GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC C-Series Medium Duty Truck B7 🢒 Transmission/Transaxle 🢒 Manual Transmission - Medium Duty 🢒 Transmission Oil Changing

Removal Procedure
  1. Clean the area around the drain and fill plugs.
  2. Remove the oil fill plug from the transmission case.
  3. Remove the oil drain plug from the transmission case.
  4. Position a container under the oil drain hole in order to catch the transmission oil.

Installation Procedure

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  1. Install the oil drain plug to the transmission case.

    2. Tighten

    1. Tighten the Eaton® FS Transmission oil drain plug to 31 N·m (23 lb ft).
    2. Tighten the Eaton® RT Transmission oil drain plug to 68 N·m (50 lb ft).
    3. Tighten the Spicer® ES Transmission oil drain plug to 45 N·m (33 lb ft).
  2. Fill the transmission with oil to the level of the oil fill plug hole. Refer to Lubrication Specifications .
  3. Install the oil plug to the transmission case.