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Lubricant Level Inspection - Rear Drive Axle (8.6 Inch Axle)

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Raise the vehicle. Refer to JACKING AND LIFTING .
  2. Make sure the vehicle is level.
  3. Inspect the rear axle for leaks. Repair as necessary.
  4. Clean the area around the rear axle fill plug.
  5. Remove the rear axle fill plug.
  6. Fabricate a dipstick from a pipe cleaner or similar item. From the pipe cleaner into an "L".
  7. Insert the pipe cleaner into the fill plug opening with the stem facing down.
    8. Fig 1: Rear Axle Fill Plug
    G01480595Courtesy of GENERAL MOTORS CORP.
  8. Remove the pipe cleaner and measure the distance from the bend in the pipe cleaner to the lubricant level.

    Specification 

    The distance between the bend and the lubricant level should be 15-40 mm (0.6-1.6 in).

  9. If the measurement is greater than 40 mm (1.6 in), add lubricant until the level is between 15-40 mm (0.6-1.6 in) from the bottom edge of the fill plug hole. Use the proper fluid.
    NOTE: Refer to FASTENER NOTICE .
  10. Install the rear axle fill plug.

    Tighten

    Tighten the rear axle fill plug to 33 N.m (24 lb ft).

  11. Lower the vehicle.
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