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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1121 (Rear Drive Axle) >> Repair Instructions >> Lubricant Change >> Filling Procedure

Filling Procedure

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Differential Drain Plug
    GM814134Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice .
  1. Install the drain plug to the differential.

    Tighten:  Tighten the differential drain plug to 39 N.m (29 lb ft).

    2. Fig 2: Identifying Differential Fill Plug
    GM814133Courtesy of GENERAL MOTORS CORP.
  2. Clean any dirt from around the differential fill plug.
  3. Remove the fill plug from the differential.
    4. IMPORTANT: If equipped with a limited slip differential, limited slip differential lubricant additive, GM P/N 1052358 (Canadian P/N 992394) or equivalent must be added first. Refer to Lubrication Specifications . Approximately 0.23 L (7.8 oz) of residual fluid will remain in the differential.
  4. Fill the differential with 75W90 synthetic axle lubricant, GM P/N 12378261 (Canadian P/N 10953455) or equivalent. Refer to Lubrication Specifications .
  5. Inspect the gear lubricant level to ensure it is even with the bottom of the fill plug hole to no lower than 6 mm (0.25 in) below the opening.
  6. Install the fill plug to the differential.

    Tighten:  Tighten the fill plug to 39 N.m (29 lb ft).

  7. Lower the vehicle.
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