GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2008 🢒 TopKick C-Series (Conventional) C4/C5 🢒 General Information 🢒 General Information 🢒 Rear Axle Lubricant Replacement

Removal Procedure
  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .

    2. Object Number: 730544 Size: SH
  2. Remove the fill plug.
  3. Remove the rear axle housing cover bolts.
  4. Remove the rear axle housing cover.

    5. Drain the lubricant into a suitable container.

  5. Remove the sealant from the rear axle housing and the rear axle housing cover.

Installation Procedure

    Object Number: 739939 Size: SH
  1. Apply an approximately 3.18-6.35 mm (1/8-1/4 in) high and 3.18-6.35 mm (1/8-1/4 in) wide bead of sealant GM P/N 12346240 (Canadian P/N 10953493) or equivalent to the rear axle housing cover.

    2. The sealant is to be applied in the middle of the rear axle housing cover flange and on the inside of all bolt hole openings as shown.


    Object Number: 730544 Size: SH
  2. Install the rear axle housing cover.

    3. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the rear axle housing cover bolts.

    4. Tighten
    Tighten the rear axle housing cover bolts to 47 N·m (35 lb ft).

    Important: Allow the sealant to cure for 1 hour before filling the axle with axle lubricant.

  4. Fill the rear axle with axle lubricant. Use the proper fluid. Refer to Approximate Fluid Capacities and Fluid and Lubricant Recommendations .
  5. Install rear axle fill plug.

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

  6. Lower the vehicle.