Fraser Engine Rebuilders, Inc.


FITS GM VEHICLES (2014-2024)


FITS GM VEHICLES (2014-2022)
$ 6999 UNIT COST


Fraser Engines’ 6.2L GMC, CHEVY, CADILLAC DOD Delete Long Blocks are meticulously engineered to deliver unsurpassed performance and reliability. Each long block is equipped with the following premium components:

  1. Updated Non-AFM Camshaft: Precision-engineered to enhance engine efficiency and power output.
  2. 16 Hydraulic Roller Lifters (Non-AFM): Designed for optimal valve operation, ensuring smooth and quiet engine performance.
  3. Timing Cover: OEM – constructed to provide superior protection for timing components.
  4. Oil Pick-Up Tube: Optimally designed for efficient oil circulation, ensuring engine longevity.
  5. Oil Pump Solenoid Sensor: OEM – State-of-the-art sensor to monitor and regulate oil pressure with precision.
  6. Camshaft Position Sensor (Cam Sensor): OEM –  integrated to ensure optimal engine timing and performance.
  7. Oil Pump Solenoid Wire Sensor: OEM – Commands oil pump to increase oil pressure to optimum performance.
  8. Camshaft and Oil Pump Wiring Harness: OEM-designed to ensure seamless electrical connectivity and reliability.
  9. Actuator Magnet: OEM – to ensure precise valve timing, enhancing the engine’s overall performance.

Every component is selected and assembled with the utmost attention to detail, ensuring that each Fraser Engines 6.2L GMC, CHEVY, CADILLAC DOD Delete Long Block stands as a benchmark of quality and performance in the industry.


The 6.2L GM engine with a Displacement on Demand (DoD) delete, often referred to as Active Fuel Management (AFM) delete, involves modifying the engine to disable the system designed to shut off half of the engine’s cylinders under light-load conditions to improve fuel efficiency. This modification is popular among enthusiasts and owners of vehicles equipped with the 6.2L engine who are looking to increase performance, reliability, and possibly prevent common issues associated with the DoD/AFM system. Here’s how the DoD delete impacts the same models mentioned previously:


  • Chevrolet Silverado 1500: The DoD delete can lead to a noticeable improvement in performance and drivability, eliminating potential DoD-related problems such as excessive oil consumption and lifter failure. This is particularly beneficial for owners using their trucks for towing and heavy-duty tasks.
  • Chevrolet Camaro SS: For performance enthusiasts, removing DoD can enhance the driving experience by ensuring all eight cylinders are always engaged, providing consistent power delivery and a more aggressive engine note.
  • Chevrolet Tahoe & Suburban: These family-oriented SUVs can benefit from a DoD delete in terms of reliability and maintaining consistent power, especially useful for vehicles frequently used for towing or fully loaded trips.
  • Chevrolet Corvette: Performance and reliability are key for Corvette owners. A DoD delete can eliminate concerns over the system’s long-term durability and maintain the iconic V8 performance at all times.


  • GMC Sierra 1500: Similar to the Silverado, Sierra owners can see improved reliability and performance, making the truck more suited for demanding tasks without the worry of DoD-related issues.
  • GMC Yukon and Yukon XL: Eliminating DoD can provide a smoother, more consistent driving experience for these luxury SUVs, ensuring power is always available when needed.


  • Cadillac Escalade: For the flagship luxury SUV, a DoD delete means uninterrupted power and a reduction in potential DoD system maintenance issues, aligning with the vehicle’s premium status.
  • Cadillac CTS-V & CT5-V Blackwing: While high-performance models like the CTS-V and CT5-V Blackwing are less likely to have been affected by DoD due to their more aggressive tuning, disabling DoD in other high-performance Cadillacs ensures peak performance and engine sound.


A DOD (Displacement on Demand), also known as Active Fuel Management (AFM) in General Motors’ vehicles, is a technology designed to improve fuel efficiency and reduce emissions by deactivating a portion of the engine’s cylinders under certain driving conditions, typically during light load situations. However, some vehicle owners and technicians prefer to delete or disable this feature for various reasons. This process is referred to as a DOD Delete or AFM Delete. Here’s a comprehensive overview:

DOD Delete Engine Overview

  1. What is a DOD Delete?

    • A DOD Delete involves modifying an engine to disable the DOD/AFM system. This usually includes replacing specific components like lifters, camshaft, gaskets, and sometimes the valley cover, along with reprogramming the engine’s ECU (Engine Control Unit).
  2. Components Involved in a DOD Delete:

    • Non-AFM Lifters: Replacing AFM lifters with standard lifters to prevent cylinder deactivation.
    • Camshaft: Installing a non-AFM camshaft as the AFM system requires a specific type of camshaft.
    • Valley Cover: Some opt to replace the AFM-specific valley cover with a non-AFM version.
    • Gaskets and Bolts: Replacing various gaskets and bolts as part of the process.
    • ECU Reprogramming: The engine’s computer must be reprogrammed to recognize the changes and operate correctly without the DOD system.
  3. Common Reasons for DOD Delete:

    • Reliability: The DOD/AFM system, especially in earlier versions, has been known to have issues like excessive oil consumption, lifter failure, or unusual wear on engine components.
    • Performance: Some drivers prefer the consistent performance and throttle response of a full-time V8 engine.
    • Simplicity: Removing the DOD system simplifies the engine, potentially reducing future maintenance needs.

Advantages of DOD Delete for 2014-2022 Vehicles

  1. Increased Reliability: Earlier models with DOD/AFM were particularly prone to issues such as lifter failures or excessive oil consumption. Removing the system can lead to a more reliable engine lifespan.

  2. Consistent Performance: Drivers can enjoy the consistent power and torque of a full V8 engine without the transition between different modes, which can sometimes be felt as slight hesitation or roughness.

  3. Oil Consumption: Some DOD/AFM-equipped engines are known to consume more oil, especially when the system is engaging and disengaging. A DOD Delete can mitigate this issue.

  4. Sound: Enthusiasts often prefer the sound of a full V8 engine over one with active cylinder deactivation.

  5. Customization and Control: A DOD Delete gives more control back to the driver and mechanic, allowing for more traditional diagnostics and tuning.