Diagnostic Procedures: Diagnosing ADAS requires a thorough understanding of the system’s operation and the use of diagnostic tools to identify faults.
• Repair Procedures: Repairing ADAS may involve replacing sensors, cameras, or control modules, and then calibrating the system to ensure proper functionality.

8.2. Over-the-Air (OTA) Updates

How are OTA updates changing the way vehicles are serviced, and what implications do they have for diagnostic technology? OTA updates allow manufacturers to update vehicle software remotely, addressing software bugs, improving performance, and adding new features, reducing the need for physical visits to the repair shop.

• Remote Software Updates: OTA updates allow manufacturers to update vehicle software remotely, eliminating the need for physical visits to the repair shop.
• Reduced Downtime: OTA updates reduce vehicle downtime, as software updates can be performed quickly and easily without requiring the vehicle to be taken out of service.
• Improved Performance: OTA updates can improve vehicle performance by addressing software bugs and adding new features.

8.3. Remote Diagnostics

How is remote diagnostics transforming the automotive repair industry, and what opportunities does it create for technicians and repair shops? Remote diagnostics allow technicians to diagnose vehicle problems remotely, using telematics data and diagnostic tools to identify faults and provide repair recommendations, enabling them to service vehicles from anywhere in the world.

• Remote Vehicle Servicing: Remote diagnostics allows technicians to service vehicles from anywhere in the world, using telematics data and diagnostic tools to identify faults and provide repair recommendations.
• Increased Efficiency: Remote diagnostics increases efficiency by reducing the need for physical visits to the repair shop and allowing technicians to diagnose problems quickly and accurately.
• New Business Opportunities: Remote diagnostics creates new business opportunities for technicians and repair shops, allowing them to expand their service offerings and reach a wider customer base.

9. Optimizing Your Automotive Career with CAR-SCAN-TOOL.EDU.VN

Are you ready to take your automotive career to the next level? At CAR-SCAN-TOOL.EDU.VN, we offer comprehensive training programs designed to help you master the latest diagnostic technologies, including GDS2/MDI. Our expert instructors and hands-on training approach will equip you with the skills and knowledge you need to succeed in today’s rapidly evolving automotive industry.

9.1. Comprehensive Training Programs

What types of training programs does CAR-SCAN-TOOL.EDU.VN offer, and how can these programs help technicians enhance their skills and knowledge? CAR-SCAN-TOOL.EDU.VN offers a variety of training programs, including online courses, hands-on workshops, and certification preparation, covering topics such as basic diagnostics, advanced diagnostics, and ECU reprogramming.

9.2. Expert Instructors

Who are the instructors at CAR-SCAN-TOOL.EDU.VN, and what experience and expertise do they bring to the training programs? Our instructors are experienced automotive technicians and industry experts with a passion for teaching and a commitment to helping students succeed, providing valuable insights and guidance based on their real-world experience.

9.3. Hands-On Training

Why is hands-on training important for learning diagnostic technologies, and how does CAR-SCAN-TOOL.EDU.VN incorporate hands-on training into its programs? Hands-on training provides technicians with the opportunity to practice using diagnostic tools and equipment under the guidance of experienced instructors, developing practical skills and gaining confidence in their ability to diagnose and repair vehicles.

10. Frequently Asked Questions (FAQs) About GM Scan Tools

Still have questions about GM scan tools and how to use them effectively? Here are some frequently asked questions to help you better understand these powerful diagnostic tools and how they can benefit your automotive career.

10.1. What is the best GM scan tool for a beginner technician?

For a beginner, a good starting point is an OBDII scanner that can read and clear basic codes. However, to truly diagnose GM vehicles effectively, investing in a GDS2/MDI system or a Tech 2 with proper training is recommended as your skills develop.

10.2. How often should I update my GM scan tool software?

It’s recommended to update your GM scan tool software regularly, ideally whenever GM releases new updates. This ensures you have the latest vehicle coverage, diagnostic procedures, and software enhancements.

10.3. Can I use an aftermarket scan tool for all GM vehicles?

While some aftermarket scan tools offer coverage for GM vehicles, they may not have the same level of functionality, accuracy, and compatibility as the official GM scan tools. For comprehensive diagnostics and reprogramming, the GDS2/MDI system is the preferred choice.

10.4. What are the benefits of remote technician education for GM scan tools?

Remote technician education offers flexibility, convenience, and cost-effectiveness, allowing technicians to learn at their own pace and schedule. It also provides access to expert instructors and hands-on training from anywhere in the world.

10.5. How can I find a reputable training program for GM scan tools?

Look for training programs that are certified by GM or other reputable organizations, and that are taught by experienced instructors with a proven track record. CAR-SCAN-TOOL.EDU.VN offers comprehensive training programs designed to help you master GM scan tools and diagnostic procedures.

10.6. What is the difference between GDS and GDS2?

GDS (Global Diagnostic System) was the original software used for early Global A vehicles. GDS2 (Global Diagnostic System 2) is the updated version that supports a wider range of GM vehicles and offers enhanced features and functionality.

10.7. Do I need a separate subscription for each GM vehicle I work on?

No, a single subscription to GM’s diagnostic software covers all GM vehicles supported by the GDS2/MDI system. However, you may need to purchase additional subscriptions for access to specific vehicle data or diagnostic procedures.

10.8. Can I perform ECU reprogramming with an aftermarket scan tool?

Some aftermarket scan tools offer ECU reprogramming capabilities, but they may not be as reliable or comprehensive as the official GM scan tools. For safe and effective ECU reprogramming, the GDS2/MDI system is recommended.

10.9. How long does it take to become proficient in using GM scan tools?

Proficiency in using GM scan tools depends on your experience, training, and dedication. With proper training and practice, you can become proficient in using these tools within a few months.

10.10. What career opportunities are available for technicians with expertise in GM scan tools?

Technicians with expertise in GM scan tools are in high demand in the automotive industry, with career opportunities available in dealerships, independent repair shops, and diagnostic centers. They can also pursue careers in training, technical support, and product development.

Ready to master the General Motors’ (GM) official OEM scan tool system and elevate your automotive career? Contact CAR-SCAN-TOOL.EDU.VN today at Whatsapp: +1 (641) 206-8880 or visit our website CAR-SCAN-TOOL.EDU.VN to learn more about our comprehensive training programs and unlock your full potential. Our office is located at 555 Automotive Way, Suite 100, Los Angeles, CA 90017, United States. Don’t wait, start your journey to becoming a GM diagnostic expert today!