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Duramax Fluid Capacities

Fluid Capacity

  • Fluid Type
    Application
    Standard
    Metric
    Fluid Spec
    Notes
  • Automatic Transmission Fluid
    Trans Mfr CD 1000/MW7 and 1000/M74 Drain and Refill
    7.40 QTS.
    7 L
    Automatic Transmission Fluid

    All capacities are approximate. When adding, be sure to fill to the approximate level. Recheck the fluid level after filling.

  • Brake Fluid
    N/A
    N/A
    Brake Fluid
  • Differential Gear Oil
    Front Axle 8.25"
    1.51 QTS.
    1.4 L
    Differential Gear Oil

    Front Axle (1500 Series 4WD): SAE 80W-90 Gear Oil. Front Axle (1500, 2500 HD, and 3500 HD Series): SAE 75W-90 Synthetic Gear Oil.

  • Differential Gear Oil
    Front Axle 9.25"
    1.83 QTS.
    1.7 L
    Differential Gear Oil

    Front Axle (1500 Series 4WD): SAE 80W-90 Gear Oil. Front Axle (1500, 2500 HD, and 3500 HD Series): SAE 75W-90 Synthetic Gear Oil.

  • Differential Gear Oil
    Rear Axle 10.5"
    2.75 QTS.
    2.6 L
    Differential Gear Oil
  • Differential Gear Oil
    Rear Axle 11.5"
    3.17 QTS.
    3 L
    Differential Gear Oil
  • Differential Gear Oil
    Rear Axle 8.6"
    2.15 QTS.
    2 L
    Differential Gear Oil
  • Differential Gear Oil
    Rear Axle 9.5"
    2.75 QTS.
    2.6 L
    Differential Gear Oil
  • Differential Gear Oil
    Rear Axle 9.75"
    3.00 QTS.
    2.8 L
    Differential Gear Oil

    Rear Axle (Steerable): Synthetic Gear Oil; use ONLY GM Part No.12378557. DO NOT add Friction Modifier.

  • Engine Oil
    6.6L Eng w/Filter
    10.00 QTS.
    9.5 L
    Engine Oil

    Use engine oils that have one of these designations: CI 4 or CH 4 for DURAMAX diesel engines. When it is very cold, below 0 Deg. F (-18Deg. C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.

  • Engine Oil
    6.6L Eng w/o Filter
    9.20 QTS.
    8.7 L
    Engine Oil

    Use ONLY engine oils that have one of these designations: CI 4 or CH 4 for DURAMAX diesel engines. When it is very cold, below 0Deg. F (-18Deg. C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.

  • Fuel Tank
    2500 HD
    26.00 GALS.
    98.4 L
    Fuel Tank
  • Fuel Tank
    3500 HD Front
    27.00 GALS.
    102.2 L
    Fuel Tank
  • Fuel Tank
    3500 HD Rear
    23.00 GALS.
    87.1 L
    Fuel Tank
  • Power Steering Fluid
    N/A
    N/A
    Power Steering Fluid

    GM Part No. 89021184.

  • Transfer Case Fluid
    T/Case Mfr CD 1625-6/NQF
    1.60 QTS.
    1.5 L
    Transfer Case Fluid
  • Transfer Case Fluid
    T/Case Mfr CD 3023-4/NQH
    1.60 QTS
    1.5 L
    Transfer Case Fluid
  • Transfer Case Fluid
    T/Case Mfr CD 263C
    2.00 Quarts
    1.9 L
    Transfer Case Fluid
  • Windshield Washer Fluid
    N/A
    N/A
    Windshield Washer Fluid

    Follow the Manufacturer’s Instructions for the mixture ratio.

Featured Article:

Evolution of the Duramax

As with most pickups in the industry, the Duramax line of diesel engines has come a long way from its inception to modern day. From the introduction of the LB7 almost 20 years ago, the engine output has nearly doubled its torque from approx. 500 lb-ft, to the modern-day workhorse pushing towards 1000 lb-ft, in the L5P engine line.

Though all of the Marketing departments at the big three diesel manufacturers tout the best in trucks, Dan Zelten of Dan’s Service Center (Eagle River, WI) claims he sees the least amount of Chevy’s in the shop for engine repairs. “A lot of Ford’s, however, have provided a good amount of business for us.”

For GM, they set the trend, teaming with Japanese manufacturer Isuzu, making it to market with the first redesign of the current-style high pressure direct-injector diesel engines. Dodge Cummins and Ford Power Strokes soon followed to take advantage of the new common rail injection design.

Prior to the release of the newly designed LB7, the Duramax was delivering 400+ lb-ft of torque. The revised 6.6L V-8 turbo diesel motor came along at the turn of the century featuring aluminum heads and 32 valves. With their high-pressure, common-rail, direct fuel injection mounted under the valve covers.

Read more HERE!

The contents of HotShotsSecret.com, such as text, graphics, images, and other material contained on the Diagnose Your Diesel section are for informational purposes only. Always seek the advice of your mechanic or other qualified professional with any questions you may have regarding your vehicle’s condition.

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